Kern Water Bank Authority · 2011. 3. 7. · Kern County Subbasin of the San Joaquin Valley...

Kern Water Bank Authority


in Kern County


How is your ground water basin governed and managed? Who is responsible? Who pays? Does this model work? What are the pros and cons? Do you consider this local control or regional control?

How are you addressing the new reporting requirements for ground water? Will the data be valuable? What should we know, in order to manage basins?

How is your basin recovering during this wetter than average winter?

What are you doing now to improve yield, including recharge from various sources?

What are your major challenges regarding ground water basin management?


Kern County Subbasin of the San Joaquin Valley Groundwater Basin

2,000 square miles – about 40 miles wide by 65 miles long

Sediments up to 32,000 feet thick, useable groundwater limited to upper 1,500 feet

Most of the basin subdivided into an upper unconfined aquifer and a lower confined aquifer – important exception under the Kern River Alluvial Fan


Tulare LakeHydrologic Region


Tulare LakeHydrologic Region

Kern CountySubbasin


Water Storage Districts (8), Water Districts (6), Others (4)

Purpose – balance consumptive uses within district

Means – provide surface supplies at equal or lower cost than pumping GW◦ Assessments to cover administrative costs and subsidize

a portion of water acquisition and delivery costs◦ Set water rates such that groundwater users pay the

same as surface water users

Effectiveness overall good – some districts in overdraft

Districts cannot restrict landowner pumping


Kern R

iver

Fri

an

t -

Kern

Can

al

California Aqueduct

0 2.5 5

Miles

Kern CountyGroundwater Basin

KER

N

SA

N L

UIS

OB

ISP

O

KERN

KERN

VENTURA

SANTA BARBARA

TULAREKINGS

Rosedale-Rio Bravo WSD

SemitropicWSD

Cawelo WD

North Kern WSD

KCWAID4

West Kern WD

Kern-TulareWD

Rag GulchWD

Arvin-EdisonWSD

Kern Delta WD

Buena Vista WSD

BMWSD

Pioneer

KWBCOB

BuenaVistaWSD

Wheeler Ridge-Maricopa WSD

Tejon-CastacWD

BelridgeWSD

Lost Hills WD

Deleno-Earlimart

ID

Berrenda MesaWSD

Kern R

iver

Fri

an

t -

Kern

Can

al

California Aqueduct

Shafter-WascoID

SouthernSan Joaquin

MUD

Henry MillerWD

0 2.5 5

Miles

Kern County Water Districts

Legend

Major Water Conveyance

Arvin-Edison / MWD

Belridge

Berrenda Mesa

Buena Vista

Cawelo

City of Bakersfield - 2800 Acres

Delano-Earlimart

Henry Miller WD

ID4 / Kern-Tulare / Rag Gulch

Kern Delta / MWD

Kern Water Bank

KTWD RGWD

Lost Hills

North Kern

Pioneer Project

Rosedale-Rio Bravo

Semitropic / WMD / et al

Shafter - Wasco ID

Southern San Joaquin MUD

Tejon-Castac WD

West Kern

Wheeler Ridge-Maricopa

KER

N

SA

N L

UIS

OB

ISP

O

KERN

KERN

VENTURA

SANTA BARBARA

TULAREKINGS

Groundwater Management Plans Developed as a vehicle to demonstrate

effective local management and hopefully preclude state-wide control

Voluntary - not used in adjudicated basins or basins otherwise managed

Used as a planning tool Provides for rules and regulations, but

generally cannot curtail pumping Most districts in Kern County have adopted

plans


Prevent a return to historical overdraft

Maintain groundwater quality

Monitor water levels, water quality, and groundwater storage

Estimate groundwater use and future demand

Update progress on achieving objectives


Banking MOU’s establish Monitoring Committees ◦ Are composed of bankers and adjoining entities

◦ Engage an independent consultant◦ Establish a groundwater evaluation methodology

and plan◦ Prepare annual reports on water quality and

operations◦ Recommend modifications to project operations to

minimize project impacts◦ Are the first venue for dispute resolution



KCWAID4

Kern Delta WD

Buena Vista WSD

BMWSD

Pioneer

KWB

COB

BuenaVistaWSD

Kern R

iver

Fri

an

t -

Kern

Can

al

California Aqueduct

RRID

Henry MillerWD

MRID

IRWD

BVWKWD

SemitropicWSD

North Kern WSD

Shafter-WascoID

SouthernSan Joaquin

MUD

0 2.5 5

Miles

Banking Projectsand Adjoining Entities

Legend

Banking Projects

Berrenda Mesa WSD

Buena Vista WSD

City of Bakersfield

Irvine Ranch WD

Kern Water Bank

Pioneer Project

Rosedale - Rio Bravo WD

West Kern WD


Buena Vista

Henry Miller WD

ID4

Kern Delta

Mc Allister Ranch ID

North Kern

Rosedale Ranch ID

Rosedale-Rio Bravo

Semitropic

Shafter - Wasco ID

Southern San Joaquin MUD

KER

N

SA

N L

UIS

OB

ISP

O

KERN

KERN

VENTURA

SANTA BARBARA

TULAREKINGS

Most districts signed up for CASGEM

Have been collecting data for years, so nothing new

Need to know levels and quality – very well documented in most banking areas

Better information on the fringes of the basin and in some districts would be helpful

Would be very helpful to know pumping rates - most consumptive use estimated from crop surveys


RRBWSD

IRWD

BMWSD

Pioneer

KWB

COB - 2800 A

c.

