Studies and Reports

By Todd Engineers with Kennedy/Jenks Consultants Issued July 2013 The Baja and Centro Subareas are located in the lower portion of the Mojave River Basin, in the Western Mojave Desert. This Basin Conceptual Model was developed by integrating all previous studies, field investigations, and monitoring programs, providing a scientific foundation for groundwater management. The information presented includes local geology, land use, water use, climate and hydrologic conditions of the region through time. Understanding the hydrogeology and water supply and demand conditions of the Subareas is critical to future groundwater management

Final Report - No Appendices Baja / Centro Subarea Map Appendix A Subject-Specific Document Timelines for the Centro and Baja Subareas Appendix B Evaluation of Potential Impacts of Dams on MR Flows Appendix C Evaluation of Ungauged Local Runoff Appendix D Hydrogeologic Investigation of Camp Cady Wildlife Area Appendix E Summary of Well Hydraulic Information Appendix F USGS GW Model Water Budgets (1931 to 1999) Appendix G Historic Mining Randsburg, Red Mountain, Atolia Appendix H Alto Transition Zone Water Budget WYs 1994 to 2010 Appendix I Demand Projections for High and Low Conservation Assumptions

Publish Year: 2013

By W. Richard Laton, John Foster, Michael Blazevic, John Velarde, Michael Cruikshank In cooperation with the Mojave Water Agency Mojave Water Agency has worked closely with academic faculty and students of the Geological Sciences Department from the California State University at Fullerton (CSUF) to assist with studying groundwater resource management issues in the Oeste Subarea. This report analyses previously published data and new data on geology, hydrology, hydrogeology, groundwater chemistry, geography and climate

Oeste Report 2009 Oeste Hydrological Map 2009

Publish Year: 2009

A condensed version of the Oeste Hydrologic Sub-area Report to provide generalized information for public consumption.

Oeste Atlas

Publish Year: 2009

Prepared by Richard C. Slade & Associates LLC Issued 2008 This report provides the findings and conclusions of the hydrogeologic evaluation of the proposed Regional Recharge and Recovery Project that is located along/near the channel of the Mojave River in the vicinity of Hesperia. The project involves the construction of a put-and-take series of wells and transmission pipelines and the use of existing and proposed artificial spreading basins. The plan includes storing and artificially recharging surface water in new/proposed spreading basins in/along the Upper reach of the Mojave River, and extracting it at several new wells to the west and east of the river for conveyance to Victorville, Adelanto, Southern California Logistics Airport, and the Apple Valley region.

Hydrological Evaluation Report Hydrological Evaluation Map

Publish Year: 2008

By Kennedy/Jenks/Todd LLC Issued 2007 In this study, Bighorn-Desert View Water Agency and Mojave Water Agency evaluate management options for water resources in the southwestern Mojave Desert within the Ames Valley, Johnson Valley, and Means Valley groundwater basins. This study develops a technical foundation with the development of basin conceptual models describing the physical and hydraulic conditions for each groundwater basin. A second component includes analysis of current water supply and demand conditions of the region, with an assessment of future projections, supporting management decisions to ensure sustainable water supply.

Final Report Basin Map

Publish Year: 2007

URS Corporation (URS) and Dr. Shawn Biehler conducted a study to evaluate the results of hyperbolic density model construction using Complete Bouguer Anomaly data to refine basin depths and assess aquifer storage capacities. This Technical Memorandum presents a summary of 2 and 3-dimensional models based on hyperbolic density calculations for the depth to bedrock and a reassessment of the groundwater resources in the Transition Zone (TZ) Sub-area of the Mojave River Basin. Published on May 1, 2006

Technical Memorandum, Gravity Studies Figures 1 - 14

Publish Year: 2006

By Cal State University Fullerton, Department of Geological Sciences, Staff and Faculty In cooperation with the Mojave Water Agency Published 2005 This report provides information on the physiographic makeup, geomorphology, geology, stratigraphy, surface water drainage, groundwater flow, and water chemistry of the Este Hydrologic Sub-basin, located in the Lucerne Valley area. The compilation of data demonstrates water-rock interactions, and is used to construct a basin-wide conceptual model.

Estes Hydrological Atlas Hydrological Map

Publish Year: 2005

By Tracy Nishikawa, John A. Izbicki, Joseph A. Hevesi, Christina Stamos, Peter Martin In cooperation with the Joshua Basin Water District Published 2004 With concern for long term sustainability of ground water in the Joshua Tree and Copper Mountain ground-water basins, the USGS in cooperation with the Joshua Basin Water District, implemented this study to gain a better understanding of the basins’ geohydrologic framework. Local communities have historically relied on ground water as the sole source of water supply, and the need to implement an artificial recharge system may become necessary. Under the scope of this report, the USGS presents data for a better understanding of geohydrology of the ground-water basins, recharge development, and ground-water flow model. Included is a collection of water-level and water-quality data, geologic and electric logs, and gravity data.

Geohydrological Report hydrological Map

Publish Year: 2004

By Tracy Nishikawa, Jill N. Densmore, Peter Martin, Johathon Matti In cooperation with the Hi-Desert Water District and the Mojave Water Agency Published 2003 An artificial recharge program that began releasing imported water from the California State Water Project into recharge percolation ponds to supplement ground-water supply in Yucca Valley coincided with a spike in nitrate concentrations. The concentrations exceeded the U.S. Environmental Protection Agency maximum contaminant level. To understand the effects of present and future artificial recharge in the Warren subbasin, this study, by the U.S. Geological Survey in cooperation with Hi-Desert Water District and Mojave Water Agency , evaluates sources of increased nitrate concentrations that occurred after the start of the artificial recharge program, develops ground-water flow and solute transport models to better understand the source and transport of nitrates in the aquifer system, and utilizes the calibrated models to evaluate the possible effect of a proposed conjunctive-use project.

Water Source & Transport Evaluation Report Hydrological Map

Publish Year: 2003

By URS Corporation Published 2003 This report describes the interrelationship of hydrogeologic conditions governing the Transition Zone (TZ) water bridge concept. The water bridge is the physical and natural means by which surface and groundwater are conveyed to the Centro Subarea through the TZ from the upper Alto Subarea. Phase I also entails evaluating the potential for artificial recharge programs based on these interrelating concepts.

Phase 1 Report Hydrological Map

Publish Year: 2003

By URS Corporation Published 2003 This report was conducted to assess current and future water supply and demand conditions within the Transition Zone and estimate the market for imported water and viability of recharge projects.

Phase 2 Report Hydrological Map

Publish Year: 2003

By Christina L. Stamos, Peter Martin, Tracy Nishikawa, Brett F. Cox In cooperation with the Mojave Water Agency Published 2001 (Version 3) The proximity of the Mojave River ground-water basin to the highly urbanized Los Angeles region has led to rapid growth in population and, consequently, an increase in the demand for water. The Mojave River, the primary source of surface water for the region, normally is dry – except for a small stretch that has perennial flow and periods of flow after intense storms. As a result, the region relies almost entirely on ground water to meet its agricultural and municipal needs. Groundwater withdrawal since the late 1800’s has resulted in discharge, primarily from pumping wells, which exceeds natural recharge. To plan for anticipated water demands, and for the effects of imported water on the basin, methods are needed to evaluate and project ground-water conditions that result from present and planned changes in the basin. This study is part of a series of studies started in 1992 by the U.S. Geological Survey as a part of southern California Regional Aquifer-System Analysis (RASA) program, in cooperation with the Mojave Water Agency.

Groundwater Flow Simulation Report Hydrological Map

Publish Year: 2001