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Location Folder Show Tree ROOT _ScienceBase Catalog __USGS California Water Science Center CAWSC Data Releases (Published) Links to Other Content of Interest Filters Date Range Past year (91) Past month (24) Past week (5) Past day (0) Custom range... To   Search Extensions Shapefile (42) Raster (14) ArcGIS Service Definition (1) Types Map Service (113) OGC WFS Layer (100) OGC WMS Layer (100) OGC WMS Service (60) Downloadable (57) More... Contacts California Water Science Center U.S. Geological Survey Water Resources U.S. Geological Survey, SOUTHWEST REGION Michelle L Hladik More... Categories Data Release - Revised (18) Data Release - Under Revision (2) Data Release - In Progress (1) Tag Types Theme (333) Place (325) USGS Scientific Topic Keyword (189) Harvest Set (221) Types (1) Subject (1) Tag Schemes USGS Thesaurus (249) None (151) ISO 19115 Topic Category (257) Common geographic areas (126) Geographic Names Information System (GNIS) (47) Common Geographic Areas (38) USGS (14) More... View Results as: JSON ATOM CSV Browse Folder

Study Area Boundary Malakoff DIggins State Historic Park, California One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive terrain. This data release includes a 2014 digital elevation model (DEM), a study area boundary, and a geomorphic map. The 2014 DEM was derived from an available aerial LiDAR dataset collected in 2014 by the California Department of Conservation. The geomorphic map was derived for the study area from using a multi-scale spatial analysis. A topographic... Categories: Data; Types: Citation, Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Humbug Creek, Malakoff Diggins State Historic Park, digital elevation models, elevation, erosion, All tags... placer mine, sedimentation, Fewer tags Table4. Hydrologic disturbance classification used to describe anthropogenic impairments for gaged basins located in the Northwest Volcanic Aquifer Study Area, USA The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) (https://water.usgs.gov/ogw/gwrp/activities/regional.html) supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study Area (NVASA), estimates of runoff and baseflow were determined for 312 streamflow-gaging stations from 1904 to 2015. Gages with complete water years (October to September) of continuous-streamflow record were used to partition streamflow into runoff and baseflow, which is that part of streamflow attributed to groundwater discharge. For each water year annual estimates of baseflow, runoff, and a base-flow... Categories: Data; Tags: California, GWToolbox, Idaho, NVASA, NVASA, All tags... Oregon, USGS Water Availability and Use Study Program, baseflow, hydrograph separation, inlandWaters, runoff, volcanic aquifers, Fewer tags Otolith chemistry of fishes in Rodeo Lagoon, Marin County, California, 2016 The dataset includes multiple file types (CSV, ArcGIS shapefiles, and images), data relates to the elemental analysis of fish otoliths. Otoliths examined in this study were from randomly-sampled individual Tidewater Goby (Eucyclogobius newberryi) and Prickly Sculpin (Cottus asper) from the adult population of Rodeo Lagoon and Rodeo Creek, Marin County, California. The fish were collected in April and August 2016. Categories: Data; Tags: Aquatic Biology, California, Coastal fishes, Ecology, Environmental Health, All tags... Marin County, Otolith chemistry, Rodeo Lagoon, USGS Science Data Catalog (SDC), United States, Water Resources, Wildlife Biology, biota, coastal ecosystems, ecology, environment, marine biology, marine chemistry, oceans, Fewer tags Table 1. Station descriptions for 312 continuous-record streamflow gages, used to estimate runoff and baseflow using six hydrograph-separation methods, in the Northwest Volcanic Aquifer Study Area, USA The U.S. Geological Survey’s Water Availability and Use Study Program (WAUSP) (https://water.usgs.gov/ogw/gwrp/activities/regional.html) supports quantitative assessments of groundwater availability in areas of critical importance. As part of a WAUSP study in the arid to semi-arid Northwest Volcanic Aquifer Study Area (NVASA), estimates of runoff and baseflow were determined for 312 streamflow-gaging stations from 1904 to 2015. Gages with complete water years (October to September) of continuous-streamflow record were used to partition streamflow into runoff and baseflow, which is that part of streamflow attributed to groundwater discharge. For each water year annual estimates of baseflow, runoff, and a base-flow... Categories: Data; Tags: California, GWToolbox, Idaho, NVASA, NVASA, All tags... Oregon, USGS Water Availability and Use Study Program, baseflow, hydrograph separation, inlandWaters, runoff, volcanic aquifers, Fewer tags 1992 digital surface model Malakoff Diggins State Historic Park, California One of the largest hydraulic mines (1.6 km2) is located in California’s Sierra Nevada