The San Antonio Creek Valley watershed (SACVW) is located in western Santa Barbara County about 15 miles (mi) south of Santa Maria, California and 55 mi north of Santa Barbara, California. The SACVW, is about 140 square miles and encompasses the San Antonio Creek Valley groundwater basin. Since the late 1800s, groundwater has been the primary source of water for agricultural, military, municipal, and domestic uses. Groundwater withdrawal from pumping has exceeded the amount of water replenishing the basin, causing groundwater declines of more than 150 feet in parts of the valley between 1947 and 2018, and reducing base flow in San Antonio Creek at the western end of the SACVW. Agricultural water use (primarily for the present-day irrigation of vineyards, and fruit and berry crops), and the lack of other sources of water, has, and will continue to strain the sustainability of the groundwater system. To address these concerns, the Santa Barbara County Water Agency and Vandenberg Space Force Base invited the U.S. Geological Survey (USGS) to engage in a cooperative study to develop a better understanding of the hydrogeologic system, and to provide tools to help evaluate and manage the effects of future development of the San Antonio Creek Valley groundwater basin, and in the encompassing SACVW. Datasets collected as part of this effort were used to assist in the development a numerical integrated hydrologic model of the SACVW. As part of this study the USGS collected hydrogeologic field data and developed a three-dimensional hydrogeologic framework model (HFM) of the SACVW. Hydrogeologic field data included streambed infiltrometer and aquifer slug tests, and measurements from streambed electrical resistivity instruments and temperature rod sensors. The HFM provided a quantitative framework of the aquifer system, including the thickness and extent of each of six hydrogeologic units that comprise the basin-fill aquifer. Infiltrometer tests provided data that can be used to estimate infiltration rate, streambed hydraulic conductivity and specific yield in the SACVW. Aquifer slug tests provided data that can be used to estimate hydraulic conductivity of aquifer units. Streambed electrical resistivity instruments provided data that can be used to estimate stream intermittency and flow patterns, and temperature rod sensors provided data that can be used to estimate streamflow infiltration.

The San Antonio Creek Valley watershed (SACVW) is located in western Santa Barbara County about 15 miles (mi) south of Santa Maria, California and 55 mi north of Santa Barbara, California. The SACVW, is about 140 square miles and encompasses the San Antonio Creek Valley groundwater basin; From the late 1800s, groundwater has been the primary source of water for agricultural, military, municipal, and domestic uses. Groundwater withdrawal from pumping has exceeded the amount of water replenishing the basin, causing groundwater declines of more than 150 feet in parts of the valley between 1943 and 2017, and reducing base flow in San Antonio Creek at the western end of the SACVW. Agricultural water use (primarily for the present-day irrigation of vineyards, and bush fruit and berry crops), and the lack of other sources of water, has, and will continue to strain the sustainability of the groundwater system. To address these concerns, the U.S. Geological Survey (USGS) entered into a cooperative agreement with the Santa Barbara County Water Agency and Vandenberg Space Force Base to develop a better understanding of the hydrogeologic system, and to provide tools to help evaluate and manage the effects of future development of the San Antonio Creek Valley groundwater basin, and in the encompassing SACVW. These datasets collected in this effort are being used to assist in the development a numerical integrated hydrologic model of the SACVW. As part of this study the USGS collected hydrogeologic field data. Field data included streambed infiltrometer and aquifer slug tests, and measurements from streambed electrical resistivity instruments and temperature rod sensors. Infiltrometer tests provided data that can be used to estimate infiltration rate, streambed hydraulic conductivity and specific yield in the SACVW. Aquifer slug tests provided data that can be used to estimate hydraulic conductivity of aquifer units. Streambed electrical resistivity instruments provided data that can be used to estimate stream intermittency and flow patterns, and temperature rod sensors provided data that can be used to estimate streamflow infiltration.

The San Antonio Creek Valley watershed (SACVW) is located in western Santa Barbara County about 15 miles (mi) south of Santa Maria, California and 55 mi north of Santa Barbara, California. The SACVW, is about 140 square miles and encompasses the San Antonio Creek Valley groundwater basin; From the late 1800s, groundwater has been the primary source of water for agricultural, military, municipal, and domestic uses. Groundwater withdrawal from pumping has exceeded the amount of water replenishing the basin, causing groundwater declines of more than 150 feet in parts of the valley between 1943 and 2017, and reducing base flow in San Antonio Creek at the western end of the SACVW. Agricultural water use (primarily for the present-day irrigation of vineyards, and bush fruit and berry crops), and the lack of other sources of water, has, and will continue to strain the sustainability of the groundwater system. To address these concerns, the U.S. Geological Survey (USGS) entered into a cooperative agreement with the Santa Barbara County Water Agency and Vandenberg Space Force Base to develop a better understanding of the hydrogeologic system, and to provide tools to help evaluate and manage the effects of future development of the San Antonio Creek Valley groundwater basin, and in the encompassing SACVW. These datasets collected in this effort are being used to assist in the development a numerical integrated hydrologic model of the SACVW. As part of this study the USGS collected hydrogeologic field data. Field data included streambed infiltrometer and aquifer slug tests, and measurements from streambed electrical resistivity instruments and temperature rod sensors. Infiltrometer tests provided data that can be used to estimate infiltration rate, streambed hydraulic conductivity and specific yield in the SACVW. Aquifer slug tests provided data that can be used to estimate hydraulic conductivity of aquifer units. Streambed electrical resistivity instruments provided data that can be used to estimate stream intermittency and flow patterns, and temperature rod sensors provided data that can be used to estimate streamflow infiltration.

