{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Claudia C. Faunt", "hasEmail": "mailto:ccfaunt@usgs.gov"}, "description": "This digital dataset contains the categories used to classify the basin-fill deposits in the Central Valley as either \ncoarse-grained or fine-grained deposits. This classification was used to develop the texture model which was used \nas input data for the hydraulic properties portion of the Central Valley Hydrologic Model (CVHM).  The Central Valley \nencompasses an approximate 50,000 square-kilometer region of California. The complex hydrologic system of the \nCentral Valley is simulated using the U.S. Geological Survey (USGS) numerical modeling code MODFLOW-FMP \n(Schmid and others, 2006).  This simulation is referred to here as the CVHM (Faunt, 2009). Utilizing MODFLOW-FMP, \nthe CVHM simulates groundwater and surface-water flow, irrigated agriculture, land subsidence, and other key processes \nin the Central Valley on a monthly basis from 1961-2003.  The total active modeled area is 20,334 square-miles on a \nfinite-difference grid comprising 441 rows and 98 columns. Slightly less than 50 percent of the cells are active.  The \nCVHM model grid has a uniform horizontal discretization of 1x1 square mile and is oriented parallel to the valley axis, \n34 degrees west of north (Faunt, 2009). In order to better characterize the aquifer-system deposits, lithologic data \nfrom approximately 8,500 well-driller logs of boreholes ranging in depth from 12 to 3,000 feet below land surface were \ncompiled and analyzed. The percentage of coarse-grained sediment, or texture, then was computed from this classification \nfor each 50-foot depth interval of the logs. A 3D texture model was developed by interpolating the percentage of \ncoarse-grained deposits onto a 1-mile spatial grid at 50-foot depth intervals from land surface to 2,800 feet below \nland surface. The CVHM is the most recent regional-scale model of the Central Valley developed by the USGS.  \nThe CVHM was developed as part of the USGS Groundwater Resources Program (see \"Foreword\", Chapter A, \npage iii, for details).", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9Y5I0ZP", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.506eab3e-4d5c-42df-a1f7-4fb635aa5875.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_506eab3e-4d5c-42df-a1f7-4fb635aa5875", "keyword": ["Alameda County", "Amador County", "Butte County", "CV-RASA", "Calaveras County", "California", "Central Valley", "Central Valley Aquifer", "Central Valley Hydrologic Model", "Central Valley, California", "Colusa County", "Contra Costa County", "El Dorado County", "Flow Model CVHM", "Fresno County", "Glenn County", "Groundwater Availability of the Central Valley Aquifer", "Humboldt County", "Kern County", "Kings County", "Lake County", "Madera County", "Mariposa County", "Mendocino County", "Merced County", "Monterey County", "Napa County", "Nevada County", "Placer County", "Sacramento County", "Sacramento Valley", "San Benito County", "San Joaquin County", "San Joaquin Valley", "San Luis Obispo County", "Santa Barbara County", "Santa Clara County", "Shasta County", "Solano County", "Sonoma County", "Stanislaus County", "Sutter County", "Tehama County", "Texture Model", "Trinity County", "Tulare County", "Tuolumne County", "USGS:506eab3e-4d5c-42df-a1f7-4fb635aa5875", "Ventura County", "Yolo County", "Yuba County", "coarse-grained", "deposit", "environment", "fine-grained", "geoscientificInformation", "groundwater", "hydrogeology", "hydrology", "inlandWaters", "model"], "modified": "2020-11-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-123.831528, 34.519871, -117.916328, 40.748631", "theme": ["geospatial"], "title": "Categories used to classify the basin-fill deposits in the Central Valley"}