within the Humbug Creek watershed and Malakoff Diggins State Historic Park (MDSHP). MDSHP’s denuded and dissected landscape is composed of weathered Eocene auriferous sediments susceptible to chronic rill and gully erosion whereas block failures and debris flows occur in more cohesive terrain. This data release includes a 1992 digital surface model (DSM), 1992 orthophoto mosaic, masked orthophoto of the study area, 1992 ground cover classification, and 1992 pruned DSM with the vegetation bias removed. Stereo-photogrammetry was used to create a 1992 digital surface model (DSM) and orthophoto mosaic from archived aerial photographs.... Categories: Data; Types: Citation, Downloadable, GeoTIFF, Map Service, Raster; Tags: Humbug Creek, Malakoff Diggins State Historic Park, aerial photography, digital elevation models, elevation, All tags... erosion, orthomosaic, photogrammetry, placer mine, remote sensing, sedimentation, Fewer tags Abundance and Distribution of Fishes in the Northern Sacramento-San Joaquin Delta, California, 2017-2018 (ver. 1.1, December 2019) This dataset includes field data for fishes sampled using gill nets during daylight hours in the Northern Sacramento-San Joaquin Delta, California, USA. This data release includes all measured environmental parameters and fish taxa included in the analysis. First posted - August 19, 2019 (available from author) Revised - December 18, 2019 (version 1.1) Categories: Data, Data Release - Revised; Tags: Aquatic Biology, Aquatic Biology, Cache Slough Complex, California, Ecology, All tags... Fish Ecology, Habitat Restoration, North Delta, Sacramento-San Joaquin Delta, Tidal Wetland, USGS Science Data Catalog (SDC), United States, Wildlife Biology, biota, Fewer tags Data for Tritium deposition in precipitation in the United States, 1953 - 2023 (ver. 2.0, May 2023) This data release documents three Microsoft Excel tables (and corresponding comma separated data files) that contain estimates of tritium in precipitation data for the continental United States. Versions of this data release contain additional tritium data for more recent years. The current version has tritium data through 2022. Table 1 contains estimates of tritium in precipitation for precipitation stations located in the continental United States. Measured precipitation data are formatted in regular font while correlated data are italicized. Table 2 contains tritium in precipitation for ninety-six 2-degree latitude by 5-degree longitude quadrangles covering the continental U.S. Latitudes are north of the equator... Categories: Data, Data Release - In Progress; Tags: Tritium, USGS Science Data Catalog (SDC), continental United States, groundwater, groundwater age, All tags... precipitation, tracers, water quality, Fewer tags Aquifer test data for the Belridge multiple-well monitoring site (BWSD), Kern County, California To determine aquifer characteristics, pneumatic slug tests were performed on selected zones and aquifers at a monitoring site near the North and South Belridge oil fields in the Southern San Joaquin Valley in Kern County. On November 19th and 20th, 2018, pneumatic slug tests were performed at five monitoring wells located at the multiple-well groundwater-monitoring site BWSD (28S/21E-08M1 through –M5) near Lost Hills, CA in the Southern San Joaquin Valley. Data were collected using In-Situ LevelTROLL 500 30psig pressure transducers set to record the depth to water level below land surface at one second intervals. Computations were performed using Aqtesolv software and analyzed using the KGS Model package for overdamped... Categories: Data; Tags: California, Hydrology, Kern, North Belridge oil field, South Belridge oil field, All tags... Southern San Joaquin Valley, USGS Science Data Catalog (SDC), Water Resources, aquifer test, groundwater flow, hydraulic conductivity observations, inlandWaters, slug test, Fewer tags Modern groundwater-quality, depth, and well-construction data for selected wells in the San Joaquin Valley, California, 1993-2015 Groundwater-quality data collected between 1993 and 2015 were compiled from the U.S. Geological Survey (USGS) National Water Information System (NWIS) database for 722 wells in the San Joaquin Valley (SJV). Groundwater-quality data retrieved included lab analyses of complete major ion data (calcium, magnesium, sodium, potassium, chloride, sulfate, nitrate, alkalinity, bicarbonate, carbonate, silica, and TDS) for 613 samples, and an additional 109 samples with measured values of specific conductance. Most of these wells were sampled as part of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project or the USGS National Water Quality Assessment (NAWQA) Program. In addition... