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The Role of Groundwater in Effective Water Management. Sonoma Valley Basin Advisory Panel May 31, 2007. John Woodling CA Department of Water Resources. Overview. What is Conjunctive Use? The State’s Role in Groundwater Management Data Programs Partnerships Grants Examples - PowerPoint PPT Presentation
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The Role of Groundwaterin Effective Water Management Sonoma Valley Basin Advisory PanelMay 31, 2007John WoodlingCA Department of Water Resources
OverviewWhat is Conjunctive Use?The States Role in Groundwater ManagementData ProgramsPartnershipsGrantsExamplesAmerican RiverKern CountyOrange CountyClimate Change
Groundwater is Part of the Hydrologic Cycle
California Water Plan
Additional Water from Management Strategies
Conjunctive Water ManagementCoordinated use of surface and groundwater to increase water supply and improve reliability.GWSWCM
Elements of Conjunctive Use
Surface Water Source Imported waterLocal runoffTreated wastewaterConveyance
Recovery and UseExtraction and direct usePump back to conveyanceSurface water exchange TreatmentConveyance
Recharge Method Direct spreadingInjectionIn-lieu rechargeInduced natural recharge
InstitutionsLaws, Regulations, OrdinancesContracts and AgreementsPolitical SupportFinancing/Economics
Capacity BuildingGW ManagementProject ConstructionThe States RoleDATA PROGRAMS
DWR Bulletin 118 Defined 520 basins in California Hydrologic, physical, and political boundaries GW also occurs in non-alluvial settingshttp://www.groundwater.water.ca.gov/bulletin118/index.cfm
Water Data Library Map based interface for groundwater level data
Local Partnerships Technical assistance Facilitation Stakeholder driven planning Local development of projects
$27 million in grants over five fiscal years 128 studies and projectsMonitoring wells, sampling and analysisGroundwater modelingAquifer testing and pilot studiesWell destructionGroundwater storage feasibility studiesManagement plan development
Local Groundwater Assistance Grants
Construction GrantsProposition 13 provided over $250 million for construction of conjunctive use facilitiesFunded 63 projectsYield of over 300,000 acre-feet of water annuallyTotal project costs over $1 billion through local cost shareProposition 50 provides $500 million for multiple project categories
Proposition 84$1 Billion for IRWM grants$3-4 billion local cost share expectedRegional allocationsProjected 1.2 million acre-feet of water supply$37$73$57$138$36$27$52$60$114$91$215$ in millionsassist local public agencies to meet long term water needs of the state including the delivery of safe drinking water and the protection of water quality and the environment.
Case StudiesAmerican River Basin
Orange County
Kern County
American River Basin Regional Conjunctive Use ProgramFolsom ReservoirGroundwater BasinAmerican RiverSacramento River
Water Purveyors in the American River Basin
Conjunctive Use Program ConceptsIn-lieu recharge alternatives centered around American and Sacramento River treatment plants, limited ASR Conveyance to move surface water to traditional groundwater users in wet yearsExtraction capability for traditional surface water users shift to groundwater in dry yearsIntegrated operation of Folsom Lake and the groundwater basin.
Institutional ControlsSacramento Water Forum AgreementSacramento Groundwater Authority (SGA)JPA of Cities of Sacramento, Citrus Heights and Folsom, and County of Sacramento. Representation delegated to water purveyor boardsEnsure equitable disbursement of costs and benefitsResponsible for monitoring and reporting in basin
Orange County Water District
Orange County Groundwater Replenishment System
Major Partners OCWD OC Sanitation District Project Benefits Provides 72 TAF supply Reduces dependence on imported water Utilizes investments in existing recharge, pumping and distribution facilities Postpones need for new ocean outfall for wastewater Enhances GW basin protection from seawater intrusion Reduces effluent loading to ocean
Kern County Groundwater Banking
San Joaquin Valley Banking Projects Location Map
Kern County
Delano-Earlimart ID
Rag Gulch WD
Kern-Tulare WD
Southern San Joaquin MUD
North Kern WSD
Cawelo WD
Shafter-Wasco ID
Rosedale-Rio Bravo WSD
KCWA Improvement District No. 4
Olcese WD
Arvin-Edison WSD
Tehachapi-Cummings CWD
Tejon-Castac WD
Kern Delta WD
Wheeler Ridge-Maricopa WSD
Henry Miller WD
West Kern WD
Buena Vista WSD
Semitropic WSD
Lost Hills WD
Berrenda Mesa WD
Devils Den WD
Belridge WSD
Lake Isabella
Kern River
Lebec CWD
California Aqueduct
Friant-Kern Canal
Bakersfield
Cross Valley Canal
NON-GROUNDWATER AREAS
GROUNDWATER AREAS
Semitropic Groundwater Banking Program
Kern Fan Banking Unit Berrenda Mesa Project City of Bakersfield 2,800 acres Kern Water Bank Pioneer Project West Kern-Buena Vista Project
Arvin-Edison Water Management Program
*
Kern County Conjunctive UseMajor PartnersKern County WA, Arvin-Edison WSD, Buena Vista WSD, Cawelo WD, Semitropic WSD, North Kern WSD & Kern Water Bank Authority
Current projectsIncreased recharge and extraction capacityCVC enlargementCVC Friant Kern IntertiePumping plants for two-way Friant Kern Canal$46 million in Prop 13 fundingIntegrates all surface suppliesImproves dry-year yield
How will climate change affect you?Changes in precipitationChanges in runoff Sea level rise
Increasing TemperaturesProjections
From: Dettinger, 2005
jwoodlin - Probably too detailed
Water Resource Impacts from Increased Temperatures
Less precipitation falling in the form of snow
Earlier snowmelt
Changes in water demand
Increased evapotranspiration losses
Changes in watershed vegetation and related changes in runoff
Increased water temperatures and increased demand for temperature control releases from reservoirs
Increased water temperatures and increased water column productivity (increased algae production, etc.)
Responses to Climate ChangeMitigationAB 32 reduced GHG emissions
AdaptationConservationSurface StorageConjunctive UseLand Use
Needs and IssuesTechnicalStream/Aquifer InteractionClimate changeEnvironmental Benefits/ConsequencesWater Quality Implications of Recharge Subsidence Measurement and MonitoringImproved ModelsEnergy relationshipsSite Specific FactorsScience-based Policy
Needs and IssuesPolitical/InstitutionalLand useWater agency vs. County control Public trust vs. private use Water QualityLegalWater rightsStorage rightsEconomicThird party impactsBenefit/CostPublic funding
The End