General purpose water accounting report 2014-15 Border Rivers · 2018. 4. 16. · This report may...

General Purpose Water Accounting Report 2014–2015

Border Rivers Catchment

i | DPI Water, April 2016

Publisher: NSW Department of Primary Industries, Water

Level 10, Macquarie Tower, Locked Bag 5123, Parramatta NSW 2124

Title: General Purpose Water Accounting Report 2014-2015 – Border Rivers Catchment

First published: May 2016

ISBN: 978-1-74256-910-9

This report may be cited as: Burrell M., Moss P., Ali A., Petrovic J. (2016) General Purpose Water Accounting Report 2014-2015: Border Rivers Catchment, NSW Department of Primary Industries, Sydney

More information [email protected] www.water.nsw.gov.au

Cover image: The Macintyre River at Boggabilla Weir, courtesy of the DPI Water Hydrometric Gauging Team

© State of New South Wales through the Department of Industry, Skills and Regional Development 2015. You may copy, distribute and otherwise freely deal with this publication for any purpose, provided that you attribute the NSW Department of Primary Industries as the owner.

Disclaimer: The information contained in this publication is based on knowledge and understanding at the time of writing (February 2016). However, because of advances in knowledge, users are reminded of the need to ensure that information upon which they rely is up to date and to check currency

General Purpose Water Accounting Report 2014-2015 – Border Rivers catchment

ii | DPI Water, April 2016

Table of Contents Abbreviations ......................................................................................................................... v Glossary ................................................................................................................................ vi Introduction ........................................................................................................................... 2 Contextual Statement ............................................................................................................ 3

Accounting Extent .............................................................................................................. 3 Climate .............................................................................................................................. 5 Dam inflows and volume .................................................................................................... 7 Major high flow events ....................................................................................................... 9 Surface water resources and management ........................................................................ 9 Environmental water .........................................................................................................13

Water Accounting Statements ..............................................................................................15 Border Rivers catchment: Physical flows mass balance diagram 2014-15 ....................17 Water Assets and Water Liabilities ................................................................................18 Changes in Water Assets and Water Liabilities .............................................................19

Note disclosures ...................................................................................................................22 Note 1 - Allocation accounts .............................................................................................25 Note 2 – Available Water Determination (AWD) (allocation announcement) .....................28 Note 3 – Allocation account usage ....................................................................................31 Note 4 – Water order debiting ...........................................................................................33 Note 5 - Allocation assignments (temporary trading) .........................................................34 Note 6 - Basic rights..........................................................................................................36 Note 7 - Held environmental water ....................................................................................37 Note 8 - Environmental Stimulus Account .........................................................................40 Note 9 - Account adjustments ...........................................................................................41 Note 10 - Surface water storage .......................................................................................42 Note 11 - River channel storage .......................................................................................43 Note 12 - Storage inflow – Glenlyon and Pindari Dams .....................................................44 Note 13 - Storage evaporation and storage rainfall ...........................................................45 Note 14 - River evaporation and river rainfall ....................................................................46 Note 15 - Gauged inflow ...................................................................................................47 Note 16 - Ungauged Inflow ...............................................................................................48 Note 17 – Flow leaving system/replenishments ................................................................49 Note 18 – NSW Extractions from River .............................................................................51 Note 19 – Storage Releases (including transparent releases) ...........................................52 Note 20 – QLD extractions ................................................................................................54 Note 21 – Supplementary extractions ...............................................................................55 Note 22 - Unaccounted volume .........................................................................................59

References ...........................................................................................................................60 Appendix 1 - Groundwater ....................................................................................................61

Groundwater bounded by Border Rivers surface water catchment....................................62 Groundwater Management 2014-15 .................................................................................65 Groundwater flows 2014-15 ..............................................................................................68


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Tables Table 1: 2014-15 monthly rainfall and historic monthly data at Pindari and

Mungindi ............................................................................................................ 5 Table 2: Water Allocation Licence Accounting Rules 2014-15 ....................................... 10 Table 3: Water account data accuracy estimates key .................................................... 16 Table 4: Explanatory information for allocation account summary .................................. 26 Table 5: Allocation account balance summary for the NSW regulated Border

Rivers 2014-15 ................................................................................................. 27 Table 6: Access licence category announcement type ................................................... 29 Table 7: Allocation Summary Report Notes.................................................................... 29 Table 8: 2014-15 NSW regulated Border Rivers allocation announcement

summary .......................................................................................................... 30 Table 9: Licence category metered usage apportionment table ..................................... 32 Table 10: Account usage summary 2014-15 .................................................................... 32 Table 11: 2014-15 allocation assignment summary ......................................................... 35 Table 12: Explanatory information for Environmental Account Summary ......................... 38 Table 13: Environmental account summary 2014-15 ....................................................... 39 Table 14: Annual change summary for environmental licences ........................................ 39 Table 15: Stimulus Flow Summary 2009-10 to 2014-15 ................................................... 40 Table 16: Capacity and dead storage summary table ...................................................... 42 Table 17: Summary of river channel storage calculation components .............................. 43 Table 18: Components for backcalculation of inflow......................................................... 44 Table 19: Pan factors utilised for calculation .................................................................... 45 Table 20: Summary of gauged tributary inflow 2014-15 ................................................... 47 Table 21: Flow leaving system and replenishment summary 2014-15 ............................. 49 Table 22: Reconciliation of NSW river extraction to NSW account usage ........................ 51 Table 23: Supplementary Announcements 2014-15......................................................... 56 Table 24: Groundwater sources in the Border Rivers ....................................................... 62 Table 25: Border Rivers surface water catchment groundwater sources summary

table ................................................................................................................. 66

Figures Figure 1: Surface water geographical extent of the accounts ............................................ 4 Figure 2: Rainfall data and 2014-15 vs historical mean deviations at Pindari and

Mungindi ............................................................................................................ 5 Figure 3: Border Rivers 2014-15 total annual rainfall ......................................................... 6 Figure 4: Border Rivers average annual rainfall, 1961 - 1990 ............................................ 6 Figure 5: Long-term inflows to Glenlyon Dam against mean and 2014-15 inflow ............... 7 Figure 6: Daily inflows and rainfall at Glenlyon Dam 2014-15 ............................................ 7 Figure 7: Glenlyon Dam volume and percentage 2014-15 ................................................. 8 Figure 8: Long-term inflows to Pindari Dam against mean and 2014-15 inflow .................. 8 Figure 9: Daily inflows and rainfall at Pindari Dam 2014-15 ............................................... 8 Figure 10: Pindari Dam volume and percentage 2014-15 ................................................... 9 Figure 11: 2014-15 Total daily flow - Macintyre River at Boggabilla .................................... 9 Figure 12: Water Availability (AWD plus carry over) .......................................................... 10


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Figure 13: Total usage since the commencement of the Water Sharing Plan against entitlement (excluding supplementary) ............................................................. 11

Figure 14: Total supplementary usage since the commencement of the Water Sharing Plan against entitlement ...................................................................... 11

Figure 15: Net trade out of the NSW Border Rivers (excluding supplementary) ................ 12 Figure 16: NSW Border Rivers trade market statistics ....................................................... 12 Figure 17: Held environmental water share component in the NSW Border Rivers

(excluding supplementary) ............................................................................... 13 Figure 18: Held environmental usage ................................................................................ 14 Figure 19: Pindari releases including periods of environmental stimulus release .............. 14 Figure 20: Pindari releases against water sharing plan transparent and minimum

flow requirements ............................................................................................. 14 Figure 21: End of system flow for Border Rivers Regulated River 2014-15 ....................... 50 Figure 22: Boomi River replenishment flows 2014-15 ....................................................... 50 Figure 23: Storage releases Glenlyon Dam 2014-15 ......................................................... 53 Figure 24: Storage releases for Pindari Dam 2014-15 ....................................................... 53 Figure 25: Border Rivers 2014-15 supplementary usage by river section .......................... 58 Figure 26: Border Rivers total daily supplementary water extractions 2014-15.................. 58 Figure 27: Border Rivers Surface Water Catchment – Groundwater Water Sharing

Plans ................................................................................................................ 64 Figure 28: Border rivers catchment annual potential recharge (1970-71 to 2014-15) ........ 68 Figure 29: 2014-15 Potential recharge deviation from long term mean ............................. 68


v | DPI Water, April 2016

Abbreviations Acronym Description

AWAS 1 Australian Water Accounting Standard

AWD Available Water Determination

BoM Bureau of Meteorology

CAIRO Computer Aided Improvements to River Operations

GIS Geographic Information System

GPWAR General Purpose Water Accounting Report

IQQM Integrated Quantity and Quality Model

MDBA Murray-Darling Basin Authority

ML Megalitres (1,000,000 litres)

MODFLOW Modular Three Dimensional Finite-Difference Groundwater Flow Model

DPI Water Department of Primary Industries, Water

NSW New South Wales

QLD Queensland

WAS Water Accounting System (Water Management Act 2000)

WASB Water Accounting Standards Board


vi | DPI Water, April 2016

Glossary

Allocation The specific volume of water allocated to water allocation accounts in a given season, defined according to rules established in the relevant water plan.

Allocation assignments The transfer of water between licence holder allocation accounts as a result of a trade agreement. The assignment becomes part of the receiver’s current year allocation account water.

Allocation Account Water account attached to an access licence used to track the balance of account water.

Aquifer Soil or rock below the land surface that is saturated with water. A confined aquifer has layers of impermeable material above and below it and is under pressure. When the aquifer is penetrated by a well, the water rises above the top of the aquifer. In an unconfined aquifer, the upper water surface (water table) is at atmospheric pressure and thus is able to rise and fall.

Available Water Determination (AWD)

The process by which water is made available for use and shared amongst water users who hold a water access licence. It determines the volume of water that is to be added to an individuals licence allocation account.

Australian Water Accounting Standard (AWAS 1)

A national standard that prescribes the basis for preparing and presenting a General Purpose Water Accounting Report (GPWAR). It sets out requirements for the recognition, quantification, presentation and disclosure of items in a GPWAR.

Back-calculation A calculation approach using a mass balance to determine an unknown variable (used to calculate storage inflows based on balancing the change in storage volume where inflow is the only unknown).

Basic rights The non-licensed right to extract water to meet basic requirements for household purposes (non-commercial uses in and around the house and garden) and for watering of stock. It is available for anyone who has access to river frontage on their property.

Computer Aided Improvements to River Operations (CAIRO)

A spreadsheet-based water balance model used for optimising river operations (orders and releases)

Carryover The volume or share component that may be reserved by a licence holder for use in the proceeding year.

Catchment The areas of land which collect rainfall and contribute to surface water (streams, rivers, wetlands) or to ground-water. A catchment is a natural drainage area, bounded by sloping ground, hills or mountains, from which water flows to a low point.

Conveyance licence Defined licence category that provides an allowance for losses in the delivery of water.

Dead storage The volume in storage that is generally considered unavailable for use (e.g water level below release valves) due to access and often poor water quality.

Dealings A water dealing refers to a change that can be made to a licence, in particular, those arising from trading including the sale of all or part of an access licence or account water. May also include a change in location, licence category or consolidation/subdivision of licences.

Double entry accounting Double-entry accounting is a method of record-keeping that records both where money (or in this case water) comes from and where it goes. Using double-entry means that water is never gained or lost - it is always transferred from somewhere (a source account) to somewhere else (a destination account).

Effective storage The total volume of storage minus the dead storage component – the volume generally considered as useable.

Effluent Flow leaving a place or process. Sewage effluent refers to the flow leaving a sewage treatment plant. An effluent stream is one which leaves the main river and does not return.

Entity A defined geographical area or zone within the accounting region. Transactions and reports are produced for each entity.


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End of system The last defined point in a catchment where water information can be measured and/or reported.

Environmental water Water allocated to support environmental outcomes and other public benefits. Environmental water provisions recognise the environmental water requirements and are based on environmental, social and economic considerations, including existing user rights.

Equity Total assets minus total liabilities

Evaporation The process by which water or another liquid becomes a gas. Water from land areas, bodies of water, and all other moist surfaces is absorbed into the atmosphere as a vapour.

Evapotranspiration The process by which water is transmitted as a vapour to the atmosphere as the result of evaporation from any surface and transpiration from plants.

Extraction The pumping or diverting of water from a river or aquifer by licensed users for a specific purpose (irrigation, stock, domestic, towns, etc). The volume is measured at the point of extraction or diversion (river pump, diversion works etc).

General Purpose Water Accounting Report (GPWAR)

A report prepared according to the Australian Water Accounting Standard. It is comprised of a number of components including a contextual statement, a Statement of Water Assets and Water Liabilities, a Statement of Change in Water Assets and Water Liabilities, a Statement of Physical Water Flows, Notes and Disclosures, and an assurance and accountability statement

General security licence A category of water access licence implemented under the Water Management Act 2000. Forms the bulk of the water access licence entitlement volume in NSW and is a low priority entitlement i.e. only receives water once essential and high security entitlements are met in the available water determination process.

Groundwater Water location beneath the ground in soil pore spaces and in the fractures of rock formations.