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Agriculture, California, Central Valley, Environment, GAMA, All tags... Geochemistry, Geographic Information Systems (GIS), Groundwater, Hydrogeology, Hydrology, NAWQA, PHREEQC, Public Supply Water Use, San Joaquin Valley, Total Dissolved Solids (TDS), Trends, United States, Water Quality, Fewer tags Historical produced water chemistry data compiled for the Orcutt and Oxnard oil fields, Santa Barbara and Ventura Counties, southern California This digital dataset represents historical geochemical and other information for 58 sample results of produced water from 56 sites in the Orcutt and Oxnard oil fields in Santa Barbara and Ventura Counties, respectively, in southern California. Produced water is a term used in the oil industry to describe water that is produced as a byproduct along with the oil and gas. The locations from which these historical samples were collected include 20 wells (12 in the Oxnard oil field and 8 in the Orcutt oil field). The top and bottom perforations are known for all except one (Dataset ID 33) of these wells. Additional sample sites include 13 storage tanks, and 13 unidentifiable sources. Two of the storage tanks (Dataset... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Geochemistry, USGS Science Data Catalog (SDC), Water Quality Petroleum well data used for preliminary regional groundwater salinity mapping near selected oil fields in central and southern California This digital dataset is comprised of two separate data files that contain total dissolved solids, well construction, and well identifying information for 1,131 petroleum wells used to map salinity in and around 31 southern and central California oil fields. Salinity mapping was done for 27 fields located in the southern San Joaquin Valley of Kern County (North Belridge, South Belridge, Canfield Ranch, North Coles Levee, South Coles Levee, Cymric, Edison, Elk Hills, Fruitvale, Greeley, Jasmin, Kern Bluff, Kern Front, Kern River, Lost Hills, Mount Poso, Mountain View, Poso Creek, Rio Bravo, Rosedale, Rosedale Ranch, Round Mountain, San Emidio Nose, Tejon, Ten Section, Wheeler Ridge, and Yowlumne), 3 fields in the... Categories: Data; Tags: California, Central Coastal Basins, Los Angeles Basin, San Joaquin Valley, groundwater, All tags... oil field, petroleum well, salinity, total dissolved solids, Fewer tags Historical produced water chemistry data compiled for the Edison, Mountain View, and Ant Hill Oil Fields and vicinity, Kern County, California This digital dataset contains historical geochemical and other information for 481 samples of produced water (PW) from 408 sites in the Edison, Mountain View, and Ant Hill Oil Fields in Kern County, California. Produced water is a term used in the oil industry to describe water that is produced from oil wells as a byproduct along with the oil and gas. The locations from which these historical samples have been collected include 199 wells, 67 sumps, 43 storage tanks (not associated with a specific well), and 104 unidentifiable sample sources which could not be classified because of insufficient information. The wells include 176 sites identifiable by an API (American Petroleum Institute) number and 23 sites for which... Categories: Data; Tags: California, Kern County, environment, geochemistry, geoscientificInformation, All tags... hydrocarbons, major and minor ions, naturally occurring radioactive material, nutrients, oil field, oil well, produced water, trace elements, volatile organic compounds, water quality, water quality indicators, Fewer tags Marine Observations of Longfin Smelt Spirinchus thaleichthys in the northeast Pacific Ocean This dataset is a compilation of Longfin Smelt observations from multiple sources, including research institutions and museums, and local, state, and federal fisheries agencies. Categories: Data; Tags: Aquatic Biology, Ecology, Fish ecology, Longfin Smelt, Northeast Pacific, All tags... Pacific Ocean, Spirinchus thaleichthys, USGS Science Data Catalog (SDC), biota, Fewer tags Central Valley Hydrologic Model version 2 (CVHM2): Small Watershed Climate Data (Recharge, Runoff) This digital dataset consists of monthly climate data from the Basin Characterization Model v8 (BCMv8) for the updated Central Valley Hydrologic Model (CVHM2) for water years 1922 to 2019. The BCMv8 data are available in a separate data release titled "The Basin Characterization Model - A regional water balance software package (BCMv8) data release and model archive for hydrologic California, water years 1896-2020". The data were modified by: (1) extracting the data from the data source for the relevant model domain and times, and (2) rescaling the 270-meter BCMv8 grid to the small watersheds that contribute boundary flow to the CVHM2 model for the hydrologic variables recharge and runoff. The three data pieces... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Central Valley, Climate, Hydrology, Potential Evapotranspiration, All tags... Precipitation, United States, Water Budget, climatologyMeteorologyAtmosphere, environment, farming, geoscientificInformation, Fewer tags Field portable X-ray fluorescence data for Hinkley and Water Valleys, San Bernardino County, California These data were collected using field portable (handheld) X-ray fluorescence (pXRF) equipped with a 4-watt Ta/Au X-ray tube. Samples of surficial alluvium, rock, and archived core material from existing auger- or sonic-drilled monitoring wells in Hinkley Valley and the adjoining Water Valley, 140 kilometers (km) northeast of Los Angeles, California, were measured as part of an investigation of naturally-occurring and anthropogenic hexavalent chromium, Cr(VI), concentrations in local groundwater. Surficial alluvium samples were collected from small stream channels draining distinct geologic units, or from previously mapped river deposits, and generally consisted of silt, sand, and granules to small pebbles. Twigs... Categories: Data; Tags: Arsenic, California, Chromium, Geochemistry, Hinkley, All tags... San Bernardino County, Uranium, Western Mojave Desert, X-ray fluorescence, environment, Fewer tags Russian River Integrated Hydrologic Model (RRIHM): Agricultural Water Use Package (AG) This dataset is a comma separated file of agricultural fields, ponds, surface diversions and wells used to generate the Agricultural package (AG). Categories: Data; Tags: California, Russian River, United States, environment, groundwater, All tags... groundwater and surface-water interaction, groundwater level, hydrology, modeling, precipitation (atmospheric), streamflow, surface water (non-marine), water resources, Fewer tags Historical produced water chemistry data compiled for selected oil fields in Los Angeles and Orange Counties, southern California This digital dataset contains historical geochemical and other information for 200 samples of produced water from 182 sites in 25 oil fields in Los Angeles and Orange Counties, southern California. Produced water is a term used in the oil industry to describe water that is produced as a byproduct along with the oil and gas. The locations from which these historical samples have been collected include 152 wells. Well depth and (or) perforation depths are available for 114 of these wells. Sample depths are available for two additional wells in lieu of well or perforation depths. Additional sample sites include four storage tanks, and two unidentifiable sample sources. One of the storage tank samples (Dataset ID 57)... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Geochemistry, USGS Science Data Catalog (SDC), Water Quality Vertical Distribution of Longfin Smelt in the San Francisco Estuary (ver. 3.0, February 2021) Field data for fishes sampled using mid-water trawls, otter trawls, and the SmeltCam during day and night in San Pablo Bay, CA. This data release includes all measured environmental parameters and fish taxa included in the analysis. Categories: Data, Data Release - Revised; Tags: Aquatic Biology, California, Fish Ecology, Longfin Smelt, San Francisco Bay-Delta, All tags... San Pablo Bay, Spirinchus thaleichthys, USGS Science Data Catalog (SDC), biota, Fewer tags Groundwater-Quality Data in the Redding-Red Bluff Shallow Aquifer Study Unit, 2018-2019: Tables The U.S. Geological Survey collected groundwater samples from 50 wells used for domestic and small system drinking water supplies in Shasta and Tehama Counties, California in 2018-2019. The wells were sampled for the Redding-Red Bluff Shallow Aquifer Study Unit of the California State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project’s assessment of the quality of groundwater resources used for domestic and small system drinking water supplies. Domestic and small-system wells are commonly screened at shallower depths than public-supply wells. Wells in the study unit generally tap unconsolidated to moderately consolidated coarse and fine-grained sediments... Categories: Data; Tags: California, Environment, GAMA, Groundwater, Groundwater Ambient Monitoring and Assessment Program, All tags... Shasta County, Tehama County, United States, Water-Quality, environment, geoscientificInformation, Fewer tags Little Holland Tract and Wildlands Flux Study; Zooplankton, Phytoplankton, and Larval Fish Taxonomic Data, 2017-2018 This data set includes taxonomic data for zooplankton, larval fish, and phytoplankton sampled in Little Holland Tract and Liberty Island Conservation Bank, in the northern Sacramento-San Joaquin River Delta, California. Zooplankton and larval fish were collected with target specific trawl nets and phytoplankton was collected from water grabs. This data release includes all measured environmental parameters. Categories: Data; Tags: Aquatic Biology, Aquatic Biology, California, Ecology, Rio Vista, All tags... Sacramento, San Joaquin Delta, Tidal Wetland, USGS Science Data Catalog (SDC), United States, Water Quality, aquatic biology, biological taxonomy, biota, environment, phytoplankton, plankton, Fewer tags 1 2 3 4 5 ... 18 »