WKWD

Kern River

Frian

t - Kern

Can

al

California Aqueduct BVWSD

0 0.5 1

Miles

Kern Fan Banking Projects

Legend

RRBWSD Recharge Baisns

Berrenda Mesa WSD

Buena Vista WSD

City of Bakersfield

Irvine Ranch WD

Kern Water Bank

Pioneer Project


West Kern WD

RRBWSD

IRWD

BMWSD

Pioneer

KWB

COB - 2800 A

c.

WKWD

Kern River

Frian

t - Kern

Can

al

California Aqueduct BVWSD

0 0.5 1

Miles

Kern Fan Banking Projectsand Monitoring Well Locations

Legend

Monitoring Well Locations

RRBWSD Recharge Baisns

Berrenda Mesa WSD

Buena Vista WSD

City of Bakersfield

Irvine Ranch WD

Kern Water Bank

Pioneer Project


West Kern WD

KWB alone has recharged ~90,000 AF of water since December

Water levels starting to recover:

-30000

-20000

-10000

0

10000

20000

30000

40000

50000

60000

1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Acre

-feet

per

Mo

nth

KWB Recharge and Recovery

3rd Party K-R F-K SWP Recovery

Total Recharge 1.65 million AFTotal Recovery 0.86 million AFCurrent Storage 0.71 million AF**excludes 3rd Party

Water Banking◦ Has greatly improved Kern County’s ability to

capture surplus supplies

◦ Infrastructure built by partners improves water conservation

◦ Banking program loss factors and other provisions insure water is left behind to benefit basin

◦ “2 for 1” Banking


In lieu◦ Surface supplies provided in lieu of

groundwater pumping

Direct recharge◦ Water is physically stored in aquifer for

later recovery


In-Lieu Recharge

Water Is Stored By

Percolating Directly

To Storage

Water Is Stored By Substituting

Surface Water For An

Equal Amount Of Groundwater



SemitropicWSD

Cawelo WD

North Kern WSD

KCWAID4

West Kern WD

Kern-TulareWD

Rag GulchWD

Arvin-EdisonWSD

Kern Delta WD

Buena Vista WSD

BMWSD

Pioneer

KWBCOB

BuenaVistaWSD

Wheeler Ridge-Maricopa WSD

Tejon-CastacWD

Westside MutualWater Company

BelridgeWSD

Lost Hills WD

Deleno-Earlimart

ID

Berrenda MesaWSD

Kern R

iver

Fri

an

t -

Kern

Can

al

California Aqueduct

0 2.5 5

Miles

Kern County GroundwaterBanking Program Participants

Legend


Westside Mutual

City of Bakersfield - 2800 Acres

Berrenda Mesa

Lost Hills

Belridge

Pioneer Project

Kern Water Bank

Semitropic / WMD / et al

Tejon-Castac WD

Wheeler Ridge-Maricopa

Arvin-Edison / MWD

North Kern

Delano-Earlimart

ID4 / Kern-Tulare / Rag Gulch

KTWD RGWD

Buena Vista

Rosedale-Rio Bravo

Kern Delta / MWD

Cawelo

West Kern

KER

N

SA

N L

UIS

OB

ISP

O

KERN

KERN

VENTURA

SANTA BARBARA

TULAREKINGS

Water supply limitations caused by regulatory constraints in the Delta◦ Increases reliance on groundwater pumping

Overdraft◦ Some districts in surplus, most close to balance, some in

chronic overdraft

Water levels◦ Some older wells not deep enough for current water

levels

Water quality◦ Salinity challenges from using the basin 0.3 tons salt per AF of imported SWP water

◦ Salinity benefits of banking About 1.8 tons of salt exported per ton of salt imported


-30000

-20000

-10000

0

10000

20000

30000

40000

50000

60000

1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010

Acre

-feet

per

Mo

nth

KWB Recharge and Recovery

3rd Party K-R F-K SWP Recovery

Total Recharge 1.65 million AFTotal Recovery 0.86 million AFCurrent Storage 0.71 million AF**excludes 3rd Party

Kern Water Bank Authority · 2011. 3. 7. · Kern County Subbasin of the San Joaquin Valley...

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