High security licence A category of licence water access licence implemented under the Water Management Act 2000. Receives a higher priority than general security licences but less priority than essential requirements in the available water determination process.

HYDSTRA database A database used by DPI Water to store continuous time series data such as river flow, river height, and water quality.

Inflows Surface water runoff and deep drainage to groundwater (groundwater recharge) and transfers into the water system (both surface and groundwater) for a defined area.

Inter-valley trade Trade of licence holder allocation account water, via allocation assignment, from one catchment to another catchment (or state).

Intra-valley trade Trade of licence holder allocation account water, via allocation assignment, within the same catchment.

Licence Administration System (LAS)

The system used by DPI Water to manage water access licence information and transaction.

Liability A legally binding obligation to settle a debt.

Median The middle point of a distribution, separating the highest half of a sample from the lowest half.

Non-physical transaction An accounting transaction representing a process that is not a component of the water cycle (e.g. an available water determination).

Physical transaction An accounting transaction representing a process of the water cycle (e.g. a extraction)

Recharge Groundwater recharge is a hydrologic process where water drains downward from surface water to groundwater. Groundwater is recharged naturally by rain, floods and snow melt and to a smaller extent by drainage directly from surface water (such as rivers and lakes).

Regulated river A river system where flow is controlled via one or more major man-made structures e.g. dams and weirs. For the purposes of the Water Management Act 2000 a

http://en.wikipedia.org/wiki/Hydrology

http://en.wikipedia.org/wiki/Water

http://en.wikipedia.org/wiki/Surface_water

http://en.wikipedia.org/wiki/Groundwater

http://en.wikipedia.org/wiki/Rain

http://en.wikipedia.org/wiki/Snow


viii | DPI Water, April 2016

regulated river is one that is declared by the Minister to be a regulated river. Within a regulated river system licence holders can order water against a held entitlement.

Replenishment flows Flows provided along effluent systems downstream of a water source to supply water for household, town use and stock.

Return inflows Water that has been diverted from a river by a water user and is then returned to the river after use (e.g. can include non-consumptive uses, such as hydropower, cooling water for industry or water for aquaculture). This water is included as an inflow to the basin because the water is available to be diverted downstream or will pass the basin outlet.

Share component An entitlement to water specified on the access licence, expressed as a unit share or in the case of specific purpose licences (eg. local water utility, major water utility and domestic and stock) a volume in megalitres. The amount of water a licence holder is allocated as a result of an available water determination and the amount they can take in any year is based on their share component.

Steady State A condition in a physical groundwater system where the volume does not change over time, or in which any one change in volume is continually balanced by another.

Storage A state-owned dam, weir or other structure which is used to regulate and manage river flows in the catchment and the water bodies impounded by these structures.

Storage discharge The volume of water released from storage in a specified time frame.

Storage reserve Proportion of water in a storage reserved in the resource assessment process for future essential or high security requirements (e.g. town water).

Storage volume The total volume of water held in storage at a specified time.

Supplementary water Unregulated river flow available for extraction under a supplementary licence.

Surface water All water that occurs naturally above ground including rivers, lakes, reservoirs, creeks, wetlands and estuaries.

Translucent flow The release of an agreed percentage of an incoming flow event from a dam for environmental purposes immediately downstream of the dam.

Transparent flow The release of all or part of an incoming flow event from a dam for environmental purposes at one or more sites downstream of the dam.

Tributary A smaller river or stream that flows into a larger river or stream. Usually a number of smaller tributaries merge to form a river.

Uncontrolled flow Water permitted to be extracted without debt under a general security access licence during a supplementary flow event. The extracted water may be progressively debited to the general security account if water availability exceeds predefined levels.

Ungauged catchment A catchment without a flow gauge to accurately record stream flows. Modelled estimates must be used to approximate the contribution of ungauged catchments to the main river.

Water accounting The systematic process of identifying, recognising, quantifying, reporting, assuring and publishing information about water, the rights or other claims to that water, and the obligations against that water

Water assets The physical water held in storage, as well as any claims to water that are expected to increase the future water resource (e.g. external water entering the system through intervalley trading).

Water liabilities Claims on the water assets of the water report entity including water that has been allocated to licence holder accounts or environmental accounts but yet to be taken at the end of the reporting period.

Water sharing plan A water management plan that defines the rules for sharing of water within a region under the Water Management Act 2000.


2 | DPI Water, April 2016

Introduction This document is a General Purpose Water Accounting Report (GPWAR) for the New South Wales (NSW) Border Rivers Regulated River Water Source, prepared by the New South Wales Department of Primary Industries Water (DPI Water) under the Australian Water Accounting Standard 1 (AWAS 1) (WASB, 2012).

It has been prepared for the reporting period of 1 July to 2014 to 30 June 2015 and aims to provide a consolidated and informative annual summary of the available water resources and the water resource management that occurred for this period.

The GPWAR consists of:

- A contextual statement, summarising the climatic conditions, water resources, and water resource management in 2014-15.

- A physical flow diagram, illustrating changes in storage volumes and the associated inflows and outflows.

- Water accounting statements presenting the opening and closing balances, and itemised changes to these balances for available water resources (water assets) and licenced allocation accounts (water liabilities).

- Disclosure notes (linked to the figures within the water accounting statements) providing detailed information of accounting components such as planned and held environmental water, available water determinations, temporary trading, supplementary announcements, allocation account balances, and physical flows.

While groundwater has not been directly included in the GPWAR (aside from those processes that directly interact with the regulated river), annual summary information on physical groundwater flows, and the management of groundwater resources in the NSW Border Rivers catchment is provided as an appendix to this document.

As Director Water Information and Insights, DPI Water, I hereby declare:

• The information presented in these accounts as a faithful representation of the management and operation of the NSW Border Rivers Regulated River Water Source in 2014-2015.

• All data presented in this report is based on the best available information at the time of publication.

• DPI Water has to the best of its ability prepared this GPWAR in accordance with the Australian Water Accounting Standard 1.

Dr Christobel Ferguson

Director Water Information and Insights

DPI Water



Contextual Statement The Border Rivers consists of the catchments of the Dumaresq, Severn, Macintyre and Barwon Rivers which drain from the Great Dividing Range between Inverell in far northern New South Wales (NSW) and Warrenbayne in Southern Queensland. The catchment occupies an area of approximately 49,500 square kilometres of which approximately 24,500 square kilometres are situated within NSW. The Dumaresq River, Macintyre River and part of the Barwon River downstream of the Weir River form the border between NSW and Queensland for approximately 470 kilometres.

The Border Rivers are regulated by three dams – Glenlyon Dam on Pikes Creek (QLD), Coolmunda Dam on Macintyre Brook (QLD), and Pindari Dam on the Severn River (NSW). The main tributaries draining from Queensland are Pikes Creek and Macintyre Brook which enter the Dumaresq River, and the Weir River which enters the Macintyre River. The lower end of the catchment is characterised by a complex series of anabranching channels. The junction of the Weir and Macintyre Rivers marks the start of the Barwon River, and the town of Mungundi on the Barwon River marks the downstream end of the Border Rivers catchment.

The catchment supports a population of around 50,000 people. In NSW the population is concentrated in the major centres of Glen Innes, Inverell, and Tenterfield which support around 30,000 people between the three local government areas. The largest towns in the Queensland part of the catchment are Goondiwindi and Stanthorpe which both have populations of around 5,000 people. The Border Rivers flows through lands previously occupied by the Kamilaroi and Bigambul Aboriginal people.

The main agricultural use of land is for grazing and dryland cropping, and this covers around ninety per cent of the catchment. Irrigation for the production of cotton occurs on the western plains between Goondiwindi and Mungindi.

A more detailed description of the catchment can be found in the document Water resources and management overview – Border Rivers catchment which is available from the DPI Water website.

Accounting Extent The accounted river extent for this General Purpose Water Accounting Report (GPWAR) is illustrated in Figure 1 and includes the area managed by the Water Sharing Plan for the New South Wales Border Rivers Regulated River Water Source.

The GPWAR considers the water resources and associated water users on the Severn River from Pindari Dam to its junction with the Macintyre River, the Dumeresq River from Glenlyon Dam to the junction with the Macintyre River, and the Macintyre River downstream to Mungindi.

The gauged inflow reported consists of inflow from Macintyre Brook, The Mole River, Frazers Creek, Weir River, Tenterfield Creek, Beardy River and Macintyre River (the unregulated component upstream of the junction with the Severn River).

As this GPWAR is an account for the NSW Border Rivers, only Pindari and Glenlyon storage volumes are included as major storage assets. Flow exiting the Macintyre Brook (regulated by Coolmunda Dam) is treated as an inflow to the NSW Border Rivers. The Coolmunda system itself is not a NSW resource and is therefore excluded.

Groundwater volumes interacting with the regulated river are indirectly included in the GPWAR statements (they form part of the unaccounted difference required to balance the river storage). Other groundwater flows and groundwater management are excluded from the GPWAR, however supporting information for groundwater within the NSW Border Rivers catchment (for 2014-15) has been presented in Appendix 1 of this document.


Figure 1: Surface water geographical extent of the accounts



Climate The Border Rivers experienced average to below average conditions during 2014-15. Rainfall was generally below average for the first 5 months of the season (July to November), followed by a series of wetter months into the summer and autumn (Figure 2).

In the upper catchment at Pindari Dam, total annual (July to June) rainfall was 740 mm (one per cent above the long term average for this location). In the lower extent of the catchment represented by Mungindi total rainfall was 461 mm (10 per cent below the long term average for this location) (Table 1).

The 2014-15 spatial distribution across the NSW Border Rivers is displayed in Figure 3, and can be referenced against the mean annual rainfall distribution in Figure 4. A declining trend in rainfall compared to average rainfall, east to west is evident. Figure 2: Rainfall data and 2014-15 vs historical mean deviations at Pindari and Mungindi

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Table 1: 2014-15 monthly rainfall and historic monthly data at Pindari and Mungindi1 Month Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Annual Pindari 2014-15 12.4 48.7 13.5 8.4 32.4 146.8 134.2 74.9 67.5 120.0 46.3 35.2 740.3 Historic statistics Mean 43.0 36.1 47.7 64.5 88.9 93.0 93.6 81.4 63.8 44.9 43.3 38.2 732.8 Median 33.5 31.4 44.4 53.2 88.0 97.0 80.2 74.8 50.0 39.3 34.7 34.9 737.0 Lowest 1.8 0.0 0.4 8.4 3.0 5.8 10.4 12.4 1.1 0.0 1.0 0.0 506.6 Highest 152.2 98.6 146.0 175.8 245.6 186.4 283.7 248.8 235.2 216.4 169.6 108.6 1,012.8 Highest Year 1998 1987 1996 1975 2000 2004 1978 1976 1975 1988 1983 1981 2010-2011 Month Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Annual Mungindi 2014-15 4.8 21.3 32.7 0.0 9.6 104.8 88.0 7.4 40.2 57.5 13.6 81.7 461.6 Historic statistics Mean 33.1 25.2 27.1 37.8 46.1 52.2 70.7 63.2 51.1 30.7 34.5 34.0 506.0 Median 22.5 18.6 20.0 30.5 33.4 40.1 47.8 42.0 34.8 18.6 26.3 29.0 473.1 Lowest 0.0 0.0 0.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0 0.0 0.0 165.0 Highest 257.2 146.8 148.5 197.7 256.6 191.9 406.2 366.0 274.5 251.0 170.0 118.4 990.8 Highest Year 1950 1966 1906 1969 2000 1942 1974 1976 1894 1988 1983 1930 1889-1890

1 Long term statistics are derived from the Bureau of Meteorology – climate data online. The data presented is collected from the stations ‘54104 – Pindari Dam’ and ‘52020 – Mungindi Post Office’. Historic statistics uses data from 1971 to 2015 for Pindari and 1887 to 2015 for Mungindi



Figure 3: Border Rivers 2014-15 total annual rainfall

Figure 4: Border Rivers average annual rainfall, 1961 - 1990

Data source: Australian Bureau of Meteorology



Dam inflows and volume Inflows to the major storages were extremely low in 2014-15, with 19,288 megalitres of inflow to Glenlyon Dam (Figure 5) and 64,273 megalitres to Pindari Dam (Figure 8), both being well below mean inflows for these storages. While rainfall was approximately average, to slightly below average in the storage catchment areas, the dry conditions of the previous 3-4 years, inhibited significant runoff volumes from the landscape. Daily distributions of inflow are provided in Figure 6 and Figure 9, for Glenlyon and Pindari respectively and indicate the majority of inflow arriving to the storages throughout summer and autumn.

