Unsaturated zone soil properties near a dry well and Four-plex baseball field, Fort Irwin National Training Center, San Bernardino County, California, 2019-2020
Dates
Publication Date
2020-08-18
Start Date
2020-12-02
End Date
2020-06-01
Citation
Kohel, C.A., Smith, G.A., Groover, K.D., and Peterson, M.F., 2020, Unsaturated zone soil properties near a dry well and Four-plex baseball field, Fort Irwin National Training Center, San Bernardino County, California, 2019-2020: U.S. Geological Survey data release, https://doi.org/10.5066/P9Z81IQU.
Summary
The U.S. Army Fort Irwin National Training Center (NTC), approximately 35 miles north-northeast of Barstow, California, obtains all of its potable water supply from three groundwater basins (Irwin, Langford, and Bicycle Basins) within the NTC boundaries. In these basins, groundwater withdrawals exceed natural recharge, resulting in water-level declines. However, managed aquifer recharge using recycled water (treated wastewater) has offset water-level declines in Irwin Basin. Additionally, localized water-quality changes have occurred in some parts of Irwin Basin as a result of human activities (for example, wastewater disposal practices, landscape irrigation, and (or) leaking pipes). As part of a research study in cooperation with [...]
Summary
The U.S. Army Fort Irwin National Training Center (NTC), approximately 35 miles north-northeast of Barstow, California, obtains all of its potable water supply from three groundwater basins (Irwin, Langford, and Bicycle Basins) within the NTC boundaries. In these basins, groundwater withdrawals exceed natural recharge, resulting in water-level declines. However, managed aquifer recharge using recycled water (treated wastewater) has offset water-level declines in Irwin Basin. Additionally, localized water-quality changes have occurred in some parts of Irwin Basin as a result of human activities (for example, wastewater disposal practices, landscape irrigation, and (or) leaking pipes). As part of a research study in cooperation with the U.S. Environmental Protection Agency (EPA) and the U.S. Army, the U.S. Geological Survey (USGS) evaluated unsaturated zone soil property data of cores from a borehole for a newly drilled monitoring well near a dry well and irrigated Four-plex baseball field. Measurements and observations are presented for cores from an initial drilling attempt (site ESW2A), which stopped at 85 feet below land surface due to equipment issues, and data are presented for cores from the successful drilling attempt (ESW2B) down to 240 feet below land surface. The two boreholes are located approximately 6 feet from each other. The grain size measurements were compared to a reference sample HMR2 collected as part of a previous study near Barstow.
Click on title to download individual files attached to this item.
Soil property data at Fort Irwin_metadata.xml Original FGDC Metadata
View
13.81 KB
application/fgdc+xml
Fort Irwin_soil_properties_site_information.csv
396 Bytes
text/csv
Purpose
This data release contains: 1) laboratory measurements of core material properties, including gravimetric measurements of water content and filter paper matric potential, as well as specific conductance leachate measurements; 2) Site observations of core material, including field lithologic descriptions, field drilling notes, and core material; and 3) grain size distributions measured using an automated particle size analyzer, and quality assurance data (including a sieve analysis) collected to verify the particle size analyzer results. These data were collected to support a study evaluating the vertical movement of water in the unsaturated zone, including an investigation of any hydrologic effects caused by a potential perching clay layer observed by EPA during previous site investigations.
