{"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 and hydraulic-property data arrays of the Multiplier (MULT) \nPackage used in the transient hydrologic model of the Central Valley flow system.  The MULT package \ndefines multiplier arrays for calculation of model-layer characteristics from parameter values. The Central \nValley encompasses an approximate 50,000 square-kilometer region of California. The complex hydrologic \nsystem of the Central Valley is simulated using the USGS numerical modeling code, MODFLOW-FMP \n(Schmid and others, 2006).  This simulation is referred to here as the Central Valley Hydrologic Model \n(CVHM) (Faunt, 2009). Utilizing MODFLOW-FMP, the CVHM simulates groundwater and surface-water \nflow, irrigated agriculture, land subsidence, and other key processes in the Central Valley on a monthly \nbasis from 1961-2003.  The total active modeled area is 20,334 square-miles on a finite-difference grid \ncomprising 441 rows and 98 columns. Slightly less than 50 percent of the cells are active. It has a uniform \nhorizontal discretization of 1x1 square mile and is oriented parallel to the valley axis, 34 degrees west of \nnorth (Faunt, 2009). The MULT Package includes the percentage of coarse-grained deposits in each of \nthe 10 model layers, specific yield, and the altitudes of the tops of model layers 1-4.  In order to better \ncharacterize the aquifer-system deposits, lithologic data from approximately 8,500 drillers' logs of boreholes \nranging in depth from 12 to 3,000 feet below land surface were compiled and analyzed. The percentage of \ncoarse-grained sediment, or texture, then was computed for each 50-foot depth interval of the drillers' logs. \nA 3-dimensional texture model was developed by interpolating the percentage of coarse-grained deposits \nonto a 1-mile spatial grid at 50-foot depth intervals from land surface to 2,800 feet below land surface. The \nspecific yield data were extrapolated from the percentage of coarse-grained deposits in model layer 1. The \nCVHM is the most recent regional-scale model of the Central Valley developed by the U.S. Geological \nSurvey (USGS).  The CVHM was developed as part of the USGS Groundwater Resources Program \n(see \"Foreword\", Chapter A, page iii, for details).", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9XPUC4V", "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.8ebfce27-53f9-416c-92a9-aee117353052.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_8ebfce27-53f9-416c-92a9-aee117353052", "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:8ebfce27-53f9-416c-92a9-aee117353052", "Ventura County", "Yolo County", "Yuba County", "environment", "geoscientificInformation", "groundwater", "hydraulic head", "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": "Model-grid and hydraulic-property data arrays of the MULT package of the Central Valley Hydrologic Model"}