Geohydrology and Water Quality of Marine Corps Logistics Base, Nebo and YermoAnnexes Near Barstow, California

摘要

The purpose of this study is to define the relationship between the Mojave River,and the Mojave River aquifer and regional aquifer in the Marine Corps Logistics Base area east of Barstow, California. This was accomplished by evaluating new geologic and hydrologic data collected during 1992-95, along with existing data. This report describes the data and interpretations of geologic and hydrologic studies done by the USGS during 1992-95 at the Marine Corps Logistics Base, Nebo and Yermo Annexes. A conceptual model of the subsurface geology was produced by analyzing cuttings and geophysical data from several boreholes. The hydrologic conditions at the Nebo and Yermo Annexes were determined by measuring water levels and collecting water-quality samples from eight new multiple-well monitoring sites installed on the Marine Corps Logistics Base property and from numerous pre-existing wells. Oxygen-18, deuterium, tritium, and carbon-14 data were collected to determine the source, movement, and relative age of the ground water in the study area.