Glenlyon Dam commenced the year at 38 per cent of full capacity volume and finished at 30 per cent (Figure 7), while Pindari Dam commenced the year at 17 per cent of full capacity volume, and increased to 26 per cent, predominately due to a moderate April 2015 inflow event (Figure 10). Figure 5: Long-term inflows to Glenlyon Dam against mean and 2014-15 inflow

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Figure 6: Daily inflows and rainfall at Glenlyon Dam 2014-15

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Figure 7: Glenlyon Dam volume and percentage 2014-15

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Long Term Inflow 2014-15 inflow ( 64,273 ML) Mean inflow ( 174,531 ML)

Figure 9: Daily inflows and rainfall at Pindari Dam 2014-15

0

10

20

30

40

50

60

70

0

2,000

4,000

6,000

8,000

10,000

12,000

14,000

16,000

1-Ju

l-14

1-Au

g-14

1-Se

p-14

1-O

ct-1

4

1-N

ov-1

4

1-De

c-14

1-Ja

n-15

1-Fe

b-15

1-M

ar-1

5

1-Ap

r-15

1-M

ay-1

5

1-Ju

n-15

1-Ju

l-15

Rain

fall (

mm

)

Flow

(ML/

d)

Rainfall at Pindari Dam (mm) Pindari Daily Inflows (ML)



Figure 10: Pindari Dam volume and percentage 2014-15

10%

20%

30%

40%

50%

60%

70%

30

50

70

90

110

130

150

170

190

210

230

1-Ju

l-14

1-Au

g-14

1-Se

p-14

1-O

ct-1

4

1-N

ov-1

4

1-D

ec-1

4

1-Ja

n-15

1-Fe

b-15

1-M

ar-1

5

1-Ap

r-15

1-M

ay-1

5

1-Ju

n-15

1-Ju

l-15

Volu

me

(ML x

100

0)

Stor

age

per c

ent f

ull

52,478ML (17%)

81,452ML (26%)

Major high flow events There were no major high flow events in the Border Rivers in 2014-15. Moderate flows passed through the system in January 2015 and April 2015 however both events remained within the river channel and there were no episodes of flood conditions (Figure 11). Figure 11: 2014-15 Total daily flow - Macintyre River at Boggabilla

0

2

4

6

8

10

12

14

1-Ju

l-201

4

1-Au

g-20

14

1-Se

p-20

14

1-O

ct-2

014

1-N

ov-2

014

1-De

c-20

14

1-Ja

n-20

15

1-Fe

b-20

15

1-M

ar-2

015

1-Ap

r-20

15

1-M

ay-2

015

1-Ju

n-20

15

1-Ju

l-201

5

Heig

ht (m

)

Maximum daily height (m) Minor flooding Moderate flooding Major flooding

Macintyre River at Boggabilla

Surface water resources and management The NSW Border Rivers water source was managed under the conditions set out in the Water Sharing Plan for the NSW Border Rivers Regulated River Water Source 2009, for the entirety of 2014-15. The licence allocation accounting rules that were in place are summarised in Table 2.



Table 2: Water Allocation Licence Accounting Rules 2014-15

Licence Category Account

Limit Carryover

Limit Annual Use

Limit Maximum

AWD DOMESTIC AND STOCK 100% 0% N/A 100% DOMESTIC AND STOCK[DOMESTIC] 100% 0% N/A 100% DOMESTIC AND STOCK[STOCK] 100% 0% N/A 100%

LOCAL WATER UTILITY 100% 0% N/A 100% REGULATED RIVER (GENERAL SECURITY A) 1 ML/Share 1 ML/Share 1 ML/Share 1 ML/Share REGULATED RIVER (GENERAL SECURITY B) 1 ML/Share 1 ML/Share 1 ML/Share N/A REGULATED RIVER (HIGH SECURITY) 1 ML/Share 0 ML/Share N/A 1 ML/Share

SUPPLEMENTARY WATER N/A 0 ML/Share N/A 1 ML/share

Water availability (carryover plus annual available water determinations), was the lowest since the commencement of the water sharing plan (Figure 12). General Security B licence holders, which represent the largest component of issued share in the NSW Border Rivers, were limited to 16 per cent water availability (relative to total entitlement issued for this category). All other categories of licence had 100 per cent availability for 2014-15. The total issued share component in the water source remained steady.

Low water availability corresponded to declining total account usage (excluding supplementary diversions) which was also the lowest since the water sharing plan commenced with 37,816 debited to accounts (Figure 13). Additionally, supplementary usage was the lowest within the 6 years of the water sharing plan being in operation (Figure 14). This can be attributed to limited availability of runoff events downstream of the major storages, and unregulated excess flows being diverted to the Boomi River for replenishments and other user commitments.

A net volume of 1,102 megalitres was moved from the NSW Regulated Border Rivers water source to Queensland holders, through allocation assignments (temporary account water trading). Movement of water from NSW to QLD has been the dominant trade direction since commencement of the water sharing plan (Figure 15). The average price per megalitre of water remained steady at $198 per megalitre (Figure 16). Figure 12: Water Availability (AWD plus carry over)

0

20

40

60

80

100

120

140

160

2009-10 2010-11 2011-12 2012-13 2013-14 2014-15

Wat

er A

vaila

bilit

y (%

of E

ntitl

emen

t)

Domestic and Stock General Security A General Security B High Security Local Water Utility



Figure 13: Total usage since the commencement of the Water Sharing Plan against entitlement (excluding supplementary)

0

20,000

40,000

60,000

80,000

100,000

120,000

140,000

160,000

180,000

2009-10 2010-11 2011-12 2012-13 2013-14 2014-15

Usa

ge (M

L)

General Security A Domestic and Stock General Security B High Security Local Water Utility

266,300

266,350

266,400

266,450

2009-10 2010-11 2011-12 2012-13 2013-14 2014-15

Shar

e Co

mpo

nent

Figure 14: Total supplementary usage since the commencement of the Water Sharing Plan against

entitlement

0

20,000

40,000

60,000

80,000

100,000

120,000

140,000

2009-10 2010-11 2011-12 2012-13 2013-14 2014-15

Supp

lem

enta

ry V

olum

e (M

L)

Share Component Supplementary Account Usage



Figure 15: Net trade out of the NSW Border Rivers (excluding supplementary)

0

10,000

20,000

30,000

40,000

50,000

60,000

2009-10 2010-11 2011-12 2012-13 2013-14 2014-15

Allo

catio

n As

sign

men

ts (M

L)Assignments In Assignments Out Net Assignments out of Border Rivers

Figure 16: NSW Border Rivers trade market statistics2

0

10

20

30

40

50

60

70

80

0

50

100

150

200

250

300

350

2009-10 2010-11 2011-12 2012-13 2013-14 2014-15

Num

ber o

f tra

des

Pric

e pe

r meg

alitr

e ($

AU)

Average of price per ML ($) Max of price per ML ($) Number of trades

0

500

1,000

1,500

2,000

2009-10 2010-11 2011-12 2012-13 2013-14 2014-15

Trad

e va

lue

($ *

000) Trade Value (megalitres x $)

2 Trade analysis excludes allocation assignments where price per megalitre of water is less than 10 dollars per megalitre. This is to remove those trades that are not representative of the true market value due to being between the same holder, family members, between environmental licences or from environmental licences to consumptive licences for environmental delivery.



Environmental water Held environmental entitlement remained at 420 unit shares of General Security B. A ‘General Security A’ category of licence and a ‘High Security’ category of licence, both of zero share components, is also held by environmental holders. These licences can be used to trade water on the temporary market.

No held environmental water was used in 2014-15 (Figure 18).

The environmental stimulus flow account was credited with 4,000 ML at the beginning of the 2014-15 season. The triggers to release the stimulus flow did not occur however and the volume has been carried forward to the 2015-16 season (Figure 19). See Note 8 of this document for full account summary of the environmental stimulus account.

Minimum flow requirements from Pindari dam (10 megalitres per day) were met at all times during the year (Figure 20). Taken on a monthly basis, transparent releases were met or exceeded throughout 2014/15. Daily variances against the target were evident on a number of occasions, however overall transparent releases exceeded the required transparent releases. Further information on storage releases and transparent releases is located in Note 19. Figure 17: Held environmental water share component in the NSW Border Rivers (excluding

supplementary)3

0

50

100

150

200

250

300

350

400

450

2009-10 2010-11 2011-12 2012-13 2013-14 2014-15

Wat

er S

hare

Com

pone

nt (M

L)

General Security A General Security B High Security

3 A licence with zero share component in General Security A and High Security has been held since 2010-11



Figure 18: Held environmental usage

0

50

100

150

200

250

300

2009-10 2010-11 2011-12 2012-13 2013-14 2014-15

Acco

unt U

sage

(ML)

General Security A General Security B High Security

Figure 19: Pindari releases including periods of environmental stimulus release

0

200

400

600

800

1,000

1,200

1-Ju

l-14

1-Au

g-14

1-Se

p-14

1-O

ct-1

4

1-N

ov-1

4

1-De

c-14

1-Ja

n-15

1-Fe

b-15

1-M

ar-1

5

1-Ap

r-15

1-M

ay-1

5

1-Ju

n-15

1-Ju

l-15

Rele

ase

(ML/

d)

Pindari Dam releases (ML)Period of additional releases from environmental s timulus account and held environmental water

Figure 20: Pindari releases against water sharing plan transparent and minimum flow requirements

0

50

100

150

200

250

1-Ju

l-14

1-Au

g-14

1-Se

p-14

1-O

ct-1

4

1-N

ov-1

4

1-De

c-14

1-Ja

n-15

1-Fe

b-15

1-M

ar-1

5

1-Ap

r-15

1-M

ay-1

5

1-Ju

n-15

1-Ju

l-15

Rele

ase

(ML/

d)

Pindari release/spill minimum (10 ML/day) required transparent release



Water Accounting Statements



Significant water accounting policies The water accounting statements in this GPWAR have been prepared using an accrual basis of accounting. All figures are in megalitres (ML).

The ‘Statement of Physical Flows’ has been excluded for this GPWAR as all transactions have been presented in the statements ‘Water Assets and Liabilities’ and ‘Changes in Water Assets and Water Liabilities’.

The provision of a ‘Physical Flow Diagram’ that represents the physical movements of water has been included in order to provide a clearer picture of this process.

For generic information on how to interpret the DPI Water GPWAR statements refer to the Guide to General Purpose Water Accounting Reports available for download on from the DPI Water website.

Quantification of data Data accuracy It is important to recognise that the data used to account for water movement and management in the reporting entity has been obtained from a variety of sources and systems. The data ranges from observed values where a high accuracy would be anticipated through to modelled results and estimates where accuracy can be highly variable depending on a range of factors. To address the inconsistencies in accuracy and prevent misuse of the data in the accounts, all figures in the water accounting statements will be accompanied by an assessment of accuracy (Table 3). Table 3: Water account data accuracy estimates key

Accuracy Description

A14 +/- 0%

A +/- 10%

B +/- 25%

C +/- 50%

D +/- 100%

4 Non-physical administration items, such as available water determinations, trading and carryover volumes are assumed to have no inherent error for the purposes of this report. Items are reported as extracted from the DPI Water corporate database.

http://www.water.nsw.gov.au/




Border Rivers catchment: Physical flows mass balance diagram 2014-15

End of System

95,358

Boomi River Offtake

21,834

Evaporation

16,113

26,312Release Inflow

19,288Rainfall

4,233

30/06/14 95,60630/06/15 76,702Change: (18,904)

Glenlyon Dam

Macintyre River 30/06/14 38630/06/15 391 Change: 5

River Inflows

Rainfall: 9,691Gauged Inflow: 151,214

Ungauged Inflow: 63,000Inflow from McIntyre Brook Regulated System: 19,863

Evaporation: 25,521NSW Extractions: 39,659QLD Extractions: 39,502NSW Basic Rights: 8,000

River Outflows

Unaccounted difference

71,620

Severn River

Dumaresq River

30/06/14 2,41930/06/15 2,418

Change: (1)

Boggabilla WeirRainfall

Evaporation

5,553Inflow 64,273

2,420

Release

32,171

30/06/14 52,48330/06/15 81,452

Change: 28,969

Pindari Dam

Inflow to Mcintyre River32,209

All figures in megalitres

Weir

Major Storage

Outflow

Inflow

123 Denotes negative



Border Rivers catchment Water Assets and Water Liabilities For the year ended 30 June 2015

SURFACE WATER ASSETS

1. Surface Water Storage Accuracy Notes 30-June-15 30-Jun-14 Glenlyon Dam A 10 76,702 95,606 Pindari Dam A 10 81,452 52,483 Boggabilla Weir A 10 2,418 2,419 River B 11 391 386

Total Surface Water Storage (Asws) 150,894 435,985 Change in Surface Water Storage 10,069 (285,091)

SURFACE WATER LIABILITIES 2. Allocation Account Balance Accuracy Notes 30-June-15 30-Jun-14

Domestic And Stock A1 1 0 0 Domestic And Stock[Domestic] A1 1 0 0 Domestic And Stock[Stock] A1 1 0 0 Local Water Utility A1 1 0 0 Regulated River (General Security A) A1 1 3,929 691 Regulated River (General Security B) A1 1 20,414 34,534 Regulated River (High Security) A1 1 (1) -9

Total Allocation Account Balance (Lsws) 24,341 35,217

Change in Allocation Account Balance (10,876) (152,536)

3. Environmental Stimulus Flow Account Balance Accuracy Notes 30-June-15 30-Jun-14

Stimulus Flow Account (Lesf) A1 8 4,000 0

Change in Environmental Stimulus Flow Account Balance 4,000 0

NET SURFACE WATER ASSETS

Net Surface Water Assets (Asws-Lsws-Lesf) 132,622 115,677 Change in Net Surface Water Assets 16,945 (132,555)

Groundwater Assets and Groundwater Liabilities Groundwater has not been specifically included in this GPWAR. Summary information relating to groundwater resources and management in 2014-15 is available in appendix 1.



