Groundwater Basin Assessment Study

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Groundwater Basin Assessment Study Southern California Water Dialogue Southern California Water Dialogue January 24, 2007 January 24, 2007

description

Groundwater Basin Assessment Study. Southern California Water Dialogue January 24, 2007. In-Basin Groundwater Storage Projects. 1. 3. 12. 9. 4. Approved Projects N. Las Posas (Phases 1&2) Long Beach Foothill MWD TVMWD / La Verne Chino Basin Orange County Basin Compton - PowerPoint PPT Presentation

Transcript of Groundwater Basin Assessment Study

Page 1: Groundwater Basin Assessment Study

Groundwater Basin Assessment StudyGroundwater Basin Assessment Study

Southern California Water DialogueSouthern California Water Dialogue

January 24, 2007January 24, 2007

Page 2: Groundwater Basin Assessment Study

Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

Approved ProjectsApproved Projects1.1. N. Las Posas (Phases 1&2)N. Las Posas (Phases 1&2)2.2. Long BeachLong Beach3.3. Foothill MWDFoothill MWD4.4. TVMWD / La VerneTVMWD / La Verne5.5. Chino BasinChino Basin6.6. Orange County BasinOrange County Basin7.7. ComptonCompton8.8. Long Beach - LakewoodLong Beach - Lakewood9.9. Upper Claremont Heights – TVMWDUpper Claremont Heights – TVMWD10.10. Western MWD /Elsinore ValleyWestern MWD /Elsinore Valley

In-Basin Groundwater Storage ProjectsIn-Basin Groundwater Storage ProjectsIn-Basin Groundwater Storage ProjectsIn-Basin Groundwater Storage Projects

Identified ProjectsIdentified Projects12.12. Raymond Basin - Foothill MWD & PasadenaRaymond Basin - Foothill MWD & Pasadena

11 33

7722

44

55

66

1212

88

99

Pending ProjectsPending Projects11.11. Central Basin MWDCentral Basin MWD

1111

1010

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

In-Region Groundwater Storage In-Region Groundwater Storage ResourcesResources

In-Region Groundwater Storage In-Region Groundwater Storage ResourcesResources

IdentifiedIdentifiedExistingExisting IRP TargetIRP Target

0

50

100

150

200

250

300

350

2005 2006 2010 2020 2025

Th

ou

san

ds

AF

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

Scope of Assessment StudyScope of Assessment StudyScope of Assessment StudyScope of Assessment Study

Use of existing data and reportsUse of existing data and reports

Service area overviewService area overview

Detailed review of 23 sub-areasDetailed review of 23 sub-areas

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

Scope of Assessment StudyScope of Assessment StudyScope of Assessment StudyScope of Assessment Study

Basin hydrogeology Basin hydrogeology

GovernanceGovernance

Facilities and operationsFacilities and operations

Water levelsWater levels

Water qualityWater quality

Storage programsStorage programs

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

Groundwater Groundwater BasinsBasins

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

Raymond BasinRaymond Basin

PasadenaPasadena

MonkhillMonkhill

SantaSantaAnitaAnita

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

0

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150,000

200,000

250,000

300,000

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Fiscal Year

Pro

du

ctio

n (

AF

Y)

Production

Operating Yield

Safe Yield = 152,700 AFY

MSGB ProductionMSGB ProductionMSGB ProductionMSGB Production

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

150

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1985

1986

1987

1988

1989

1990

1991

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1996

1997

1998

1999

2000

2001

2002

2003

2004

Fiscal Year

Wat

er L

evel

(fe

et M

SL

)

Operating Range

Source: Stetson, 2006

A

MSGB Key Well Water LevelMSGB Key Well Water LevelMSGB Key Well Water LevelMSGB Key Well Water Level

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

ULARA PrecipitationULARA PrecipitationULARA PrecipitationULARA Precipitation

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1985/86

1987/88

1989/90

1991/92

1993/94

1995/96

1997/98

1999/00

2001/02

2003/04

Water Year

Pre

cip

itat

ion

(in

ches

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Source: ULARA, 2006

Average = 18.6 inches

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

0

50,000

100,000

150,000

200,000

250,000

300,000

1985/86

1986/87

1987/88

1988/89

1989/90

1990/91

1991/92

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Water Year

Dir

ect

Gro

un

dw

ater

Rec

har

ge

(AF

Y)

Spreading - RunoffSpreading - ImportedSpreading - RecycledInjection - Imported

Average ~141,000 AFY

Central Basin Direct RechargeCentral Basin Direct RechargeCentral Basin Direct RechargeCentral Basin Direct Recharge

