Faunt, Claudia C. 2006 Edition 2 which is an update from sir045205_chds vector digital data Digital geospatial data sets for the hydrogeologic framework and transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California chds Reston, Virginia U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?pp1711_chds Belcher, W.R. and Sweetkind, D.S. (editors) 2010 U.S. Geological Survey Professional Paper 1711 Reston, Virginia U.S. Geological Survey 6 chapters, 2 appendices, 2 plates, 403 p. http://pubs.er.usgs.gov/publication/pp1711 Belcher, W.R. (editor) 2004 U.S. Geological Survey Scientific Investigations Report 2004-5205 Reston, Virginia U.S. Geological Survey 6 chapters, 2 appendices, 2 plates, 408 p. https://pubs.usgs.gov/sir/2004/5205/ This digital data set represents the constant head-boundary used to simulate ground-water inflow or outflow at the lateral boundary of the Death Valley regional ground-water flow system (DVRFS) transient model. The area simulated by the DVRFS transient ground-water flow model is an approximately 45,000 square-kilometer region of southern Nevada and California. The hydraulic heads imposed at the constant-head cells were interpolated from a regional potentiometric surface ("Larger Work Citation", Appendix 1). Quantity of ground- water flow at the constant-head boundary was estimated using water-budget and Darcy calculations ("Larger Work Citation", Appendix 2), and was used as observation information during calibration of the DVRFS model (Faunt and others, 2004). The DVRFS transient ground-water flow model is one of the most recent in a number of regional-scale models developed by the U.S. Geological Survey (USGS) for the U.S. Department of Energy (DOE) to support investigations at the Nevada Test Site (NTS) and at Yucca Mountain, Nevada (see "Larger Work Citation", Chapter A, page 8). The constant-head boundary data set was used to develop input to MODFLOW-2000, the USGS 3D finite- difference code used to simulate ground-water flow in the DVRFS. The estimate of flow at the constant-head boundary was used as a component of the water budget and also to develop constant-head observations for calibrating the DVRFS transient ground-water flow model. The simulated constant-head boundary data set is one of many layers in a geospatial database supporting the USGS DVRFS project. During this 5-year (1998-2004) project the USGS, in cooperation with DOE and other Federal, State, and local agencies, developed this geospatial database for a regional-scale, 3D hydrogeologic framework model (HFM) and a ground-water flow model. The models are intended to address water-resource issues and the potential movement of radioactive material from the Nevada Test Site and the proposed high-level nuclear waste repository at Yucca Mountain, Nevada. Data from two previous ground-water flow models of the greater Death Valley region (see "Larger Work Citation", Chapter A, p. 7) were the foundation of the DVRFS geospatial database. Those and other data were reexamined through a series of regional-scale hydrologic investigations to provide updated and spatially consistent interpretations or the DVRFS study. In some cases, new data were collected to augment the existing information. Data compiled from the studies include natural ground-water discharge occurring through evapotranspiration and spring flow; ground-water pumping for the period 1913-98; ground-water recharge simulated as net infiltration; ground-water inflow and outflow at lateral model boundaries; hydraulic conductivity and its relation to depth and other rock properties; and the estimation of water levels representative of prepumped and pumped conditions in the region. Digital elevation models, geologic maps, borehole information, cross sections, and other 3D models were used to develop the HFM which represents the geometry of 27 hydrogeologic units and structural features. The resulting geospatial database supports characterization and conceptualization of the DVRFS, construction of 3D hydrogeologic framework and ground-water flow models, and visualization of analysis and model results. 2004 publication date Complete None planned -117.718697 -114.981308 38.120690 35.481569 USGS Thesaurus Death Valley regional ground-water flow system constant-head boundary flow model ground water ground-water inflow ground-water outflow hydraulic head hydraulic-head observation hydrogeology hydrology lateral ground-water flow lateral ground-water model boundary MODFLOW-2000 transient ground-water model water level inlandWaters ISO 19115 Topic Category geoscientificInformation inlandWaters environment USGS Metadata Identifier USGS:08801d82-3b63-415d-a00a-3fe3b0537e72 Geographic Names Information System (GNIS) Amargosa Desert Ash Meadows California California Valley Chicago Valley China Ranch Clark County Clayton Valley Coal Valley Death Valley Esmeralda County Eureka Valley Franklin Lake Franklin Well Garden Valley Inyo County Kern County Las Vegas Valley Lincoln County Mesquite Valley Mineral County Mono County Nevada Nevada Test Site Nye County Oasis Valley Owlshead Mountains Pahranagat Range Pahrump Valley Panamint Range Penoyer Valley Railroad Valley Resting Spring Saline Valley San Bernadino County Sarcobatus Flat Sheep Range Shoshone Silurian Valley southern Nevada Spring Mountains Stewart Valley Stone Cabin Valley Tecopa Yucca Mountain None Data have been checked to ensure the accuracy of the data. If any errors are detected, please notify the originating office. The U.S. Geological Survey strongly recommends that careful attention be paid to the metadata file associated with these data. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and (or) contained herein. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcGIS format, this metadata file may include some ArcGIS-specific terminology. U.S. Geological Survey Claudia Faunt mailing and physical address

