{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Claudia C. Faunt", "hasEmail": "mailto:ccfaunt@usgs.gov"}, "description": "This digital dataset contains the compaction data for 24 extensometers used for observations \nin the Central Valley Hydrologic Model (CVHM).  The Central Valley encompasses an approximate \n50,000 square-kilometer region of California. The complex hydrologic system of the Central Valley \nis simulated using the USGS numerical modeling code MODFLOW-FMP (Schmid and others, 2006).  \nThis simulation is referred to here as the CVHM (Faunt, 2009). Utilizing MODFLOW-FMP, the CVHM \nsimulates 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 \nis 20,334 square-miles.   Water levels, water-level altitude changes, and water-level and potentiometric-\nsurface altitude maps; streamflows; boundary flows; subsidence; groundwater pumpage; water use; \nand water-delivery observations were used to constrain parameter estimates throughout the calibration \nof the CVHM.  Measured compaction from extensometers placed in the valley was used as a subsidence \ncalibration target. The extensometer locations were obtained from USGS files and GPS locations. \nSubsidence monitoring observations can provide valuable information about hydrologic parameters \nsuch as elastic and inelastic skeletal specific storage. The CVHM was adjusted to fit the range of \nmeasured compaction at the extensometer sites utilizing UCODE-2005 (Poeter and others, 2006) \nand manual calibration. The calibration target was the measured compaction from several extensometers \nin the region. Compaction though delayed drainage and re-pressurizing of aquitards was not simulated. \nThe CVHM is the most recent regional-scale model of the Central Valley developed by the U.S. \nGeological Survey (USGS).  The CVHM was developed as part of the USGS Groundwater Resources \nProgram (see \"Foreword\", Chapter A, page iii, for details).", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P9GZ7YNV", "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.8ad9e431-730e-4355-a230-dd8f83a97e94.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_8ad9e431-730e-4355-a230-dd8f83a97e94", "keyword": ["inlandWaters", "Calaveras County", "Flow Model CVHM", "Yuba County", "Texture Model", "Ventura County", "Humboldt County", "Central Valley", "San Joaquin Valley", "Tuolumne County", "Butte County", "Stanislaus County", "San Joaquin County", "Fresno County", "Contra Costa County", "Central Valley, California", "Napa County", "Tulare County", "Nevada County", "Madera County", "Santa Clara County", "Shasta County", "hydrogeology", "Tehama County", "San Luis Obispo County", "model", "California", "geoscientificinformation", "groundwater", "Kern County", "Sacramento County", "Mendocino County", "subsidence", "Yolo County", "Solano County", "CV-RASA", "Mariposa County", "Placer County", "Glenn County", "Sacramento Valley", "Lake County", "hydrology", "Central Valley Aquifer", "Monterey County", "Central Valley Hydrologic Model", "El Dorado County", "Alameda County", "Trinity County", "Kings County", "extensometer", "Santa Barbara County", "Merced County", "Sutter County", "Colusa County", "Amador County", "Sonoma County", "USGS:8ad9e431-730e-4355-a230-dd8f83a97e94", "Groundwater Availability of the Central Valley Aquifer", "San Benito County"], "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": "Measured compaction for 24 extensometers in the Central Valley"}