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

Chino BasinChino Basin Cucamonga BasinCucamonga Basin

Chino Basin Aquifer CapabilityChino Basin Aquifer CapabilityChino Basin Aquifer CapabilityChino Basin Aquifer CapabilityParameterParameter

  StructureStructure

Upper aquifer: UnconfinedUpper aquifer: UnconfinedDeep aquifer: ConfinedDeep aquifer: Confined UnconfinedUnconfinedAquifer(s)Aquifer(s)

Yield and StorageYield and Storage

140,000 AFY140,000 AFY 13,800 AFY to13,800 AFY to22,200 AFY22,200 AFY

145,000 AFY145,000 AFY 22,721 AFY22,721 AFY

~ 6 million AF~ 6 million AF UnknownUnknown

~1 million AF~1 million AF UnknownUnknown

~500,000 AF~500,000 AF UnknownUnknown

Natural Safe YieldNatural Safe Yield

Adjudication AmountAdjudication Amount

Total StorageTotal Storage

Unused Storage SpaceUnused Storage Space

Avail. Storage SpaceAvail. Storage Space

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

CentralCentral Basin GovernanceBasin GovernanceCentralCentral Basin GovernanceBasin Governance

Agency Role

California Department ofCalifornia Department ofWater ResourcesWater Resources

Court appointed Watermaster to manage water quantity

Water Replenishment DistrictWater Replenishment Districtof Southern Californiaof Southern California

Groundwater replenishment in Central and West Coast Basins

Los Angeles CountyLos Angeles CountyDepartment of Public WorksDepartment of Public Works

Operation of spreading facilities and Alamitos Barrier facilities

Sanitation Districts ofSanitation Districts ofLos Angeles County Los Angeles County

Produces recycled water for MontebelloForebay Spreading Grounds

Los Angeles Regional Los Angeles Regional Water Quality Control BoardWater Quality Control Board

Issuance of permit for spreading of recycled water in Montebello Forebay

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

Chino Spreading CapabilityChino Spreading Capability(Partial List)(Partial List)

Chino Spreading CapabilityChino Spreading Capability(Partial List)(Partial List)

BasinWetted

Area(acres)

RechargeCapacity

(cfs)

RechargeCapacity

(AFY)

BrooksStreet 7.7 5 3,000

Montclair 28.2 10 7,770

7th & 8th

Street 14.5 5 1,350

Upland 10.1 4 2,730

Ely 35.7 3 2,880

Source Water Owner

RunoffImported

CBWCD

RunoffImported

CBWCD

RunoffSBCFCD

RunoffImported

City ofUpland

RunoffRecycled

SBCFCD/CBWCD

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

 Table 5

Summary of Constituents of Concern in Main San Gabriel Basin 

Constituent Range Description

TDS(mg/L)

90 to 4,288Average ~ 367

Municipal wells indicate a range of 172 to 914 mg/L

(average of 318 mg/L)

Nitrate [as N](mg/L)

ND to 27.8 Exceed nitrate MCL in eastern portion of basin.

VOCs [TCE and PCE]

(μg/L)

TCE: ND to 499 PCE: ND to 330

64 wells are currently treated for VOCs

Perchlorate(μg/L)

ND to 18322 wells removed from service due

to perchlorate levels (treatment facilities are currently online)

NDMA(ppt)

ND to > 2 8 local wells have NDMA above

action level of 2 ppt(3 facilities currently in operation)

MSGB Water Quality IssuesMSGB Water Quality IssuesMSGB Water Quality IssuesMSGB Water Quality Issues

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

 MSGB Treatment OperationsMSGB Treatment Operations

 MSGB Treatment OperationsMSGB Treatment Operations

TreatmentType

# ofWells Contaminant Treatment

Target

TreatmentCost

($/AF)

AmountTreated(AFY)

Air Stripping 39 VOCs ND $25 47,000

LPGAC 16 VOCs ND Varies 14,000

Ultra-Violet/ Oxidation

9 1,4-Dioxane ND $100 6,000

Ion Exchange 17 Perchlorate ND $200 6,000

Ultra-Violet 12 NDMA ND $100 6,000

Total 93 -- ND -- 79,000

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007

SummarySummarySummarySummary

Baseline report that expands upon DWR Bulletin 118 and the AGWA report

Overview of basin management and use

Report complete later this year

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Water Resource ManagementWater Resource Management January 24, 2007January 24, 2007