Border Rivers catchment Changes in Water Assets and Water Liabilities For the year ended 30 June 2015 (1 of 3) 1. Changes in Surface Water Storage (Physical Water Balance)

Surface Water Storage Increases Accuracy Notes 2014-15 2013-14 Glenlyon Dam

Inflow A 12 19,288 11,331 Rainfall B 13 4,233 6,398

Pindari Dam Inflow A 12 64,273 39,778 Rainfall B 13 2,420 2,747

River Rainfall B 13 9,691 7,197 Inflow from Releases A 19 58,483 307,090 Gauged Inflow A 15

Inflow from Macintyre Brook regulated system 19,863 25,127 Inflow to Macintyre River 32,209 10,461 Other Gauged Inflow 151,214 57,484

Ungauged Inflow C 16 63,000 22,629

Total Surface Water Storage Increases (Isws) 391,712 490,243

Surface Water Decreases Accuracy Notes 2014-15 2013-14 Glenlyon Dam

Releases A 19 26,312 125,875 Evaporation B 13 16,113 25,591

Pindari Dam Releases (Other) A 19 22,037 181,215 Releases (Transparent) A 19 10,134 0 Evaporation B 13 5,553 9,941

River Evaporation C 13 25,521 29,310 Flows Leaving System A 17

Boomi River (Other) 19,707 9,536 Boomi River (Replenishment) 2,127 3,730 End of System 95,358 78,123

Extractions from River NSW A 18 39,659 167,578 QLD Extractions A 20 39,502 82,354

Basic Rights Extractions (NSW) C 6 8,000 8,000 Total Surface Water Storage Decreases (Dsws) 310,023 721,254

Unaccounted Volume (Balancing Item) (Usws) D 22 104,582 54,080

Net Surface Water Storage Inflow (Isws-Dsws-Usws) 10,069 (285,091)



Border Rivers catchment Changes in Water Assets and Water Liabilities For the year ended 30 June 2015 (2 of 3) 2. Changes in allocation account

Allocation Account Increases Accuracy Notes 2014-15 2013-14 Available Water Determinations A1 2

Domestic And Stock 850 850 Domestic And Stock[Domestic] 52 52 Domestic And Stock[Stock] 100 100 Local Water Utility 620 620 Regulated River (General Security A) 21,604 19,759 Regulated River (General Security B) 3,823 12,482 Regulated River (High Security) 1,500 1,500

New Licences A1 1 0 0 Supplementary Water A 21 1,843 7,792 Internal Trade - Buyers A1 5 13,933 19,718 Trade in from QLD A1 5 0 2,450 Account adjustments

Regulated River (General Security B) A1 9 0 (3) Total Allocation Increases (Iaa) 44,325 65,321

Allocation Account Decreases Accuracy Notes 2014-15 2013-14

Account Usage A1 3 Domestic And Stock 704 713 Domestic And Stock[Domestic] 6 3 Domestic And Stock[Stock] 23 39 Local Water Utility 506 580 Regulated River (General Security A) 7,751 15,780 Regulated River (General Security B) 28,407 144,141 Regulated River (High Security) 419 391 Supplementary Water 1,843 7,792

Account Forfeiture A1 1 Domestic And Stock 146 137 Domestic And Stock[Domestic] 46 49 Domestic And Stock[Stock] 77 62 Local Water Utility 114 70 Regulated River (General Security A) 17 0 Regulated River (General Security B) 4 3 Regulated River (High Security) 50 50

Water Ordering Debiting (Orders > Usage) A1 4 Regulated River (General Security A) 28 0 Regulated River (General Security B) 25 302

Licences Cancelled A1 1 0 0 Internal Trade - Sellers A1 5 13,933 19,718 Trade out to QLD A1 5 1,102 28,028

Trade Allocation Account Decreases (Daa) 55,200 217,857

Net Allocation Account Balance Increase (Iaa - Daa) (10,876) (152,536)



Border Rivers catchment Changes in Water Assets and Water Liabilities For the year ended 30 June 2015 (3 of 3) 3. Change in Environmental Stimulus Flow Account Balance

Environmental Stimulus Flow Account Increases Accuracy Notes 2014-15 2013-14

Start of water year increase (Is) A1 8 4,000 4,000

Environmental Stimulus Flow Account Decreases Accuracy Notes 2014-15 2013-14

Stimulus Account Forfeit A1 8 0 0 Stimulus Account Usage A1 8 0 4,000

Total Environmental Stimulus Flow Account Decreases (Ds) 0 4,000

Net Environmental Stimulus Flow Account Balance Increase 4,000 0

Change in Net Surface Water Assets (Isws - Dsws - Usws - Iaa + Daa - Is +Ds) 16,945 (132,555)



Note disclosures



Reconciliation and future prospect descriptions

Reconciliation of change in net water asset to net change in physical water storage

2014-15 2013-145

ML ML

CHANGE IN NET SURFACE WATER ASSETS 16,945 (132,557)

Non-physical adjustments

Net Increase in Allocation Accounts (10,876) (152,534)

Net Change in Environmental Stimulus Account 4,000 0

NET CHANGE IN PHYSICAL SURFACE WATER STORAGE 10,069 (285,091)

Reconciliation of closing water storage to total surface water assets

30 June 2015 30 June 2014

ML ML

CLOSING WATER STORAGE

Surface Water Storage Pindari 81,452 52,483

Glenlyon 76,702 95,606

Less Glenlyon Qld Share (40,700) (39,300)

Boggabilla Weir 2,418 2,419

River (391) 386

TOTAL SURFACE WATER ASSETS 119,481 111,594

Notes: Figures can be derived from or found directly in the Water Accounting Statements of the General Purpose Water Accounting Report with the exception of the Queensland storage share of Glenlyon Dam.

5 Figures are as reported in the 2013-14 NSW Border Rivers GPWAR and not inclusive of any account adjustments for the 2014-15 accounting



Water assets available to settle water liabilities and future commitments within 12 months of reporting date

(ML) Note (ML)

TOTAL WATER ASSETS AS AT 30 June 2015 (WARP) 119,481

Plus: Water Asset increases within 12months of reporting date (WAI)

Minimum Storage Inflow 0 (a) 0

Less: Water assets not available to be accessed and taken or delivered within 12 months of reporting date. (WANA)

Storage Loss 12,000 (b) Delivery Loss 2015-16 14,300 (c)

Essential Supplies Delivery Loss 10,000 (d) Minimum Storage Release 6,000 (e)

Dead Storage 2,200 10 (44,500)

Water assets available to be accessed and taken or delivered within 12 months of reporting date. 74,981

Less: Water liabilities and future commitments expected to be settled within 12 months of the reporting date.

Water Liabilities expected to be delivered within 12 months of reporting date. (WLE)

Surface Water Carryover 24,341 1 Environmental Stimulus Flow Carryover 4,000 8 (28,341)

Future Commitments expected to be delivered within 12 months of reporting date. (FC)

Indicative Allocations and Basic Rights (f) General Security Increment A 18,098 (g) General Security Increment B 0 (g)

Local Water Utility 620 1 Domestic and Stock 1,002 1

High Security 1,500 1 Environmental Stimulus Flow 4,000 8

Replenishment 10,000 (h) Basic Rights 8,000 6

(43,220)

Surplus of available water assets over water liabilities and future commitments expected to be settled within 12 months of the reporting date. (SWA) SWA = WARP + WAI - WANA - WLE – FC

(i) 3,420

Notes: (a) No minimal inflow sequence is assumed for the continuous accounting used in the Border Rivers (b) This is an estimate of the annual impact of the net effect rainfall and evaporation on the NSW share of storages. (c) This is the volume of water set aside to account for the losses encountered in the delivery of the water liabilities and

future commitments. It is based on the equivalent of 30% of the balance of its consumptive use accounts. (d) This is an allowance for loss set for those periods or areas outside general irrigation releases when essential

requirements are required to be supplied. These essential supplies are provided for a period of 1 year and consist of towns, domestic and stock, high security, basic rights and replenishment seen under indicative allocations and basic rights.

(e) This is the minimum storage release. (f) Indicative Allocation represents a starting allocation 100% for towns, domestic and stock and high security licences. (g) These represent the indicative general security increments at the conclusion of the reporting period to be applied at

commencement of the next period. An increment represents the additional water added to accounts as a result of an available water determination. There are two categories of general security licences in the Borders Rivers general security A and general security B.

(h) Water set aside under the water sharing plan for replenishment flows along the Boomi River to supply households and stock.

(i) Represents the volume of water in transit at the end of the reporting period and is not taken into account until its benefit has been fully realised. It will contribute to future available water determinations.



Note 1 - Allocation accounts This note is reference for the volume held in the allocation accounts at the time of reporting and is also relevant for the various processes that occur to either increase or decrease an allocation account throughout the water year.

The volume of water that is in the licence allocation accounts at the time of reporting is a net balance for the relevant licence category and represents that water that can be carried forward to the next water year as dictated by the carryover rules in place for that year or required under the water sharing plan.

A negative number for the carryover figure indicates that more usage has occurred than has been allocated to the account, and the deficit must be carried forward to the next season.

Water that is in the accounts at the end of a water year but is not permitted to be carried over is forfeited and has been represented as a decrease in water liability.

The accounting presented is relevant to licence category and is therefore inclusive of licences held by environmental holders (these are also detailed separately in Note 7). Data type Derived from measured data Policy Water Sharing Plan for the NSW Border Rivers Regulated River Water Source 2009

Available on the DPI Water website at www.water.nsw.gov.au Data accuracy A1 – Nil inaccuracy +/- 0% Providing agency DPI Water Data source WaterNSW / DPI Water – Water Accounting System (joint ownership) Methodology The carryover volume of water in the allocation account for each licence category is determined once all transactions and end of year forfeit rules have been applied. Below is list of typical transactions that can apply to an allocation account throughout the year:

• Available Water Determination (AWD) (detailed in Note 2) • Allocation account usage (detailed in Note 3) • Over order debits • Forfeiture due to:

o No carryover being permitted (end of year forfeit)

o Allocation account limits

• Licence conversion • Trade of allocation water between accounts (detailed in Note 5) • Carryover rules




Additional information The tables on the following page provide a balanced summary of the water allocation accounts for each category of access licence. Below is a description of each of the table components. All figures are in megalitres Table 4: Explanatory information for allocation account summary

Heading Description

Share This is the total volume of entitlement in the specific licence category on the specified date.

Opening Balance The volume of water that has been carried forward from previous years allocation account.

AWD The total annual volume of water added to the allocation account as a result of allocation assessments.

Licences New Increase in account water as a result of issuing new access licences

Cancelled Decrease in account water as a result of licence cancellation

Assignments In Increase in account water as a result of temporary trade in.

Out Decrease in account water as a result of temporary trade out.

Account Usage Volume of water that is extracted or diverted from the river under controlled river conditions and is accountable against the licence.

Over Order Debit Volume of water ordered that exceeded the recorded usage for corresponding periods which must also be accountable against the licence (excluding supplementary licence holders)

During Year Forfeit Account water forfeited throughout the year as a result of the accounting rules specified in the water sharing plan. Forfeited water may occur due to account limits being reached, conversions between licence categories and various types of other licence dealings.

End of Year Balance Available That part of the remaining account balance that is available to be taken at the conclusion of the water year.

Non Available That part of the remaining account balance that is not available to be taken at the conclusion of the water year.

End of Year Forfeit Account water that is forfeited at the end of the water year as a result of carryover rules that restrict the carry forward volume.

Carry Forward This represents the account water that is permitted to be carried forward into the next water year as determined by the carryover rules.



Table 5: Allocation account balance summary for the NSW regulated Border Rivers 2014-15

Category Share Opening balance AWD

Licences Assignments Account

usage Over order

debit

During year

forfeit

End of year balance End of year

forfeit

Carry forward

New Cancelled In Out Available Not available

Domestic and Stock 850 0 850 0 0 0 0 704 0 0 146 0 146 0

Domestic and Stock [Domestic] 52 0 52 0 0 0 0 6 0 0 46 0 46 0

Domestic and Stock [Stock] 100 0 100 0 0 0 0 23 0 0 77 0 77 0

Local Water Utility 620 0 620 0 0 0 0 506 0 0 114 0 114 0

Regulated River (General Security A) 22,027 691 21,604 0 0 142 10,713 7,751 28 17 3,660 269 0 3,929

Regulated River (General Security B) 241,211 34,534 3,823 0 0 13,791 3,298 28,407 25 4 20,413 1 0 20,414

Regulated River (High Security) 1,500 (9) 1,500 0 0 0 1,023 419 0 0 49 0 50 (1)

Supplementary Water 120,001 0 120,001 0 0 4,379 4,379 1,843 0 0 118,158 0 118,158 0



Note 2 – Available Water Determination (AWD) (allocation announcement) This is the process by which the regulated surface water asset available for use within the regulated system is determined and shared. The process calculates the volume of water that is to be added to an individuals licence allocation account. Announcements of allocations are made on a seasonal basis - usually corresponding with the financial year and are updated on a regular basis or following significant inflow events. Under the Water Management Act 2000 the announcements are termed available water determinations. Data type Derived from measured data. Policy Water Act 1912.

