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Overview of Indian Wells Valley Hydrogeology and Management . Presenters. Location. DWR B-118 Basin 6-54. Kern, Inyo and San Bernardino Counties 382,000 acres (597 sq mi) 4-inch ave ppt 2,150-2,400 feet elevation valley floor Closed, internally drained basin. Institutional Setting.
DWR B-118Basin 6-54 • Kern, Inyo and San Bernardino Counties • 382,000 acres (597 sq mi) • 4-inch aveppt • 2,150-2,400 feet elevation valley floor • Closed, internally drained basin
City of Ridgecrest • Incorporated 1963 - Population ~30,000 • Major Employers --NAWS - 3500 --Searles Minerals - 600 --School District - 600 --Hospital – 300 • General Plan encourages --LID approaches --Expand recycled water --Increased conservation --Protect groundwater • Provides 1.4MGD reclaimed water to NAWS golf course
Indian Wells Valley Water District • Formed in 1955 as Ridgecrest County Water District by consolidating several smaller domestic services water companies under CWC Division 12, and modified through several Improvements Districts (Assessment District 82-1, 87-1 & 91-1) • Service area 38 sq mi (8 sq mi public lands) • Services domestic, residential, institutional water; construction of rights of ways; fire protection; recreation; and emergency water restrictions. • Provides water to approximately 12,000 connections • Operates 10 active water supply wells • Actively pursuing water conservation and water use efficiency, addressing arsenic, and improving water supply
Indian Wells ValleyCooperative Groundwater Management Group • Water levels have declined in areas within the Valley. • As depth to groundwater increases, production and distribution costs will increase. • As depth to groundwater increases, the potential exists for poorer quality water to mix with and degrade higher quality water. • Some portion of the recharge to the Valley from the Sierra Nevada may be lost to evaporation in the China Lake playa. • Our understanding of the geohydrology of the Valley is based on groundwater quantity and quality data collected from available production and monitoring wells located throughout much of the Valley. • The recharge and discharge characteristics of the aquifer are not fully understood. • Adequacy of the known groundwater reserves to meet future demands shall be determined.
Indian Wells ValleyCooperative Groundwater Management Group • 1995 – formed to manage the basin cooperatively • “Memorandum of Understanding” • Naval Air Weapons Station • Kern County Water Agency • City of Ridgecrest • Inyokern Community Services District • Bureau of Land Management • Indian Wells Valley Water District • Searles Valley Minerals • Quist Farms • Eastern Kern County Resources Conservation District
Indian Wells ValleyCooperative Groundwater Management Group Purpose • Set forth guidelines and management principles for the production, distribution, and use of groundwater within the purview of the participants. • Further develop (cooperatively or individually) the technical data and analytical capabilities to better understand the nature and characteristics of the watershed and aquifer system. • Apply these guidelines toward sound management practices to extend the useful life of the groundwater resource to meet current and foreseeable future demands. • Coordinate interested local agencies and water producers into a cooperative planning effort to share information and management practices to maintain the life of the resource.
Indian Wells ValleyCooperative Groundwater Management Group • Limit additional large scale pumping in areas that appear to be adversely impacted. • Distribute new groundwater extraction within the Valley in a manner that will minimize adverse effects to existing groundwater conditions (levels and quality), and maximize the long-term supply within the Valley. • Aggressively pursue the development and implementation of water conservation policy and education programs. • Encourage the use of treated water, reclaimed water, recycled, gray and lower quality water where appropriate and economically feasible. • Explore the potential for other types of water management programs that are beneficial to the Valley. • Continue cooperative efforts to develop information and data which contributes to further defining and better understanding the groundwater resource in the Indian Wells Valley. • Develop an inter-agency management framework to implement and enforce the objectives of this Plan.
AB303 Study 2003 - Groundwater Management in the Indian Wells Valley Basin
AB303 Study 2008 - Groundwater Monitoring Program in the Indian Wells Valley Basin
Indian Wells ValleyGroundwater Challenges • Groundwater Quantity • Basin groundwater levels declining 1 to 1 ½ ft/yr • Some rural well issues with these shallower wells • Groundwater Quality • Salinity • Arsenic
Current/Future Efforts • Participating in the Inyo Mono IRWMP • Brackish Water Supply • Increasing Conservation • Shifting Pumping to Reduce Localized Drawdown • CASGEM Monitoring Program • Aquifer Testing in Southwest Basin • Updating the Groundwater Management Plan
Current/Future EffortsParticipating in the Inyo Mono IRWMP • Over 40 federal, state, regional and county agencies, organizations and private stakeholders from Easter Sierra Nevada • Facilitation and participation from DWR at Inyo Mono IRWMP meetings • Completed the IRWMP in January 2011 • Projects submitted and undergoing review • IWVWD Brackish Water Project