NFRWSP: Conservation/Irrigation

Efficiency Methods Briefing

Jennifer Gihring SJRWMD

February 17, 2015

Water Supply Plan

Projected Demand

Estimated Conservation

Potential

Net Demand

Net Demand

Water Available

From Traditional

Sources

Alternative Water Supply

Projects Needed

= -

- =

Why account for conservation/irrigation efficiency

in water supply planning? Means to decrease future demands and reduce

the need for alternative water supplies and water resource development.

Reduce Demands

Extend Available Water Supply Sources

Conservation/Irrigation Efficiency by Use Category

Category Tool

PS, DSS, & CII Conservation Potential

FAWCET with Residential Indoor & Outdoor BMPs and Commercial Indoor BMPs

AG Irrigation Efficiency Direct MIL Method

LRA, M/D, PG Not calculated

Conservation and Irrigation Efficiency

SAC briefed on conservation tools in July 2013

BMPs in the tools help quantify

potential conservation & irrigation efficiency. They do not require or limit

what water users choose to implement.

Conservation Potential Tool: FAWCET

• Florida Automated Water Conservation Estimation Tool (FAWCET)

• Analyzes conservation potential (volume & cost) for indoor residential use, outdoor use, and publicly supplied commercial uses

• Optimization can run to meet different goals: volume, gpcd, or budget.

How FAWCET Works • Join account-level data from utilities to

property appraiser parcels. • Use account-level data to generate

residential load profiles relative to property characteristics.

• Set starting assumptions/constraints. • Linear programming optimization to select

the most cost effective BMPs.

Account-Level Data in FAWCET

FAWCET Single Family Indoor Load Profiles

0%

5%

10%

15%

20%

25%

30%

35%

40%

45%

50%

0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000

Gallons/Month

Perc

ent o

f Acc

ount

s/U

tility

(W

eigh

ted

Aver

age)

Extrapolating from Load Profiles to Parcels

+ 2010 Census Block Data

1. Avg. HH Population

Load Profiles (from Utility Billing Data)

1. Location ID 2. Meter Size 3. Service Address 4. Parcel ID 5. GIS Join ID 6. Service Type 7. Billing Class 8. Monthly Consumption

1. Physical Address 2. Parcel ID 3. DOR Code 4. Just Value 5. Land Square Footage 6. Actual Year Built 7. Total Heated Area 8. Number of Buildings 9. Number of Res Units

County Property Appraiser Data

+

Scale is key

How FAWCET Works

Parcel Data Model input assumptions

Summary Report

Table and map containing BMP

selection, savings, & cost by parcel

Optimization tool

Conservation Potential: FAWCET BMPs

Indoor Residential • Replacement of toilets, showerheads, and

faucets Commercial Indoor • Spray valves, toilets, showerheads, faucets,

& urinals Outdoor • Irrigation system audits and improvements • Soil moisture sensors

FAWCET Assumptions for NFRWSP

• Florida Water Star specifications for plumbing fixture BMPs

• BMP cost limit of $3.00/1,000 gallons • BMP participation rate - CFWI values as

default; soliciting data from NF utilities/local governments for refinement

• GPCD constraint - TBD

Example FAWCET Output l

FAWCET: Next Steps • Complete initial FAWCET runs – in

progress. • Districts will evaluate and refine draft

runs. • Conduct revised FAWCET runs. • Apply FAWCET runs to projections. • Distribute to SAC.

Expect to distribute results with revised

values in March.

Irrigation Efficiency: Concept For an established 2035 crop scenario

(acres/crop type): • How much water is used grow those

crops with current practices? • How much less water would it take

to grow those same crops with increased investment in irrigation efficiency BMPs?

Irrigation Efficiency: Tools

• Direct Mobile Irrigation Lab (MIL) Method

• Preferred method for NFRWSP • Based on measured ag water

efficiency data collected by FDACS • Florida Automated Ag Resource Model

(FAARM) • Optimization tool similar to FAWCET • Currently in “beta” status

Irrigation Efficiency: “Direct MIL” Method

• Water savings/acre derived for various crops from MIL data

• Use actual values from post-implementation visits for farms that have implemented BMPs

• Crops summarized into crop categories • Savings/acre multiplied by the 2035 acreage

projection and participation rate(s) • Provides potential savings (mgd); does not

provide cost

Irrigation Efficiency: Direct MIL Example

(Central Florida)

Net Irrigation Efficiency Potential 10% Participation = 6.8 mgd 50% Participation = 34 mgd 100% Participation = 68 mgd

Direct MIL Details for NFRWSP

• Created common crop categories for both SRWMD and SJRWMD

• Revised MIL values with North Florida-specific data, where available

• Will report range of values reflecting variable participation rate

Irrigation Efficiency: NFRWSP MIL Data

Tree Crops Vegetables Nursery Blueberries

& Grapes Field Crops

Sod, Pasture, &

Grass •Citrus •Misc. Fruit & Nut

•Peaches •Pecans

• Cabbage • Carrots • Cucumbers • Melons • Peppers • Strawberries • Watermelons • Misc.

Vegetables

• Nursery (Open Field)

• Ornamentals (Container/ Field Grown)

• Ferns

• Blueberries • Grapes

• Beans • Corn (all) • Cotton • Misc/Other

Field Crops • Peanuts • Peas • Potatoes • Soybeans • Tobacco

• Improved Pasture

• Sod

Note: May shift some crops to be consistent with final ag projections

Irrigation Efficiency: NFRWSP MIL Data by Crop Category

Tree Crops Vegetables Nursery Blueberries & Grapes

Field Crops

Sod, Pasture, &

Grass

Statewide Values

SRWMD Statewide Values

Statewide Values

SRWMD

Statewide Values

Status • SR drafted values • SJR reviewed and concurred

• Finalize MIL input values (SJR & FDACS

review) • Finalize ag acreage projections & crop

categories • Apply MIL water savings/acre to

projections • District/FDACS review • SAC review & recommendation

Irrigation Efficiency: Next Steps

NFRWSP: Conservation and Irrigation Efficiency

Questions?