Water Management Act 2000 (NSW).

• Chapter 3 – Part 2 Access Licences. o Clause 59 – Available Water Determinations.

Water Sharing Plan for the Border Rivers Regulated River Water Source 2009.

• Part 8 – Limits to the availability of water o Division 2 – Available Water Determinations.

Available on the DPI Water website at www.water.nsw.gov.au Data accuracy A1 – Nil inaccuracy +/- 0% Providing agency DPI Water Data source WaterNSW / DPI Water – Water Accounting System (Joint ownership of system).

Available Water Determination Register - DPI Water website at www.water.nsw.gov.au Methodology In the Border Rivers Regulated Water Source AWDs are calculated based on a concept of continuous accounting which assesses the resource (water) contained in the headwaters storage, periodically updating projections and distributing the regulated (stored) resource available. All projections are for one year from the date of the assessment. It is important to note that under continuous accounting the AWD’s are based on the actual volume of water in storage at the time of the resource assessment and does not account for sequences of future inflows. However, these future inflows will assist in the delivery of essential requirements beyond the one year.

Each assessment process firstly involves the assessment of the effective storage, being the available storage volume after storage losses are accounted for. This is to account for the fact that storage losses cannot be controlled by a management rule and, therefore, must be provided for first. Following this existing commitments are taken into account and then any uncommitted water is first committed to essential supplies, then added to the delivery loss account to targeting a volume equivalent to a maximum of 30 per cent of the deliverable general security. Water is then allocated to the Environmental Stimulus Flow account. Any remaining uncommitted water is then shared in proportion to the amount of entitlement in the remaining resource categories (general security).

The essential supplies mentioned above consist of items such as stock and domestic requirements, Local Water Utilities (e.g. town water supplies, industrial use), High Security





(permanent plantings e.g. orchards, vineyards), end of system flow requirement resulting from the system operation and minimum storage releases.

The volume of water distributed to licence categories is expressed as either a volume per share or as a percentage of share component depending on the category of licence. The following table details each licence category and how it is announced. Table 6: Access licence category announcement type

Licence Category Announcement Type

General Security Volume per share

High Security Volume per share

Domestic and Stock* Percentage of Share Component

Local Water Utility Percentage of Share Component

Note: Domestic and Stock is further broken down into three sub categories: Domestic and Stock,

Domestic and Stock (Domestic) and Domestic and Stock (Stock).

It should be noted that the AWD for supplementary licence accounts is a separate process and is not dependent on water asset available. It is made once at the start of the year and unless there is a management change due to the growth in use strategy it is maintained at the maximum value prescribed in the plan generally 100 per cent of share component. Therefore it is not considered to create a liability on the system and is only considered in terms of an extraction that reduces the water asset. Additional information The following pages contain the allocation summary reports for 2012-13. Below is a table containing report notes to help interpret the report. Table 7: Allocation Summary Report Notes Allocation Summary Report Notes

Opening Remaining allocation account balances at the conclusion of the previous season that is allowed to be carried forward to this season.

Individual Announcement Actual announcement made to each licence category

Share Component (Entitlement) Sum of the licensed volume of water within the licence category on the announcement date.

Allocation Volume Volume of water credited to accounts within a licence category as a result of the AWD announcement made.

Cumulative Volume Cumulative total of the announced volumes for the water year and licence category.

% of Share Component This is the individual announced volume expressed as a percentage of the share component applicable on the particular date.

Cumulative % of Share Component The total announced volume for the year, expressed as a percentage of the total share component for each licence category applicable on the particular date.

Balance Available Sum of water available in allocation accounts that has been made available to be taken during the season.

Non Available Water allocated that is not accessible at this point in time i.e. considering annual usage limits placed on the accounts as per the water sharing plan

Supplementary Water Water that is not a stored source of water and is only made available if an uncontrolled flow event occurs.



Table 8: 2014-15 NSW regulated Border Rivers allocation announcement summary

NSW BORDER RIVERS REGULATED RIVER WATER SOURCE 01/JUL/2014 - 30/JUN/2015

Date Individual

Announcement Share

Component

Allocation Volume

(ML)

Cumulative Volume

(ML)

Allocation Volume

(%)

Cumulative Volume

(%)

Balance Available

(ML)

Balance Not

Available (ML)

Balance Total (ML)

Balance Available

(%)

Balance Total (%)

DOMESTIC AND STOCK 1-Jul-14 Opening 850 0 0 0 0.0% 0.0% 1-Jul-14 AWD 100.0 % 850 850 850 100.0% 100.0% 850 0 850 100.0% 100.0%

DOMESTIC AND STOCK[DOMESTIC] 1-Jul-14 Opening 52 0 0 0 0.0% 0.0% 1-Jul-14 AWD 100.0 % 52 52 52 100.0% 100.0% 52 0 52 100.0% 100.0%

DOMESTIC AND STOCK[STOCK] 1-Jul-14 Opening 100 0 0 0 0.0% 0.0% 1-Jul-14 AWD 100.0 % 100 100 100 100.0% 100.0% 100 0 100 100.0% 100.0%

LOCAL WATER UTILITY 1-Jul-14 Opening 620 0 0 0 0.0% 0.0% 1-Jul-14 AWD 100.0 % 620 620 620 100.0% 100.0% 620 0 620 100.0% 100.0%

REGULATED RIVER (GENERAL SECURITY A) 1-Jul-14 Opening 22,027 691 0 691 3.1% 3.1% 1-Jul-14 AWD 0.282 ML per Share 22,027 6,082 6,082 27.6% 27.6% 6,773 0 6,773 30.8% 30.8%

9-Feb-15 AWD 0.335 ML per Share 22,027 7,268 13,350 33.0% 60.6% 13,971 71 14,042 63.4% 63.7% 4-Jun-15 AWD 0.383 ML per Share 22,027 8,254 21,604 37.5% 98.1% 22,027 269 22,296 100.0% 101.2%

REGULATED RIVER (GENERAL SECURITY B) 1-Jul-14 Opening 241,211 34,534 0 34,534 14.3% 14.3% 1-Jul-14 AWD 0.0 ML per Share 241,211 0 0 0.0% 0.0% 34,534 0 34,534 14.3% 14.3%

4-Jun-15 AWD 0.0159 ML per Share 241,211 3,823 3,823 1.6% 1.6% 38,356 1 38,357 15.9% 15.9% REGULATED RIVER (HIGH SECURITY)

1-Jul-14 Opening 1,500 (9) 0 (9) (0.6)% (0.6)% 1-Jul-14 AWD 1.0 ML per Share 1,500 1,500 1,500 100.0% 100.0% 1,491 0 1,491 99.4% 99.4%

SUPPLEMENTARY WATER 1-Jul-14 Opening 120,001 0 0 0 0.0% 0.0% 1-Jul-14 AWD 1.0 ML per Share 120,001 120,001 120,001 100.0% 100.0% 120,001 0 120,001 100.0% 100.0%



Note 3 – Allocation account usage This is the volume of water that is extracted, diverted or measured as usage and is accountable against an access licence. This figure excludes that water accounted as over order debit which is accounted for separately (see Note 4). Data type Measured/administration data Policy Not applicable Data accuracy A – Estimated in the range +/- 10% Providing agency DPI Water Data source WaterNSW / DPI Water – Water Accounting System (Joint ownership of system). Methodology Usage information is determined by either on-farm meters that measure extraction, gauges on diversion works or orders/releases when the volume cannot be effectively metered, such as an environmental watering event.

Meter readings are collected for individual licence holders at intervals during the year and converted via a calibration factor to a volume of water extracted. Water diverted from the river is measured by recording the height at either the gauge or weir with the volume diverted being derived by passing these heights through a rating table. However, with multiple categories of access licences being extracted through the same pumps additional information and methodologies are required to separate use under the various licence categories. Below is a description of these:

• Based on periods of announcement – during periods of supplementary water announcements extractions can be debited against the supplementary water licences

• Usage is based on water orders – users place orders for water against an access licence and usages are debited against accounts in proportion to the orders placed.

• Licence category apportionment – if no water orders are available water extracted is apportioned against categories of access licence in order of priority as set out in the table below. The prioritising is based on the nature of and rules around each of the licence categories.

The following table (Table 9) provides the order in which extractions are apportioned to access licence categories starting at priority 1. This is a generic list where not all categories will necessarily appear in this GPWAR. There are also various sub categories of licence associated with some of the categories.



Table 9: Licence category metered usage apportionment table

Priority Surface water

1 Supplementary

2 Uncontrolled Flow

3 Domestic and Stock

4 Regulated River High Security

5 Regulated River General Security

6 Conveyance

7 Local Water Utility

8 Major Water Utility

Table 10: Account usage summary 2014-15

Category Allocation Account usage

Domestic and Stock 704

Domestic and Stock [Domestic] 6

Domestic and Stock [Stock] 23

Local Water Utility 506

Regulated River (General Security A) 7,751

Regulated River (General Security B) 28,407

Regulated River (High Security) 419

Supplementary Water 1,843

Total 39,659



Note 4 – Water order debiting Currently in the NSW Border Rivers regulated river water source the allocation accounts are managed using a water order debiting approach. Accounting under this system requires the accounts to be reduced by the greater of:

• the volume of water extracted • the volume of water ordered for extraction against an access licence

Therefore, the volume appearing in statements against the line item water order debiting reflects the amount of water ordered against a category of licence that is in excess of the physical extraction that occurred. Data type Measured/calculated Policy Water Sharing Plan for the Border Rivers Regulated River Water Source 2009.

• Part 9 – Rules for managing access licences. Division 2 – Water allocation account management.

o Clause 41 – Volume taken under access licences.

Available on the DPI Water website at: www.water.nsw.gov.au. Data accuracy A1 – nil accuracy +/- 0% Providing agency DPI Water Data source WaterNSW / DPI Water – Water accounting system (joint ownership of system). Methodology Over order debiting is a required component of balancing the allocation accounts detailed in Note 1. The over order debit component is calculated by analysing the recorded extractions against orders for the corresponding measurement period. That is, if metered usage is collected monthly then the corresponding monthly orders are compared and any orders that are in excess the usage are recorded as over order debit.



Note 5 - Allocation assignments (temporary trading) This represents the temporary assignment of allocation of water between allocation accounts within the NSW Regulated Border Rivers, or equivalent QLD licences within the Border Rivers. Data type Administration Policy Water Sharing Plan for the NSW Border Rivers Regulated River Water Source 2009

• Part 10 Access licence dealing rules o Clause 48 rules relating to constraints within a water source o Clause 53 Rules for interstate assignment of water allocations

Available on the DPI Water website at www.water.nsw.gov.au Data accuracy A1 – Nil inaccuracy +/- 0% Providing agency DPI Water Data source WaterNSW / DPI Water – Water Accounting System (Joint ownership of system). Methodology Trading of allocation is permitted between certain categories of access licences and between states. This is detailed in the water sharing plan or stipulated under the licence holder’s conditions.

Internal trade within NSW within licence categories results in a net effect of zero for a water year. In order to present the information however, and for the purposes of this GPWAR such trades have been accounted as both a water liability decrease (sellers of water) and a water liability increase (buyers of water). Trades that occur between categories of licence, and between states result in the associated liability being increased or reduced accordingly. Additional information Table 11 shows the allocation assignment figures between licence categories for the Border Rivers. All figures represent a volume in megalitres.




Table 11: 2014-15 allocation assignment summary

Volume of Allocation assignments (ML)

Buyer

Total Queensland Holder Regulated River

(General Security A) Regulated River

(General Security B) Supplementary

Water

Selle

r

Regulated River (General Security A) 233 94 10,386 10,713

Regulated River (General Security B) 529 48 2,721 3,298

Regulated River (High Security) 340 683 1,023

Supplementary Water 4,379 4,379

Total 1,102 142 13,791 4,379 19,414



Note 6 - Basic rights This is the non-licensed right to extract water to meet basic requirements for household purposes (non-commercial uses in and around the house and garden) and for watering of stock. It is available for anyone who has access to river frontage on their property.

This water cannot be used for irrigating crops or garden produce that will be sold or bartered, for washing down machinery sheds or for intensive livestock operations.

In times of limited supply, there may be restrictions on taking water for domestic and stock use. Data Type Estimated Policy Water Sharing Plan for the Border Rivers Regulated River Water Source 2009

• Part 4 Basic Landholder Rights o Clause 15 Domestic and stock rights

Available on the DPI Water website at www.water.nsw.gov.au Data accuracy C – Estimated in the range +/- 50% Providing agency DPI Water Data source Water Sharing Plan for the Border Rivers Regulated River Water Source 2009 Methodology The estimation of domestic and stock rights uses a series of estimates for water usage, stocking rates, population and property shape based on local knowledge to calculate riparian (stock and domestic) requirements in megalitres per year. The annual extraction for Domestic and Stock rights in the water accounts is assumed to be the estimated figure stated in the Water Sharing Plan for the Border Rivers Regulated River Water Source 2009 (8000 ML).