California Water Science Center

San Diego Projects Office

4165 Spruance Road, Suite 200

San Diego California 92101 USA (619) 225-6142 (619) 225-6101 ccfaunt@usgs.gov https://water.usgs.gov/GIS/browse/sir045205_chds.jpg Illlustration of data set jpg Spatial data sets supporting the Death Valley regional ground-water flow system (DVRFS) project were developed in cooperation with the U.S. Department of Energy (DOE) National Nuclear Security Administration/Nevada Site Office (NNSA/NSO) Underground Test Area (UGTA) project of the Office of Environmental Management, the NNSA/NSO Hydrologic Resource Management Program (HRMP), the Office of Civilian Radioactive Waste Management (OCRWM) Yucca Mountain Project (YMP), the NNSA/NSO Maintenance of Test Capability (MTC) program, and the National Park Service (NPS). Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 Attributes added by the GIS and the data-set author were checked by inspection using a GIS. In addition, attributes were checked and evaluated as part of the review process associated with the publication of the source report. Lines forming polygons join at endpoints to completely enclose defined areas. No duplicate polygon features or pseudo nodes exist. Nodes are represented by a single coordinate pair that indicates the starting/ending point of the line forming the polygon. All vertices that define the shapes of the polygons are represented by unique coordinate pairs. The polygon features in this data set are computer-generated and represent the model grid of the DVRFS numerical flow model. The data set is complete and is not anticipated to change. Horizontal positional accuracy of line features in the data set was confirmed by visually comparing hard-copy plots to the original source maps. Faunt, C.C. Blainey, J.B. Hill, M.C. D'Agnese, F.A. O'Brien, G.M. 2004 document Chapter F Belcher, W.R. (ed.) 2004 document U.S. Geological Survey Scientific Investigations Report 2004-5205 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/pubs/sir/2004/5205/ 250,000 online 2004 publication date Faunt and others (2004) Map source Bedinger, M.S. Harrill, J.R. 2004 document Appendix 1 Belcher, W.R. (ed.) 2004 document U.S. Geological Survey Scientific Investigations Report 2004-5205 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/pubs/sir/2004/5205/ 650,000 online 2004 publication date Bedinger and Harrill (2004) Source data for constant-head water levels Harrill, J.R. Bedinger, M.S. 2004 document Appendix 2 Belcher, W.R. (ed.) 2004 document U.S. Geological Survey Scientific Investigations Report 2004-5205 Reston, Virginia U.S. Geological Survey http://water.usgs.gov/pubs/sir/2004/5205/ online 2004 publication date Harrill and Bedinger (2004) Source data for flow estimates at constant-head boundary A GIS was used to develop a polygon layer representing the flow-model grid, and constant-head cells were specified along the lateral-flow boundary where inflow and outflow were thought to occur. This included the spatial extent of inflow and outflow areas defined by Harrill and Bedinger (2004) and the model layers that included alluvium, volcanic, or carbonate rock units below the regional potentiometric surface (Bedinger and Harrill, 2004). The constant-head cells (polygons) were attributed with hydraulic-head values interpolated from the regional potentiometric surface (Bedinger and Harrill, 2004). The constant-head cells were also attributed with estimates of lateral flux made for each of the 12 boundary segments using water budget and Darcy calculations (Harrill and Bedinger, 2004). Faunt and others (2004, table F-2) used the segment number and name and the lateral-flux estimates to develop observations for model input and calibration. Faunt and others (2004) Bedinger and Harrill (2004) Harrill and Bedinger (2004) 2004 Vector G-polygon 31040 Universal Transverse Mercator 11 0.999600 -117.