Groundwater serves as the primary water supply for more than two billion people worldwide (Famiglietti 2014) and supplies approximately 40% of irrigation water supply globally (Siebert et al. 2010). This heavy reliance on groundwater aquifers has led to the unsustainable depletion of groundwater resources at the regional and global scale resulting in an increasing number of conflicts over … Continue reading “Dispute Resolution Processes – Thinking Through SGMA Implementation: A Water in the West Series”
This report was funded by the Southern California Salinity Coalition (SCSC). SCSC and its member agencies are dedicated to managing salinity in the water supplies, wastewater, and recycled water. Member agencies include Eastern Municipal Water District (EMWD), Inland Empire Utilities Agency (IEUA), Metropolitan Water District of Southern California (MWDSC), Orange County Sanitation District (OCSD), Orange County Water District (OCWD), … Continue reading “Study to Evaluate Long-Term Trends and Variations in the Average Total Dissolved Solids Concentration in Wastewater and Recycled Water”
This technical memorandum discusses model simulation groundwater levels, groundwater budget, and particle tracking results to support the Environmental Impact Report of the Pure Water Soquel project involving replenishment of advanced purified recycled water within Soquel Creek Water District’s (SqCWD’s) service area. Six model simulations have been run using the calibrated GSFLOW model for the Santa … Continue reading “Pure Water Soquel Groundwater Model Simulation Results”
Under the leadership of Governor Edmund G Brown Jr., the 2014 California Water Action Plan set forth a vision for California water management that balances statewide water supply security with the protection of public, economic and ecological health. The Salton Sea offers a unique opportunity to preserve these values by leveraging a convergence of support … Continue reading “Salton Sea Management Program Phase I: 10-Year Plan”
As part of the Conservation Strategy for the 2017 Central Valley Flood Protection Plan (CVFPP), a continuation of the Floodplain Restoration Opportunity Analysis (FROA) (DWR 2012a) was conducted to develop, identify, and prioritize potential locations for implementing management actions. Two types of management actions were considered in this analysis: modification of floodplain topography (specifically, lowering … Continue reading “CVFPP Conservation Strategy Appendix I. Floodplain Restoration Opportunity Analysis”
The Water Resources Association of Yolo County (WRA) has entered into a Memorandum of Understanding (MOU) with the California Department of Water Resources (DWR) to cooperatively investigate conjunctive use opportunities in Yolo County. As part of the MOU, DWR is assisting the WRA to develop goals and objectives for a combined groundwater and surface water model of Yolo County, … Continue reading “Hydrologic Modeling Goals and Objectives for Yolo County”
The aquifers underlying the community of Los Osos in California are impaired by nitrate pollution from septic systems (shallow aquifers) and saltwater intrusion from overdraft (lower aquifers). The development of a centralized waste water system, now in the final pre- construction stages, is proceeding concurrently with an adjudicated basin planning process involving local water purveyors … Continue reading “Can Los Osos Valley Groundwater Basin Provide a Sustainable Water Supply?”
In accordance with the State Water Resources Control Board’s (SWRCB’s) Recycled Water Policy, the Upper Santa Clara River Integrated Regional Water Management Group (IRWMG), which is comprised of Castaic Lake Water Agency (CLWA), City of Santa Clarita, CLWA Santa Clarita Water Division (SCWD), Los Angeles County Flood Control District (LACFCD), Newhall County Water District (NCWD), San Gabriel & Lower … Continue reading “Salt and Nutrient Management Plan Santa Clara River Valley East Subbasin”
This memorandum presents proposed boundary modifications to Department of Water Resources’ (DWR) Bulletin 118 groundwater basins within the mid-Santa Cruz County area. These proposed modifications are submitted on behalf of the Soquel-Aptos Groundwater Management Committee (SAGMC), and consist primarily of consolidating four Bulletin 118 basins that make up the shared groundwater resource to be managed … Continue reading “Santa Cruz Mid-County Groundwater Basin Boundary Modification”
Numerous water bodies in California are listed under the Clean Water Act as being impaired due to mercury (Hg) contamination. The Surface Water Ambient Monitoring Program (SWAMP), via the Bioaccumulation Oversight Group (BOG), has recently completed statewide surveys of contaminants in sport fish tissue from more than 250 lakes and rivers in California and throughout … Continue reading “Estimating Exposure of Piscivorous Birds and Sport Fish to Mercury in California Lakes Using Prey Fish Monitoring—A Predictive Tool for Managers”