Note 7 - Held environmental water This represents environmental water that is held as part of a licensed volumetric entitlement. These licences are held within the same licence categories as all other water access licences hence are subject to the same operating rules. Therefore they are subject to the following key rules:

• Available Water Determinations (AWD) for their share of the entitlement to be added to accounts.

• Carryover rules hence the forfeiting of unused water that cannot be carried over. • Provide water orders prior to use.

These licences are used to provide environmental benefit and outcomes to the catchment by either providing water to, or supplementing water requirements of, a specific environmental events or incidents. Data type Measured Policy Water Management Act 2000

Water Sharing Plan for the NSW Border Rivers Regulated River Water Source 2009

Available on the DPI Water Website at www.water.nsw.gov.au Data accuracy A1 – Nil inaccuracy +/- 0% Providing agency DPI Water Data source WaterNSW / DPI Water – Water Accounting System (Joint ownership of System).

Available Water Determination Register - DPI Water website at www.water.nsw.gov.au Methodology The water held for the environment represents a volume of water in corresponding allocation accounts. This allocation account represents the sum of the remaining volume of held environmental water at the conclusion of the water year once all transactions and forfeit rules have been applied to the accounts. These environmental balances are at the licence category level and represent the water that can be carried forward for use in the next year. Below is list of typical transactions that can apply to an environmental allocation account:

• AWD (including pro rata of AWD for new licences) • Licensed extractions • Over order debits • Forfeiture due to:

o Carryover rules o Account spillage as a result of AWD o Licence conversions o Excess orders (where water order debiting is in place)

• Licence conversion • Trade of allocation water between accounts • Annual account limit





In addition the trade and purchase of environmental water is tracked to capture the movement of environmental entitlement both in number of entitlements, and volume. Additional information The table on the following page provides a summary of held environmental water for 2014-15 Table 12: Explanatory information for Environmental Account Summary

Heading Description

No. Licences This is the number of environmental licences held.

Share This is the total volume of entitlement in the specific licence category on the stated date.

Opening The volume of water that has been carried forward from previous years allocation account.

AWD The total annual volume of water added to the allocation account as a result of allocation assessments.

Assignments In Increase in account water as a result of Temporary Trade in.

Out Decrease in account water as a result of Temporary Trade out.

Over Order Debit Volume of water ordered that exceeded the recorded usage for corresponding periods which must also be accountable against the licence (excluding supplementary licence holders)

Account Usage Volume of water that is extracted or diverted from the river under controlled river conditions and is accountable against the licence.

During Year Forfeit Account water forfeited throughout the year as a result of the accounting rules specified in the water sharing plan. Forfeited water may occur due to account limits being reached, conversions between licence categories and various types of other licence dealings.

End of Year Balance

Available Account balance that is available to be taken at the conclusion of the water year.

Non Available Account balance that is currently not available for use (e.g. restricted due to drought conditions or annual use limit restrictions)

End of Year Forfeit Account water that is forfeited at the end of the water year as a result of carryover rules that restrict the carry forward volume.

Carry Forward This represents the account water that is permitted to be carried forward into the next water year as determined by the carryover rules.



Table 13: Environmental account summary 2014-15

Category Share Opening Balance AWD

Assignments Account Usage

Over Order Debit

During Year Forfeit

End of Year Balance End of Year

Forfeit Carry

Forward In Out Available Not

Available

Regulated River (General Security A) 0 0 0 0 0 0 0 0 0 0 0 0

Regulated River (General Security B) 420 97 7 0 0 0 0 0 104 0 0 104

Supplementary Water 0 0 0 0 0 0 0 0 0 0 0 0

Table 14: Annual change summary for environmental licences

Category

30-June-14 30-June-15

Difference No. Licences

Licenced Volume

No. Licences

Licenced Volume

Regulated River (General Security A) 1 0 1 0 0

Regulated River (General Security B) 2 420 2 420 0

Supplementary Water 1 0 1 0 0



Note 8 - Environmental Stimulus Account A provision for an environmental stimulus flow is detailed in the plan which is put aside and called upon to supplement natural flow events when the defined triggers are met. At the beginning of each water year a volume of 4,000 megalitres must be set aside in the resource assessment process for Pindari dam. If at any time during 1 April to 31 August, inflows to Pindari exceed 1,200 megalitres per day, an environmental stimulus flow shall be released between 1 August and 1 December.

The timing, rate and total volume is to be determined by the Department of Environment and Heritage in consultation with DPI Water. The unused water held within the account may be carried forward to the following water year, however the account may not exceed 8,000 megalitres at the beginning of any water year. Data type Administration Policy Water Sharing Plan for the NSW Border Rivers Regulated River Water Source 2009

• Part 3 Environmental Water Provisions o Clause 12 – Planned Environmental Water

Refer to applicable Water Sharing Plan on the DPI Water website at www.water.nsw.gov.au Data accuracy A1 – Nil inaccuracy +/- 0% Providing agency WaterNSW Data source Annual compliance report (internal document) Methodology N/A Additional Information Table 15: Stimulus Flow Summary 2009-10 to 2014-15

Water year Opening balance Increase Account usage End of year

forfeit

Carry forward balance

2009-10 0 4,000 0 0 4,000

2010-11 4,000 4,000 0 0 8,000

2011-12 8,000 4,000 0 4,000 8,000

2012-13 8,000 0 8,000 0 0

2013-14 0 4,000 4,000 0 0

2014-15 0 4,000 0 0 4,000

http://www.water.nsw.gov.au/Water-Management/Water-sharing/default.aspx



Note 9 - Account adjustments This is a line item that is used to correct balances in the allocation account balances. The double entry accounting being applied is a continuous process whereby the closing balance of one year is the opening balance for the proceeding year. Occasionally corrections will be required for a variety of reasons including when an error is identified in prior year reporting or when a process that had previously been reported is unable to be supplied and the associated asset or liability must be removed to maintain the integrity of the statements. This is different to the unaccounted difference component which is a physical volume required to achieve mass balance after all the known processes have been accounted.

For errors or updates identified in previously reported physical figures the figures are directly updated and the change is identified in the associated note. Data type Calculated Accuracy A1 – Nil inaccuracy +/- 0% Providing agency DPI Water Data source Not applicable Methodology N/A Additional information For the 2014-15 GPWAR an account correction of minus 3 megalitres was applied to the prior year General Security B account in order to have the correct opening balance brought forward.



Note 10 - Surface water storage This is the actual volume of water stored in the individual surface water storages at the date of reporting. The volumes provided represent the total volume of water in the storage, including dead storage which is the volume of water which can’t be accessed under normal operating conditions e.g. volume below low level outlet. It is assumed that the dead storage can be accessed if required via alternative access methods e.g. syphons.

The volume presented in the statements is the full volume held within Glenlyon and Pindari storages and Boggabilla Weir as of the reporting date. The actual volume available to settle NSW liabilities (removing the QLD share of the volume) can be obtained from the reconciliation and future prospect statements within this GPWAR. Data type Derived from measured data Policy Not applicable Data accuracy A – Estimated in the range +/- 10% Providing agency DPI Water Data source DPI Water – HYDSTRA Methodology Storage volumes are calculated by processing a gauged storage elevation through a rating table that converts it to a volume. The following table provides a breakdown of the storage capacities and dead storages. Table 16: Capacity and dead storage summary table

Storage Capacity (ML) Dead storage (ML)

% of full capacity 30 June 2014

% of full capacity 30 June 2015

% volume change 2014-15

Glenlyon Dam 254,310 160 38 30 (8)

Pindari Dam 312,000 80 17 26 9

Boggabilla Weir 5,850 410 41 41 0



Note 11 - River channel storage The estimated volume of water stored in the river channel on the day of reporting. Policy Not applicable Data type Derived from measured data Data accuracy B – Estimated in the range +/- 25% Providing agency DPI Water Data sources DPI Water: HYDSTRA, CAIRO Methodology For each river section S(n):

V = Q x T

The river channel storage will be equal to the sum of all river section volumes.

River channel storage = ∑ S(n) V Table 17: Summary of river channel storage calculation components

Symbol Variable Data Source Unit

Q Average flow in the river section. Calculated by averaging the daily flows at the upstream and downstream river gauges.

HYDSTRA ML/d

V Volume in each river section. Calculated ML

T Average travel time for a parcel of water to travel through the river section. CAIRO days

Assumptions and approximations:

• Travel times are estimated to the nearest day. • Daily flow change between gauging sites assumed to be linear.



Note 12 - Storage inflow – Glenlyon and Pindari Dams Storage inflow refers to the volume of water flowing into the major headwater storages – Glenlyon Dam and Pindari Dam. Policy Not applicable Data type Derived from measured data Data accuracy A – Estimated in the range +/- 10% Providing agency DPI Water Data sources DPI Water: HYDSTRA, Integrated Quantity and Quality Model (IQQM) Methodology In most of the major storages in NSW there is no direct measurement of inflows. However, it is possible to calculate inflows by using a mass balance approach (based on balancing the change in storage volume) where inflow is the only unknown. This is referred to a backcalculation of inflows.

The backcalculation figures were derived using a one day time step with the inflow calculated according to the equation below. The daily inflows are then summed to provide an annual inflow figure.

I = ΔS + O + Se + ((E – R)* Kp* A)

Table 18: Components for backcalculation of inflow

Symbol Variable Unit

I Inflow ML/day

ΔS Change in storage volume ML

O Outflow ML/day

Se Seepage ML/day

R Rainfall mm/day

E Evaporation mm/day

Kp Pan evaporation factor

A Surface area - derived from height to surface areas lookup curve ha

Assumptions and approximations:

• Constant storage specific pan evaporation factors are applied (one annual factor). • Seepage was assumed to be zero



Note 13 - Storage evaporation and storage rainfall This refers to the volume of water effective on Glenlyon and Pindari Dams that is either lost as a result of evaporation, or gained as a result of rainfall. Data type Derived from measured data Policy Not applicable Data accuracy B – Estimated in the range +/- 25% Providing agency DPI Water Data source DPI Water – IQQM backcalculation, HYDSTRA Methodology While the backcalculation program within IQQM requires the effect of evaporation and rainfall on the storage to be calculated, it is currently output as a net evaporation figure. The ED AWAS 1 specifies that off-setting should be avoided and as such, a further calculation was required to split the net evaporation figure to rainfall and evaporation. This is achieved by first, outputting daily time-series of storage surface area from the backcalculation (which uses a height to area lookup curve as defined in HYDSTRA). Daily rainfall and evaporation data is then applied to the area time-series to achieve a volume in megalitres which is then aggregated to an annual figure. The rainfall and evaporation data utilised is equivalent to the data used in the storage inflow backcalculation, with the same pan factor applied to the evaporation data.

Rainfall: Volume (ML) = Rainfall (mm) x Area (m2) x 10-6

Evaporation: Volume (ML) = Pan Evaporation (mm) x Pan Factor x Area (m2) x 10-6 Table 19: Pan factors utilised for calculation

Storage Pan factor applied

Glenlyon 0.9

Pindari 0.9



Note 14 - River evaporation and river rainfall This is an estimate of the total volume of water interacting with the defined accounted river extent that is either lost as a result of evaporation, or gained as a result of rainfall. Data type

Derived from measured data Policy Not applicable Data accuracy C – Estimated in the range +/- 50% Providing agency DPI Water Data source DPI Water: HYDSTRA, ARCGIS

QLD Department of Natural Resources: SILO Methodology The volume applied for evaporation and rainfall on the regulated river is achieved by first calculating a daily time-series of river area. This is achieved by breaking the river up into reaches and utilising the cross sections recorded at river gauging locations to determine the average width of the river with a given daily flow. River length is then determined between two gauging locations using ARCGIS and as such an area for each reach can be defined.

Area (m2) = Average W (m) x L (m)

Where W is the daily width determined from the gauging cross sections and L is the length as determined through ARCGIS analysis.

With daily area determined, various climate stations are then selected based on their proximity to each river reach. Rainfall and evaporation data is then extracted from SILO and applied to the area time-series to achieve a volume in megalitres which is then aggregated to an annual figure.