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000512 0.000512 meters North American Datum of 1927 Clarke 1866 6378206.400000 294.978698 Constant head model cells Grid cell in a ground-water model where flow in and out of the cell is simulated to maintain a fixed water level Metadata author FID Internal feature number. Environmental Systems Research Institute, Inc. (ESRI) Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. COLUMN Model-grid column number Metadata author 1 160 Integer ROW Model-grid row number Metadata author 1 194 Integer LAY1 Constant-head cell in flow-model layer 1 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY2 Constant-head cell in flow-model layer 2 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY3 Constant-head cell in flow-model layer 3 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY4 Constant-head cell in flow-model layer 4 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY5 Constant-head cell in flow-model layer 5 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY6 Constant-head cell in flow-model layer 6 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY7 Constant-head cell in flow-model layer 7 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY8 Constant-head cell in flow-model layer 8 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY9 Constant-head cell in flow-model layer 9 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY10 Constant-head cell in flow-model layer 10 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY11 Constant-head cell in flow-model layer 11 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY12 Constant-head cell in flow-model layer 12 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY13 Constant-head cell in flow-model layer 13 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY14 Constant-head cell in flow-model layer 14 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY15 Constant-head cell in flow-model layer 15 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author LAY16 Constant-head cell in flow-model layer 16 Metadata author 0 Non-active constant-head cell Metadata author 1 Active constant-head cell Metadata author OBSNAM Unique identifier for each constant-head observation Faunt and others (2004), Table F-2 Identifier of constant-head observation for MODFLOW model input Q_M3DAY Estimated ground-water flow across constant-head boundary Larger Work Citation, Appendix 2, Table A2-9 -15,305 15,100 cubic meters per day STAT Constant-head observation error statistic Larger Work Citation, Appendix 2, Table A2-9 0 15,000 cubic meters per day ACTIVE Numerical model area (cell) where calculations are made Metadata author 0 Non-active cell Metadata author 1 Acitve cell Metadata author HEAD_M Hydraulic-head value Author (Point of Contact) 0 1650.47 meters Each polygon feature has 25 attributes. Two attributes are automatically generated by the GIS (FID, Shape) for internal software purposes. The remaining attributes were assigned by the author (Citation Originator) for analysis and for developing input files for the DVRFS numerical ground-water flow model. - U.S. Geological Survey Michael Ierardi mailing and physical address

445 National Center

Reston VA 20192 USA 1-888-275-8747 mierardi@usgs.gov Contact via email or phone. Digital geospatial data sets for the transient ground-water flow model and hydrogeologic framework model, Death Valley regional ground-water flow system, Nevada and California Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. These data should be directly acquired from a U.S. Geological Survey server, and not indirectly through other sources that may have altered the data in some way. Shapefile 1.0 Unzip 957 https://water.usgs.gov/GIS/dsdl/chds.zip None 20201117 U.S. Geological Survey mailing address

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998