chino basin optimum basin management program · some chino basin stats ... – desalter i expansion...

Chino Basin Optimum Chino Basin Optimum Basin Management Basin Management ProgramProgram

February 6, 2006February 6, 2006

We will talk aboutWe will talk about

Chino Basin BasicsChino Basin BasicsYield Maintenance/EnhancementYield Maintenance/EnhancementNew stormwater rechargeNew stormwater rechargeSupplemental Water RechargeSupplemental Water RechargeWhere We Go From HereWhere We Go From Here

Some Chino Basin StatsSome Chino Basin Stats

Area is about 220 square milesArea is about 220 square milesContains about 6.1 million acreContains about 6.1 million acre--ftftPumpersPumpers–– 24 appropriators (cities, districts, etc)24 appropriators (cities, districts, etc)–– ~300 overliers (mostly ag)~300 overliers (mostly ag)

Current pumping is about 180,000 Current pumping is about 180,000 acreacre--ft/yrft/yr

Some Chino Basin StatsSome Chino Basin Stats

Basin was adjudicated in 1978Basin was adjudicated in 1978Watermaster governance is interestWatermaster governance is interest--basedbased–– Three pumper committees and an Three pumper committees and an

advisory committeesadvisory committees–– NineNine--member boardmember boardSafe yield is managed at 140,000 Safe yield is managed at 140,000 acreacre--ft/yrft/yr

Virgin Conditions (1905)

Water Level Decline (1933-2000)

SubsidenceArea

Optimum Basin Management Optimum Basin Management Program (OBMP)Program (OBMP)

Court Ordered Court Ordered –– February 1998February 1998OBMP was completed in August 1999OBMP was completed in August 1999““PeacePeace”” Agreement that implements Agreement that implements the OBMP the OBMP –– July 2000July 2000OBMP Program EIR OBMP Program EIR –– July 2000July 2000Court Approval of OBMP and Peace Court Approval of OBMP and Peace Agreement Agreement –– September 2000September 2000

Optimum Basin Management Optimum Basin Management Program (OBMP)Program (OBMP)

The OBMP in unprecedented in scopeThe OBMP in unprecedented in scopeCurrently in the sixth year of Currently in the sixth year of implementationimplementationVarious parties to the Peace Agreement are Various parties to the Peace Agreement are implementing the OBMPimplementing the OBMPPresent Value Cost of OBMPPresent Value Cost of OBMP–– Year 2000 Year 2000 –– over $400 millionover $400 million–– Year 2006 Year 2006 –– TBD but substantially >$400 TBD but substantially >$400

millionmillion

OBMP Contains Nine Major OBMP Contains Nine Major Initiatives or Program Initiatives or Program ElementsElements

Comprehensive Groundwater Monitoring Comprehensive Groundwater Monitoring –– PE 1PE 1Comprehensive Recharge Program Comprehensive Recharge Program –– PE 2PE 2Water Supply Plan for Impaired Areas Water Supply Plan for Impaired Areas –– PE 3PE 3Subsidence Area Management Program Subsidence Area Management Program –– PE 4PE 4Regional Supplemental Water Program Regional Supplemental Water Program –– PE 5PE 5Cooperative Programs with Water Quality Cooperative Programs with Water Quality Regulators Regulators –– PEPE--6 6 Salt Management Program Salt Management Program –– PE 7PE 7Storage Management Program Storage Management Program –– PE 8PE 8Storage and Recovery Program Storage and Recovery Program –– PE 9PE 9

Three Major OBMP Three Major OBMP InitiativesInitiatives

Hydraulic ControlHydraulic ControlIncreasing storm water recharge ~ Increasing storm water recharge ~ 12,000 acre12,000 acre--ft/yrft/yrIncreasing supplemental water Increasing supplemental water recharge capacityrecharge capacity

Hydraulic ControlHydraulic Control

Hydraulic Control Hydraulic Control

Yield is maintained and enhanced by:Yield is maintained and enhanced by:–– Reducing groundwater discharge to the Reducing groundwater discharge to the

Santa Ana River in its gaining reachesSanta Ana River in its gaining reaches–– Increasing groundwater recharge in the Increasing groundwater recharge in the

Santa Ana River losing reachesSanta Ana River losing reaches–– And thus:And thus:

Maintains existing yield of 140,000 acreMaintains existing yield of 140,000 acre--ft/yrft/yrCreates new yield of ~20,000 acreCreates new yield of ~20,000 acre--ft/yrft/yr


Hydraulic Control is achieved by:Hydraulic Control is achieved by:–– Constructing and operating new well Constructing and operating new well

fields in southern, water qualityfields in southern, water quality--degraded part of the Basindegraded part of the Basin

–– Managing supplemental water recharge Managing supplemental water recharge to reduce gradient towards the Riverto reduce gradient towards the River

Insert Nitrate MapInsert Nitrate Map

Insert TDS MapInsert TDS Map


Groundwater Treatment System:Groundwater Treatment System:–– Desalter I expansion from 8 to 14.2 mgdDesalter I expansion from 8 to 14.2 mgd–– New Desalter II New Desalter II –– 15 mgd15 mgd–– Total cost for wells, pipelines and Total cost for wells, pipelines and

treatment (RO and IX) >$100 milliontreatment (RO and IX) >$100 million–– Future expansions are being plannedFuture expansions are being planned

