{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Claudia C. Faunt", "hasEmail": "mailto:ccfaunt@usgs.gov"}, "description": "This digital dataset contains the percentage of coarse-grained deposits in wells in 15 meter increments \nand the percentage of coarse-grained deposits in texture model lattice points interpolated from the well \ndata for the Central Valley. The texture model was used as input data for the hydraulic properties portion \nof the Central Valley Hydrologic Model (CVHM).  The Central Valley encompasses an approximate 50,000 \nsquare-kilometer region of California. The complex hydrologic system of the Central Valley is simulated \nusing the U.S. Geological Survey (USGS) numerical modeling code MODFLOW-FMP (Schmid and others, \n2006).  This simulation is referred to here as the CVHM (Faunt, 2009). Utilizing MODFLOW-FMP, the \nCVHM simulates groundwater and surface-water flow, irrigated agriculture, land subsidence, and other key \nprocesses in the Central Valley on a monthly basis from 1961-2003.  The total active modeled area is 20,334 \nsquare-miles on a finite-difference grid comprising 441 rows and 98 columns. Slightly less than 50 percent \nof the cells are active. The CVHM model grid has a uniform horizontal discretization of 1x1 square mile and \nis oriented parallel to the valley axis, 34 degrees west of north (Faunt, 2009). In order to better characterize \nthe aquifer-system deposits, lithologic data from approximately 8,500 well-drillers logs of boreholes ranging \nin depth from 12 to 3,000 feet below land surface were compiled and analyzed. The percentage of coarse-grained \nsediment, or texture, then was computed from this classification for each 50-foot depth interval of the driller's \nlogs. A 3D texture model was developed by interpolating the percentage of coarse-grained deposits onto a 1-mile \nspatial grid at 50-foot depth intervals from land surface to 2,800 feet below land surface. The CVHM is the most \nrecent regional-scale model of the Central Valley developed by the USGS.  The CVHM was developed as part \nof the USGS Groundwater Resources Program (see \"Foreword\", Chapter A, page iii, for details).", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9ESIXW2", "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.a53bb527-441b-4d84-af83-48a84339d829.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_a53bb527-441b-4d84-af83-48a84339d829", "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:a53bb527-441b-4d84-af83-48a84339d829", "Ventura County", "Yolo County", "Yuba County", "deposit", "geostatistics", "groundwater", "hydrogeology", "hydrology", "inlandWaters", "model", "unconsolidated sediments"], "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": "Percent Coarse in wells in 15 meter increments and Texture Model Percent Coarse at Lattice Points for the Central Valley from Faunt (2009)"}