Groundwater Basin Assessment Study
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Transcript of Groundwater Basin Assessment Study
Groundwater Basin Assessment StudyGroundwater Basin Assessment Study
Southern California Water DialogueSouthern California Water Dialogue
January 24, 2007January 24, 2007
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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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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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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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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Groundwater Groundwater BasinsBasins
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Raymond BasinRaymond Basin
PasadenaPasadena
MonkhillMonkhill
SantaSantaAnitaAnita
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0
50,000
100,000
150,000
200,000
250,000
300,000
19
85
/86
19
86
/87
19
87
/88
19
88
/89
19
89
/90
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90
/91
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91
/92
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92
/93
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93
/94
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94
/95
19
95
/96
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/97
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/98
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98
/99
19
99
/00
20
00
/01
20
01
/02
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02
/03
20
03
/04
20
04
/05
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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150
175
200
225
250
275
300
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
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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ULARA PrecipitationULARA PrecipitationULARA PrecipitationULARA Precipitation
0
5
10
15
20
25
30
35
40
45
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
)
Source: ULARA, 2006
Average = 18.6 inches
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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
1992/93
1993/94
1994/95
1995/96
1996/97
1997/98
1998/99
1999/00
2000/01
2001/02
2002/03
2003/04
2004/05
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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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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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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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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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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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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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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