Rainfall: Volume (ML) = Rainfall (mm) x Area (m2) x 10-6

Evaporation: Volume (ML) = ET0 (mm) x Kc x Area (m2) x 10-6

Where ET0 = reference evapotranspiration from SILO and Kc = crop factor for open water (1.05)



Note 15 - Gauged inflow The inflow into the accounted regulated river system that occurs downstream of the headwater storages that is measured at known gauging stations. Policy Not applicable Data type Measured data Data accuracy A – Estimated in the range +/- 10% Providing agency DPI Water Data sources DPI Water: HYDSTRA Methodology The flows are obtained by measuring river heights at gauging stations along the river, and then passing these heights through a rating table that converts them to a daily flow volume. Additional information The total gauged inflow for 2014-15 is detailed in the table below. Table 20: Summary of gauged tributary inflow 2014-15

Station Area (km2) Volume (ML)

416008 Beardy River at Haystack 866 25,927

416010 Macintyre River at Wallangra 2,020 32,209

416021 Frazers Creek at Westholme (Ashford) 804 40,129

416032 Mole river at Donaldson 1,610 34,065

416415A Macintyre Brook at Booba Sands6 4,092 19,863

416207A Weir River at Mascot 13,500 13,816

416310A Dumaresq River at Farnbro 1,309 32,811

416312A Oaky creek at Texas 422 3,371

416305B Brush Creek at Beebo 335 1,096

Total Gauged Tributary Inflow 203,286

6 End of System gauge for regulated Macintyre Brook = Inflow from Macintyre Brook regulated system



Note 16 - Ungauged Inflow The estimated inflow into the river that occurs downstream of the headwater storages that is not measured. Policy Not applicable Data type Estimated Data accuracy

C – Estimated in the range +/- 50% Providing agency DPI Water Data sources DPI Water, WaterNSW: CAIRO Methodology The amount of ungauged catchment runoff contributing volume to the river asset was estimated using the gauged flow information, the relative catchment areas and a climatic factor to account for rainfall differentiation across the catchments.

The methodology assumes that runoff events in the gauged sub-catchments respond similar to rainfall events in ungauged sub-catchments subject to area and rainfall volume.

UE = ((GI x Au)/Ag) x RF

Where

UE = Ungauged estimate

GI = Total gauged inflow from representative sub-catchments

Au = Area of contributing ungauged catchment

Ag = Area of representative gauged sub-catchments

RF = Rainfall factor (estimated total rainfall in ungauged area / estimated total rainfall in gauged areas)

For the purposes of this calculation, catchment areas and runoff for Pindari dam, Glenlyon Dam and the Macintyre Brook regulated system were excluded. Ungauged contribution to the accounting entity downstream of Boggabilla was assumed to be zero. The rainfall factor used was 0.83, based on comparing the rainfall at Tenterfield (assumed representative of gauged areas) with the rainfall that fell at Pindari Dam (assumed more representative of ungauged areas).



Note 17 – Flow leaving system/replenishments This refers to flow that leaves the entity and does not return to the entity. Replenishment flows refers to water that has been set aside as part of the essential requirements for the provision of flows along the Boomi River to supply water households and stock. The annual requirements and limits associated with this provision are detailed in the water sharing plan. Data type Derived from measured data Policy Not applicable Data accuracy A – Estimated in the range +/- 10% Providing agency DPI Water Data source DPI Water – HYDSTRA

WaterNSW – annual compliance report (internal document) Methodology The end of system flow is considered to be the total gauged flow at Mungindi (Figure 21). Flow also leaves the entity down the Boomi River which has been measured with the flow gauge at the Boomi Weir offtake (Figure 22). Water leaving the system down the Boomi River is tagged as ‘replenishment’ or ‘other’ based on information in the WaterNSW annual compliance report. Additional information Table 21: Flow leaving system and replenishment summary 2014-15

Gauging Station Total

Measured Volume (ML)

Replenishment (ML) Other (ML)

416001 Barwon River at Mungindi 95,358 N/A N/A

416037 Boomi River at Boomi Weir Offtake 21,834 2,127 19,707



Figure 21: End of system flow for Border Rivers Regulated River 2014-15

0

500

1000

1500

2000

25001-

Jul-2

014

1-Au

g-20

14

1-Se

p-20

14

1-O

ct-2

014

1-N

ov-2

014

1-De

c-20

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1-Ja

n-20

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1-Fe

b-20

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1-M

ar-2

015

1-Ap

r-20

15

1-M

ay-2

015

1-Ju

n-20

15

1-Ju

l-201

5

Flow

(ML/

d)

Barwon River at Mungindi Boomi River at Boomi Weir offtake

Figure 22: Boomi River replenishment flows 2014-15

0

100

200

300

400

500

600

700

1-Ju

l-201

4

1-Au

g-20

14

1-Se

p-20

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ct-2

014

1-N

ov-2

014

1-De

c-20

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1-Ja

n-20

15

1-Fe

b-20

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ar-2

015

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Flow

(ML/

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Boomi River at Boomi Weir offtake Replenishment flow supplied from Pindari Dam

Additional excess flows diverted to Boom River



Note 18 – NSW Extractions from River With the exception of basic rights (which has been reported as a separate line item in this GPWAR and detailed in Note 12), this refers to the actual volume of water directly pumped or diverted from the NSW (side of the) regulated river.

Occasionally (generally in the case of environmental water) volumes are ordered against a licence account for in-stream benefits or for end of system flow events. In addition tagged trading can occur where NSW account water is taken through a Queensland work (pump) and vice versa. As such the volume reported to be physically extracted from the river will not always be equal to the amount of water debited to accounts for account usage, which has been reported in detail in Note 3. There may also be an over order debit which has reduced a holders account but not physically been taken out of the river.

QLD extractions also form part of the physical volume of water taken from the regulated river and these are detailed in note 20. Data type Measured data Policy Not applicable Data accuracy A – Estimated in the range +/- 10% Providing agency DPI Water Data source WaterNSW / DPI Water – Water Accounting System (Joint ownership of system).

DPI Water – Water Ordering and Usage database

QLD Department of Environment and Resource Management Methodology For the purposes of this GPWAR, the NSW physical extraction from the river is considered to be the total usage volume metered and debited to the NSW allocation accounts; minus any water that can be identified as being used within the system, or ordered to be passed through the system, plus any QLD water taken through NSW pumps, minus any NSW water taken through QLD pumps. Additional information Table 22: Reconciliation of NSW river extraction to NSW account usage Volume (ML) Extractions from river (excl basic rights) 42,944 Licenced flow leaving system 0 In stream licenced usage 0 QLD account water taken in NSW (tagged trade) (4,022) NSW account water taken in QLD (tagged trade) 737 Total Allocation Account Debits for account usage 39,659



Note 19 – Storage Releases (including transparent releases) The volume of water released or spilled from either Pindari Dam or Glenlyon Dam. In the accounting this release is represented as both a decrease in the storage asset and an equal increase in asset to the river asset (shown as the combined total release in the line item ‘Inflow from releases’). The policy for planned environmental water outlined in the water sharing plan requires that a transparent flow of up to 200 megalitres in June, July and August, and up to 50 megalitres for all other months be released from Pindari dam when a range of specified triggers have been met. Releases that satisfy the transparent release requirement have been presented as a separate sub component of the total release. Data type Measured data Policy Water Sharing Plan for the NSW Border Rivers Regulated River Water Source 2009

Part 3 Environmental Water Provisions

o Clause 12 – Planned Environmental Water Refer to applicable Water Sharing Plan on the DPI Water website at www.water.nsw.gov.au Data accuracy A – Estimated in the range +/- 10% Providing agency DPI Water Data source DPI Water – HYDSTRA database

WaterNSW Annual Compliance Report (internal document) Methodology The flows are obtained by measuring river heights at a gauging station downstream of the dam release site and then passing these heights through a rating table that converts them to a daily flow volume. The releases have been represented in the Statement of Changes in Water Assets and Water Liabilities as both a decrease in water asset (water leaving the dam) and an equal volume of increases in water asset (water released increasing the volume of the river).

To provide more detail the dam release for Pindari Dam has been split into the volume released to meet transparent, water sharing plan requirements, and the volume released for other purposes. Additional Information The Pindari Dam required minimum release of 10 megalitres per day was met or exceeded at all times throughout 2014-15.

Transparent releases had some minor shortfalls however total releases in those months exceeded the target requirements.




Figure 23: Storage releases Glenlyon Dam 2014-15

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Figure 24: Storage releases for Pindari Dam 2014-15

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Note 20 – QLD extractions The volume of water extracted from the accounted river extent by QLD licence holders. While detailed information is not presented in this account, it is necessary to include the bulk figures extracted to maintain the integrity of the river physical mass balance. Total volumes extracted are provided in megalitres Data type Measured data Policy Water Resource (Border Rivers) Amendment Plan 2007

New South Wales – Queensland Border Rivers Intergovernmental Agreement 2008

Available at the QLD Department of Environment and Resource Management webpage (http://www.derm.qld.gov.au) Data Accuracy A – Estimated in the range +/- 10% Providing Agency Queensland Department of Natural Resources and Mines Data Source N/A Methodology Figures are consolidated from data provided by the Queensland Government. Diversions are decreased for tagged trade into NSW and increased for tagged trade to QLD, in order to achieve the correct physical extraction volumes for each state.

http://www.derm.qld.gov.au/



Note 21 – Supplementary extractions This is the volume of water extracted or diverted under supplementary access licences during announced periods of supplementary water. Supplementary flow events are announced periodically during the season when high flow events occur with the period of extraction and volume of water to be extracted determined based on the rules as set out in the water sharing plans. It is important to note that supplementary access licences differ from other categories of access licence in that the volume of water in the account refers to an annual upper limit for extractions and its provision is totally reliant on the occurrence of high flow events. Data type Measured data Policy Water Sharing Plan for the NSW Border Rivers Regulated River Water Source 2009

• Part 8 Limits to the availability of water o Division 2 - Available water determinations

- Clause 38 - Available water determinations for supplementary water access licences

• Part 9 Rules for managing access licences o Division 3 - Extraction conditions

- Clause 45 - Taking of water under supplementary water access licences upstream of the Macintyre River and Dumaresq River junction

- Clause 46 - Taking of water under supplementary water access licences downstream of the Macintyre River and Dumaresq River junction

Refer to applicable Water Sharing Plan on the DPI Water website at www.water.nsw.gov.au Data accuracy A – Estimated in the range +/- 10% Providing agency DPI Water Data source WaterNSW / DPI Water – Water Accounting System (Joint ownership of system). Methodology Supplementary water extraction and diversion data is collected by either on farm meters that measure extraction or gauges on diversion works. Meter readings are collected for individual licence holders at intervals during the year and converted via a calibration factor to a volume of water extracted. Water diverted from the river is measured by recording the height at either the gauge or weir with the volume diverted being derived by passing these heights through a rating table. However, with supplementary water being extracted through the same pumps as those extracting water under other categories of access licences additional information is required to separate out supplementary extraction. Licence holders are therefore required to provide notification of their intention to pump prior to pumping or diverting water during the declared supplementary event and provide meter readings both at the commencement and conclusion of pumping. This enables the supplementary flow extraction to be assessed independent of other categories of access licences.




Additional Information Table 23: Supplementary Announcements 2014-15

Event Period: 12-Dec-2014 to 22-Dec-2014 Licence Categories: SUPPLEMENTARY WATER

Event Limit: 100.00% or 1.0000 ML per Share Announcement Date: 12-Dec-14

Catchment Section Start Date End Date Total Usage

Dumaresq River Glenlyon to Roseneath 12-Dec-14 22-Dec-14 10

Dumaresq River Roseneath to Bonshaw Weir 12-Dec-14 22-Dec-14 373

Dumaresq River Bonshaw Weir to Texas Br 12-Dec-14 22-Dec-14 111

Dumaresq River Texas Br to Cunningham Weir 12-Dec-14 22-Dec-14 167

Dumaresq River Cunning Weir to Glenarbon 13-Dec-14 22-Dec-14 0

Dumaresq River Glenarbon to Mcintyre Brook junction 13-Dec-14 22-Dec-14 4

Dumaresq River Macintyre Brook junction to Macintyre River 14-Dec-14 22-Dec-14 0

Macintyre River Dumaresq Junction to Bogabilla Weir 14-Dec-14 22-Dec-14 0

Macintyre River Bogabilla Weir to Goondiwindi Weir 14-Dec-14 22-Dec-14 0

Event Period: 29-Dec-2014 to 12-Jan-2015

Licence Categories: SUPPLEMENTARY WATER Event Limit: 100.00% or 1.0000 ML per Share

Announcement Date: 29-Dec-14


Dumaresq River Glenlyon to Roseneath 29-Dec-14 12-Jan-15 28

Dumaresq River Roseneath to Bonshaw Weir 29-Dec-14 12-Jan-15 233

Dumaresq River Bonshaw Weir to Texas Br 29-Dec-14 12-Jan-15 186

Dumaresq River Texas Br to Cunningham Weir 29-Dec-14 12-Jan-15 69

Dumaresq River Cunning Weir to Glenarbon 29-Dec-14 12-Jan-15 45

Dumaresq River Glenarbon to Mcintyre Brook junction 29-Dec-14 12-Jan-15 0

Dumaresq River Macintyre Brook junction to Macintyre River 29-Dec-14 12-Jan-15 6

Macintyre River Dumaresq Junction to Bogabilla Weir 29-Dec-14 12-Jan-15 0

Macintyre River Bogabilla Weir to Goondiwindi Weir 29-Dec-14 12-Jan-15 67



Event Period: 29-Jan-2015 to 10-Feb-2015 Licence Categories: SUPPLEMENTARY WATER

Event Limit: 100.00% or 1.0000 ML per Share Announcement Date: 29-Jan-15


Severn River Pindari Dam to Ashford (Gs416006) 29-Jan-15 6-Feb-15 0

Severn River Ashford (Gs416006) to Macintyre Junction 29-Jan-15 8-Feb-15 0

Macintyre River Bedwell Downs to Yetman (Gs416005) 29-Jan-15 8-Feb-15 0

Macintyre River Yetman (Gs416005) to Holdfast 29-Jan-15 8-Feb-15 141

Macintyre River Holdfast to Dumaresq junction 29-Jan-15 9-Feb-15 0

Dumaresq River Glenlyon to Roseneath 29-Jan-15 9-Feb-15 18

Dumaresq River Roseneath to Bonshaw Weir 29-Jan-15 9-Feb-15 189

Dumaresq River Bonshaw Weir to Texas Br 29-Jan-15 9-Feb-15 60

Dumaresq River Texas Br to Cunningham Weir 29-Jan-15 9-Feb-15 49

Dumaresq River Cunning Weir to Glenarbon 29-Jan-15 9-Feb-15 6

Dumaresq River Glenarbon to Mcintyre Brk Jubc 29-Jan-15 9-Feb-15 0

Dumaresq River Macintyre Book Junc to Macintyre River 29-Jan-15 10-Feb-15 0

Macintyre River Dumaresq Junction to Bogabilla Weir 29-Jan-15 10-Feb-15 0

Macintyre River Bogabilla Weir to Goondiwindi Weir 29-Jan-15 10-Feb-15 42

Event Period: 10-Apr-2015 to 30-Jun-2015

Licence Categories: SUPPLEMENTARY WATER Event Limit: 100.00% or 1.0000 ML per Share