Desalter Well Location Desalter Well Location MapMap


Computer simulation results:Computer simulation results:–– Piezometric levels support increased Piezometric levels support increased

recharge from Santa Ana River ~ 20,000 recharge from Santa Ana River ~ 20,000 acreacre--ft/yrft/yr

–– Piezometric levels maintained in Piezometric levels maintained in subsidence areasubsidence area

–– Piezometric level drops about:Piezometric level drops about:20 to 50 feet in central part of the basin20 to 50 feet in central part of the basin25 feet near desalter wells25 feet near desalter wellsup to 75 feet in far north eastern part of the up to 75 feet in far north eastern part of the basinbasin


What would happen without hydraulic What would happen without hydraulic control?control?–– Discharge of 20 to 30 thousand acreDischarge of 20 to 30 thousand acre--ft/yr of ft/yr of

high TDS and nitrogen groundwater to Riverhigh TDS and nitrogen groundwater to River–– POTWPOTW’’s would have to desalt some of their s would have to desalt some of their

effluent and discharge to the River for effluent and discharge to the River for mitigationmitigation

–– Purchase 20 to 30 thousand acrePurchase 20 to 30 thousand acre--ft/yr of ft/yr of imported water to replace lost productionimported water to replace lost production

New Storm Water New Storm Water RechargeRecharge


Prior to the OBMP, Watermaster had Prior to the OBMP, Watermaster had completed a reconcompleted a recon--level recharge level recharge master planmaster plan–– Utilized sophisticated models to estimate Utilized sophisticated models to estimate

daily recharge for a 50daily recharge for a 50--year periodyear period–– Identified future potential for about Identified future potential for about

20,000 acre20,000 acre--ft/yr of new storm water ft/yr of new storm water rechargerecharge


OBMP facilitated the completion of OBMP facilitated the completion of the recharge master planthe recharge master planInland Empire Utilities Agency (IEUA) Inland Empire Utilities Agency (IEUA) immediately implemented the immediately implemented the recharge master planrecharge master planConstruction finished in 2005Construction finished in 2005


Construction of 3 new turnouts from the Construction of 3 new turnouts from the MWD Rialto pipeline for supplemental water MWD Rialto pipeline for supplemental water rechargerechargeInitial cost was $40 million Initial cost was $40 million -- $10 million $10 million required to fine tunerequired to fine tuneEstimated new yield based on the facilities Estimated new yield based on the facilities constructed is about 12,000 acreconstructed is about 12,000 acre--ft/yrft/yr

New Supplemental Water New Supplemental Water RechargeRecharge

Supplemental Water Supplemental Water RechargeRecharge

Existing SW recharge capacity is ~ Existing SW recharge capacity is ~ 50,000 to 60,000 acre50,000 to 60,000 acre--ft/yrft/yrFuture replenishment demand is Future replenishment demand is about 100,000 acreabout 100,000 acre--ft/yrft/yrMWDSC replenishment water is not MWDSC replenishment water is not reliablereliableFuture recharge capacity needs could Future recharge capacity needs could exceed 140,000 acreexceed 140,000 acre--ft/yrft/yr

New Recycled Water New Recycled Water RechargeRecharge

IEUA is constructing a regional recycled IEUA is constructing a regional recycled water distribution systemwater distribution systemWith new recharge basins, With new recharge basins, IEUA/Watermaster IEUA/Watermaster couldcould recharge over recharge over 30,000 acre30,000 acre--ft/yr of recycled waterft/yr of recycled waterNew storm and imported water recharge New storm and imported water recharge will be used for dilution to meet DHS and will be used for dilution to meet DHS and Basin Plan requirementsBasin Plan requirements

Where Do We Go From Where Do We Go From Here?Here?

Watermaster Parties and IEUA are Watermaster Parties and IEUA are currently:currently:–– Negotiating substantive changes to the Negotiating substantive changes to the

Peace AgreementPeace Agreement–– Assessing the need for additional Assessing the need for additional

desalting capacitydesalting capacity

Where Do We Go From Where Do We Go From Here?Here?

Watermaster, IEUA and others will Watermaster, IEUA and others will start:start:–– Planning the next phase of supplemental Planning the next phase of supplemental

water recharge projectswater recharge projects–– Planning the next phase of groundwater Planning the next phase of groundwater

storage projectsstorage projects

What Makes the OBMP What Makes the OBMP Work?Work?


Committed Watermaster Parties Committed Watermaster Parties ––agency managers, elected officials agency managers, elected officials and private pumpersand private pumpers

Regional leadership of the IEUA, Regional leadership of the IEUA, TWMWD, WMWD and SAWPATWMWD, WMWD and SAWPA


Support/direction from the Regional Support/direction from the Regional Board, DWR and other state agenciesBoard, DWR and other state agencies

Support from state legislators and Support from state legislators and congressional representativescongressional representatives

Questions?Questions?

EndEnd

chino basin optimum basin management program · some chino basin stats ... – desalter i expansion...

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