{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Claudia C. Faunt", "hasEmail": "mailto:ccfaunt@usgs.gov"}, "description": "This digital dataset defines the model grid, water-balance subregions (WBSs), soil types, and virtual crops for the five land-use \ntime-frames in the transient hydrologic model of the Central Valley flow system. The Central Valley encompasses an approximate \n50,000 square-kilometer region of California. The complex hydrologic system of the Central Valley is simulated using the USGS \nnumerical modeling code MODFLOW-FMP (Schmid and others, 2006a, b).  This simulation is referred to here as the Central Valley \nHydrologic Model (CVHM) (Faunt, 2009). Utilizing MODFLOW-FMP, the CVHM simulates groundwater- and surface-water flow, \nirrigated agriculture, land subsidence, and other key processes in the Central Valley on a monthly basis from 1961-2003.  The \ntotal active modeled area is 20,334 square-miles on a finite-difference grid comprising 441 rows and 98 columns. Slightly less \nthan 50 percent of the cells are active. The CVHM grid has a uniform horizontal discretization of 1x1 square mile and is oriented \nparallel to the valley axis, 34 degrees west of north (Faunt, 2009). The 21 WBSs initially were identified by the California Department \nof Water Resources (CA-DWR) and Bureau of Reclamation (BOR) as numbered \"Depletion Study Areas\" (California Department of \nWater Resources, 1977).  The WBSs are used as accounting units for surface-water delivery and for estimation of groundwater \npumpage. The boundaries generally represent hydrographic rather than political subdivisions, particularly in the San Joaquin and \nTulare Basins.  The soils were simplified into sandy loam, silty clay, and silt from the State Soil Geographic Database STATSGO \n(U.S. Department of Agriculture Natural Resources Conservation Service, 2005b).  The soil type covering the maximum area of each \ncell was assigned to each cell. The land-use attributes are defined in the model on a cell-by-cell basis and include urban and agricultural \nareas, water bodies, and natural vegetation. The land use, referred to as \"virtual crops,\" that covered the largest fraction of each 1 \nsquare mile model cell was the representative land use specified for that cell. Land-use maps were developed for five different time \nframes during the 42.5-year simulation period. The CVHM is the most recent regional-scale model of the Central Valley developed \nby the U.S. Geological Survey (USGS).  The CVHM was developed as part of the USGS Groundwater Resources Program (see \n\"Foreword\", Chapter A, page iii, for details).", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P941D0QK", "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.9389544b-cb79-418a-86f7-7e2ed99f8100.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_9389544b-cb79-418a-86f7-7e2ed99f8100", "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:9389544b-cb79-418a-86f7-7e2ed99f8100", "Ventura County", "Yolo County", "Yuba County", "geoscientificinformation", "groundwater", "hydrogeology", "hydrology", "inlandWaters", "land use", "model", "soil type", "virtual crop", "water balance"], "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": "Water-balance subregions (WBSs), soil types, and virtual crops for the five land-use time-frames used in the Central Valley Hydrologic Model (CVHM)"}