{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Nevada Water Science Center", "hasEmail": "mailto:GS-W-NVcrs_Webmaster@usgs.gov"}, "description": "This data release documents a modified version of the Death Valley version 3 steady-state (DV3-SS) \nmodel described in U.S. Geological Survey Professional Paper 1863 (https://doi.org/10.3133/pp1863). \nThe DV3-SS model was modified by conversion into a superposition model with initial heads of 0 ft (0 m). \nSimulated water-level changes are relative to modern, predevelopment (pre-1950) conditions, where \nmodern levels have a reference datum of 0 ft (0 m). The modified DV3-SS model is a three-dimensional, \ngroundwater model (MODFLOW-2005) that was used to estimate paleo-recharge in the Ash Meadows \ngroundwater basin, southwest Nevada, using the Devils Hole (cave 2) water-table record that spans the \nlast 350,000 years. Two steady-state (paleo-recharge) scenarios were developed. Scenario 1 simulates \npaleo-recharge during peak glaciation when the Devils Hole water-table elevation was +31.2 ft (+9.5 m) \nabove the modern level. Scenario 2 simulates the peak interglacial when the Devils Hole water-table \nelevation was below the modern level but above -5.25 ft (-1.6 m). Two transient (future recharge) scenarios \nwere developed by running the modified DV3-SS model as a transient model. Transient scenarios 1 and 2 \nsimulate 10 and 20 percent decreases in modern recharge, respectively. Transient scenarios are used to \nestimate future water-level declines in Devils Hole and the time period for equilibration to changes in future \nrecharge. Input and output files for the paleo-recharge and future scenarios are in the model and output \ndirectories, respectively. The modified DV3-SS model and transient model used the calibrated hydraulic \nproperties and recharge distribution from the original DV3-SS model (https://doi.org/10.3133/pp1863). The \nancillary directory includes (1) 151 MODFLOW-2005 recharge files used to simulate 151 paleo-recharge \nscenarios (Appendix A); (2) batch files, executables, and post-processing utilities to sequentially run the \n151 paleo-recharge scenarios and process results (Appendix B); and (3) a transient version of the modified \nDV3-SS model to determine the timescale for equilibration to steady-state conditions assuming modern \nrecharge is reduced by 10 or 20 percent (Appendix C).", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P98YZC5P", "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.670229ac-8134-4c3c-8db3-9c72f4fdb01f.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_670229ac-8134-4c3c-8db3-9c72f4fdb01f", "keyword": ["Amargosa Desert", "Amargosa River", "Ash Meadows", "California", "Clark County", "Death Valley", "Devils Hole", "Frenchman Flat", "Furnace Creek", "Furnace Creek Ranch", "Groundwater", "Groundwater Model", "Inyo County", "Lincoln County", "MODFLOW", "MODFLOW-2005", "Nevada", "Nye County", "Paleo recharge", "USGS:670229ac-8134-4c3c-8db3-9c72f4fdb01f", "Yucca Flat", "environment", "geoscientificInformation", "inlandWaters", "usgsgroundwatermodel"], "modified": "2022-02-17T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-117.0662759, 35.64430616, -115.0770292, 37.72674773", "theme": ["geospatial"], "title": "MODFLOW-2005 model used to estimate paleo-recharge volumes and project future water-level changes in Ash Meadows groundwater basin, southwest Nevada, based on Devils Hole paleo-water-table record"}