Announcement Date: 10-Apr-15


Severn River Pindari Dam to Ashford (Gs416006) 10-Apr-15 30-Jun-15 0

Severn River Ashford (Gs416006) to Macintrye Junction 10-Apr-15 30-Jun-15 0

Macintyre River Yetman (Gs416005) to Holdfast 10-Apr-15 30-Jun-15 12

Dumaresq River Glenlyon to Roseneath 10-Apr-15 30-Jun-15 0

Dumaresq River Roseneath to Bonshaw Weir 10-Apr-15 30-Jun-15 21

Dumaresq River Bonshaw Weir to Texas Br 10-Apr-15 30-Jun-15 0

Dumaresq River Texas Br to Cunningham Weir 10-Apr-15 30-Jun-15 0

Dumaresq River Cunning Weir to Glenarbon 10-Apr-15 30-Jun-15 0

Dumaresq River Glenarbon to Mcintyre Brook junction 10-Apr-15 30-Jun-15 5

Dumaresq River Mcintyre Brook junction to Macintyre River 10-Apr-15 30-Jun-15 1

Macintyre River Dumaresq Junction to Bogabilla Weir 10-Apr-15 30-Jun-15 0

Macintyre River Bogabilla Weir to Goondiwindi Weir 10-Apr-15 30-Jun-15 0



Figure 25: Border Rivers 2014-15 supplementary usage by river section

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357

51

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56

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153

0 100 200 300 400 500 600 700 800 900 1,000

Boggabilla Weir to Goondiwindi Weir

Bonshaw Weir to Texas Br

Cunning Weir to Glenarbon

Glenarbon to Mcintyre Brook junction

Glenlyon to Roseneath

Macintyre Brook junction to Macintyre River

Roseneath to Bonshaw Weir

Texas Br to Cunningham Weir

Yetman (Gs416005) to Holdfast

Usage (ML)

Figure 26: Border Rivers total daily supplementary water extractions 2014-15

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Note 22 - Unaccounted volume In theory if all the processes of a water balance could be accurately accounted for the unaccounted difference would be zero. In reality due to the large uncertainties in many of the volumes presented in the accounts, the various sources from which the data has been obtained and the fact that not all processes of the water cycle have been accounted, the statements are not balanced at the end of the accounting process. In order to balance the accounts a final balancing entry is required, and this is termed the unaccounted difference. As technology progresses and accuracy improves in the account estimates, it is anticipated that relatively, this figure should reduce in future accounts. Data type Calculated Policy Not applicable Data accuracy D7 – Estimated in the range +/- 100% Providing agency DPI Water Data source Not applicable Methodology For surface water the unaccounted difference is equal to the amount required to obtain the correct volume in river at the end of the reporting period, after all the known physical inflows and outflows have been accounted. The double-entry accounting process attempted to represent the physical movement of water by creating a river asset. The opening and closing balance of the river volume was estimated according to Note 11.

UDSW = Rs – Rc + Ri - Ro Where:

UDSW = Unaccounted difference for Surface Water

Rs = Opening river volume estimate

Rc = Closing river volume estimate

Ro = Physical outflows from the river (e.g. extractions)

Ri = Physical inflows to the river (e.g. runoff, return flows, dam releases)

7 The unaccounted differences is rated D accuracy due to fact it is the result of many processes of differing magnitude, and accuracy, and also representing a range of other processes that have not been explicitly represented in the accounts. The figure that is calculated to be the required unaccounted volume in order to balance the accounts is A1 accuracy, +/- 0%



References WASB 2012, Australian Water Accounting Standard 1 Preparation and Presentation of

General Purpose Water Accounting Reports (AWAS 1), Bureau of Meteorology



Appendix 1 - Groundwater



Groundwater bounded by Border Rivers surface water catchment Groundwater management for the area bounded by the NSW Border Rivers surface water catchment is covered by 5 Water Sharing Plans and all or part of 11 of the groundwater sources within these plans that are detailed in Table 24. More detail can be found in both Figure 27 and Table 25 at the end of this section. Table 24: Groundwater sources in the Border Rivers

Water sharing plan Water sources applicable for the Border Rivers catchment

Date commenced Expires

Water Sharing Plan for the NSW Great Artesian Basin (GAB) Groundwater Sources

Surat Groundwater Source

1 July 2008 30 June 2018

Eastern Recharge Groundwater Source

Water Sharing Plan for the NSW Great Artesian Basin (GAB) Shallow Groundwater Sources

Surat Shallow Groundwater Source

1 July 2012 30 June 2022

Water Sharing Plan for the NSW Murray Darling Basin Fractured Rock Groundwater Sources

Lachlan Fold Belt Groundwater Source

6 January 2012 30 June 2022

New England Fold Belt Groundwater Source

Water Sharing Plan for the NSW Murray Darling Basin Porous Rock Groundwater Sources

Gunnedah-Oxley Basin MDB Groundwater Source

1 July 2012 30 June 2022

Water Sharing Plan for the Lower Gwydir Groundwater Source

Lower Gwydir Groundwater Source

1 October 2006 30 June 2017

Water Sharing Plan for the NSW Border Rivers Unregulated and Alluvial Groundwater Sources

Macintyre Alluvial Groundwater Source

1 July 2012 30 June 2022

NSW Border Rivers Upstream Keetah Bridge Alluvial Groundwater Source

NSW Border Rivers Downstream Keetah Bridge Alluvial Groundwater Source

Ottleys Creek Alluvial Groundwater Source



With no planning model available, and the absence of sufficient monitoring bore data, the soil water budget accounting method (method C) was used to analyse the movement of water among various components of the hydrologic system utilising by applying a daily accounting procedure to the NSW Border Rivers surface water catchment.

It provides a method to estimate the spatially distributed runoff and potential recharge when no groundwater bore information is available via a basic book keeping technique that tracks the balance between the inflow of water from precipitation and the outflow of water by evapotranspiration, stream flow and drainage (potential groundwater recharge). A detailed description of this method is available in ‘General Purpose Water Accounting Reports - Groundwater methodologies’ (referred to as method C) and can be accessed via the DPI Water website.



Figure 27: Border Rivers Surface Water Catchment – Groundwater Water Sharing Plans


Groundwater Management 2014-15 All groundwater licences in the NSW Border Rivers were granted an equivalent allocation of 1 megalitre per share with the exception of supplementary licences within the Lower Gwydir Alluvium which received an allocation of 0.143 megalitres per share (note only the far top edge of the Lower Gwydir Alluvium crosses into the Border Rivers Surface water management boundary).

Under the terms set out in the Water Sharing Plan for the Lower Gwydir Groundwater Source 2003 the announcement for supplementary licences is reduced each year by 0.143 megalitres with the announcement set to be zero from the 2015/16 season onwards. The purpose of this licences category was to reduce entitlements to a sustainable level, while allowing significant time and flexibility for effective users to adapt to these changes.

Management of groundwater in the Border Rivers catchment is by the rules set out in the water sharing plans. These plans provide long term average annual extraction limits for each water source within the plans which determine the maximum volume of water that may be extracted under access licences and pursuant to domestic and stock rights and native title rights from each groundwater source on a long-term average annual basis.


Table 25: Border Rivers surface water catchment groundwater sources summary table

Long Term Annual Extraction Limit

(ML/Year) Licence Category Share Allocation

Announcement

Water Source % within

Border Rivers

Metered Usage 2014-15

(total water source)

NSW Great Artesian Basin Groundwater Sources

Surat 75,0008

Domestic and Stock Rights9 28,100 NA

11.0%

2,867 Local Water Utility 3,318 100% of Share Aquifer 5,502 1 ML/Share Aquifer [Town Water Supply] 25 100% of Share

Eastern Recharge 19,00010

Domestic and Stock Rights 2,000 NA

83%

12,679 Domestic and Stock [Town Water Supply] 32 100% of Share

Aquifer 34,974 1 ML/Share NSW Great Artesian Basin Shallow Groundwater Sources

Surat Shallow 143,335 Domestic and Stock Rights9 978 NA

11.0% 1,217 Local Water Utility 50 100% of Share Aquifer 5,662 1 ML/Share

NSW Murray Darling Basin Fractured Rock Groundwater Sources

Lachlan Fold Belt 821,250


2%

4,488 Local Water Utility 2,371 100% of Share Aquifer 68,119 1 ML/Share Salinity and Water Table Management 236 100% of Share

New England Fold Belt 204,784


39% 99 Local Water Utility 554 100% of Share Aquifer 7,967 1 ML/Share Aquifer [General Security] 1,000 1 ML/Share Aquifer [Town Water Supply] 60 100% of Share

8 This figure represents the volume of water required to maintain pressure levels experienced under the level of water extraction associated with the water entitlements, infrastructure and management rules in place at 1990 (sustainable pressure estimate equivalent). The Long term average extraction limit is calculated based on this figure and adjusted as specified in the plan. 9 Domestic and Stock Rights are not a licenced entitlement and therefore do not have an allocation announcement associated with them. The value in the table is that specified in the water sharing plans for each of the water sources. 10 This figure represents the long-term average annual net recharge. The Long term average extraction limit is calculated based on this figure and adjusted as specified in the plan.



Long Term Annual Extraction Limit

(ML/Year) Licence Category Share Allocation

Announcement

Water Source % within

Border Rivers

Metered Usage 2014-15

(total water source)

NSW Murray Darling Basin Fractured Rock Groundwater Sources

Inverell Basalt 25,807 Domestic and Stock Rights11 1,073 NA

65%

103 Aquifer 3,079 1 ML/Share

NSW Murray Darling Basin Porous Rock Groundwater Sources

Gunnedah-Oxley Basin MDB 199,893 Domestic and Stock Rights11 5,778 NA

13% 6,694 Local Water Utility 480 100% of Share Aquifer 22,809 1 ML/Share

Lower Gwydir Groundwater Source

Lower Gwydir 41,108

Domestic and Stock Rights11 700 NA

6% 42,630 Local Water Utility 3,572 100% of Share Aquifer 28,858 1 ML/Share Supplementary 012 0.143 ML/share

NSW Border Rivers Unregulated and Alluvial Groundwater Sources

Macintyre Alluvial 373 Domestic and Stock Rights11 106 NA

100% 27 Local Water Utility 35 100% of Share Aquifer (High Security) 1,558 1 ML/Share

NSW Border Rivers Upstream Keetah Bridge Alluvial 8,085 Domestic and Stock Rights11 179 NA

100% 5,169 Local Water Utility 10 100% of Share Aquifer 15,392 1 ML/Share

NSW Border Rivers Downstream Keetah Bridge Alluvial 316 Domestic and Stock Rights11 66 NA

100% 2 Aquifer 485 1 ML/Share

Ottleys Creek Alluvial 30 Domestic and Stock Rights11 29 NA 100% N/A

11 Domestic and Stock Rights are not a licenced entitlement and therefore do not have an allocation announcement associated with them. The value in the table is that specified in the water sharing plans for each of the water sources. 12 Supplementary licences cancelled June 30 2015


Groundwater flows 2014-15 The simulated annual potential recharge for the method C modelled area between 1 July 2014 and 30 June 2015 was 189,149 ML13. Comparing potential recharge in 2014-15 to the average annual potential recharge (1971-72 – 2014-15) shows that the recharge was well below the average of 419,000 ML. Additionally this was the fourth consecutive year of below average potential recharge (Figure 28). The spatial representation of the 2014-15 deviation from mean potential recharge, indicated recharge was below average across the entire extent of the catchment in particular in the eastern extent of the catchment (Figure 29). Figure 28: Border rivers catchment annual potential recharge (1970-71 to 2014-15)

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Figure 29: 2014-15 Potential recharge deviation from long term mean

13 Model recalibrated based on surface water stream gauges since 2013-14 GPWAR

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