{"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 in the \nCentral 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 USGS numerical modeling code MODFLOW-FMP (Schmid and others, 2006).  This simulation \nis referred to here as the CVHM (Faunt, 2009). Utilizing MODFLOW-FMP, the CVHM simulates \ngroundwater and surface-water flow, irrigated agriculture, land subsidence, and other key processes in \nthe Central Valley on a monthly basis from 1961-2003.  The total active modeled area is 20,334 square-miles.   \nWater levels, water-level altitude changes, and water-level and potentiometric-surface altitude maps; \nstreamflows; boundary flows; subsidence; groundwater pumpage; water use; and water-delivery observations \nwere used to constrain parameter estimates throughout the calibration of the CVHM.  Measured compaction \nfrom extensometers placed in the valley was used as a subsidence calibration target. The extensometer \nlocations were obtained from USGS files and GPS locations. Subsidence monitoring observations can provide \nvaluable information about hydrologic parameters such as elastic and inelastic skeletal specific storage. The \nCVHM was adjusted to fit the range of measured compaction at the extensometer sites utilizing UCODE-2005 \n(Poeter and others, 2006) and manual calibration. The calibration target was the measured compaction from \nseveral extensometers in the region. Compaction though delayed drainage and re-pressurizing of aquitards \nwas not simulated. The CVHM is the most recent regional-scale model of the Central Valley developed by the \nU.S. Geological 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/P93V7RAP", "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.f3ffc715-ba59-437a-87d1-9fee74d0812e.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_f3ffc715-ba59-437a-87d1-9fee74d0812e", "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:f3ffc715-ba59-437a-87d1-9fee74d0812e", "Ventura County", "Yolo County", "Yuba County", "extensometer", "geostatistics", "groundwater", "hydrogeology", "hydrology", "inlandWaters", "model", "subsidence", "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": "Measured compaction for 24 extensometers in the Central Valley"}