This data release contains digital data generated by the U.S. Geological Survey under cooperative agreements with San Bernardino Valley Municipal Water District to characterize the three-dimensional hydrogeology of the Yucaipa groundwater subbasin, located east of Los Angeles in southern California. This dataset contains borehole lithologic data, and geospatial data of a three-dimensional hydrogeologic framework model (HFM).The borehole dataset is released as a series of .csv ascii files including (1) individual borehole location, and (2) downhole lithologic interval data derived from well drillers’ lithology logs and parsed to a series of textural descriptors. The geospatial data include polygon and polyline feature classes that are a 2-dimensional representations of the HFM. The polygon feature class is a cellular array where each model cell has multiple attributes including XY location, and interpolated elevations and thicknesses of the hydrogeologic units. The polyline feature class is a series of lines that represent the extent and location of faults included in the HFM. Sources of geologic and hydrogeologic data can be found in the metadata.

This data release contains digital data generated by the U.S. Geological Survey under cooperative agreements with San Bernardino Valley Municipal Water District to characterize the three-dimensional hydrogeology of the Yucaipa groundwater subbasin, located east of Los Angeles in southern California. This dataset contains borehole lithologic data, and geospatial data of a three-dimensional hydrogeologic framework model (HFM).The borehole dataset is released as a series of .csv ascii files including (1) individual borehole location, and (2) downhole lithologic interval data derived from well drillers’ lithology logs and parsed to a series of textural descriptors. The geospatial data include polygon and polyline feature classes that are a 2-dimensional representations of the HFM. The polygon feature class is a cellular array where each model cell has multiple attributes including XY location, and interpolated elevations and thicknesses of the hydrogeologic units. The polyline feature class is a series of lines that represent the extent and location of faults included in the HFM. Sources of geologic and hydrogeologic data can be found in the metadata.

The U.S. Geological Survey (USGS) entered into cooperative agreements with the Santa Barbara County Water Agency and Vandenberg Space Force Base to conduct a hydrologic resource assessment and develop an integrated numerical hydrologic model of the San Antonio Creek Valley watershed (SACVW). As part of this study, the USGS developed a digital three-dimensional hydrogeologic framework model (HFM). This dataset contains a geospatial database related to the digital HFM, individual geographic information system (GIS) shapefiles from the geodatabase, and borehole data used to support development of the HFM in a Microsoft Excel workbook (*.xlsx extension). The geospatial database contains the following data elements: (1) a boundary polygon that defines the HFM extent; (2) line features that define the location of faults used in the HFM; (3) a point dataset defining location of boreholes used in HFM construction; and (4) a polygon feature class containing interpolated elevations and thicknesses of hydrogeologic units as a cellular array. The spatial data are accompanied by non-spatial tables that describe the sources of geologic information, a glossary of terms, a description of model units, and a Data Dictionary. Spatial data are also presented as shapefiles and borehole data are provided in Mircosoft Excel spreadsheet.

The U.S. Geological Survey (USGS) entered into cooperative agreements with the Santa Barbara County Water Agency and Vandenberg Space Force Base to conduct a hydrologic resource assessment and develop an integrated numerical hydrologic model of the San Antonio Creek Valley watershed (SACVW). As part of this study, the USGS developed a digital three-dimensional hydrogeologic framework model (HFM). This dataset contains a geospatial database related to the digital HFM, individual geographic information system (GIS) shapefiles from the geodatabase, and borehole data used to support development of the HFM in a Microsoft Excel workbook (*.xlsx extension). The geospatial database contains the following data elements: (1) a boundary polygon that defines the HFM extent; (2) line features that define the location of faults used in the HFM; (3) a point dataset defining location of boreholes used in HFM construction; and (4) a polygon feature class containing interpolated elevations and thicknesses of hydrogeologic units as a cellular array. The spatial data are accompanied by non-spatial tables that describe the sources of geologic information, a glossary of terms, a description of model units, and a Data Dictionary. Spatial data are also presented as shapefiles and borehole data are provided in Mircosoft Excel spreadsheet.

This map shows the USGS (United States Geologic Survey), NWIS (National Water Inventory System) Hydrologic Data Sites for San Juan County, Utah. The scope and purpose of NWIS is defined on the web site: http://water.usgs.gov/public/pubs/FS/FS-027-98/

This data release contains California Department of Water Resource borehole data that were regularized by the US Geological Survey. This dataset contains borehole lithologic data, and geospatial data of water wells in the Hat Creek basin California, located east of Mount Shasta in southern California. The borehole dataset is released as an excel table and includes (1) individual borehole location, and (2) downhole lithologic interval data derived from well drillers’ lithology logs.

This data release contains California Department of Water Resource borehole data that were regularized by the US Geological Survey. This dataset contains borehole lithologic data, and geospatial data of water wells in the Hat Creek basin California, located east of Mount Shasta in southern California. The borehole dataset is released as an excel table and includes (1) individual borehole location, and (2) downhole lithologic interval data derived from well drillers’ lithology logs.