Faunt, Claudia C. 2006 map Digital data sets for the transient ground-water flow model, Death Valley regional ground-water flow system, Nevada and California ugta_flow_bnd Reston, Virginia U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?sir045205_ugta_flow_bnd 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 defines the boundary of the steady-state ground-water flow model built by IT Corporation (1996). The regional, 20-layer ground-water flow model was developed for the Underground Test Area (UGTA) Phase I project to simulate the Nevada Test Site and surrounding areas. The model was used for estimating the amount of water moving through the ground-water system, predicting the movement of contaminants, evaluating uncertainty in these predictions, and supplying boundary conditions for more detailed models of the underground testing areas. The U.S. Geological Survey integrated the IT Corporation (1996) model with the ground-water flow model by D'Agnese and others (1997) to develop a transient flow model of the Death Valley regional ground-water flow system (DVRFS) for the Department of Energy in 2004 (see "Larger Work Citation", Chapter A, pages 7-9, for details). Reference: D'Agnese, F.A., Faunt, C.C., Turner, A.K., and Hill, M.C., 1997, Hydrogeologic evaluation and numerical simulation of the Death Valley regional ground-water flow system, Nevada and California: U.S. Geological Survey Water-Resources Investigations Report 96-4300, 124 p. http://pubs.er.usgs.gov/pubs/wri/wri964300 The boundary of the ground-water flow model by IT Corporation (1996) was used to develop the subsequent lateral boundary of the transient ground-water flow model of the Death Valley regional ground-water flow system (see "Larger Work Citation", figure A-2, p. 10). The boundary of the ground-water flow model by IT Corporation (1996) is one of many spatial layers in a spatial database supporting the USGS DVRFS project. This 5-year (1998-2004) project, completed in cooperation with DOE and other Federal, State, and local agencies, developed this spatial 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 or 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. These and other data were reexamined through a series of regional-scale hydrologic investigations to provide updated and spatially consistent interpretations for 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. 1996 publication date Complete None planned -117.069493 -115.068993 38.123629 36.131154 USGS Thesaurus Death Valley regional ground-water flow system (DVRFS) evapotranspiration ground water ground-water discharge ground-water flow system boundary ground-water pumping ground-water recharge hydraulic conductivity hydraulic head hydrogeologic framework model hydrogeology hydrology lateral ground-water flow lateral ground-water model boundary net infiltration spring flow steady state ground-water flow model transient ground-water flow model water level water well USGS Metadata Identifier USGS:c71acf7f-8504-4f7e-9d16-ae36e4321c73 U.S. Board of Geographic Names (BGN) and Geographic Names Information System (GNIS) Amargosa Desert Ash Meadows California California Valley Chicago Valley China Ranch Clark County Clayton Valley Coal Valley Death Valley eastern California 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 Bernardino 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 and efforts have been made to ensure the accuracy of the data. If any errors are detected during future use of the data, please notify the originating office. The U.S. Geological Survey strongly recommends that careful attention be paid to the contents of 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

San Diego California 92101 USA (619) 225-6142 (619) 225-6101 ccfaunt@usgs.gov https://water.usgs.gov/GIS/browse/sir045205_ugta_flow_bnd.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's (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's (OCRWM) Office of Repository Development (ORD), 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 the polygon join at endpoints to completely enclose the area. Lines do not intersect, and no duplicate line features exist. All endpoints are represented by a single coordinate pair which indicates the beginning or end of a line. The polygon feature in this data set was developed by IT Corporation (1996) and acquired digitally by the U.S.Geological Survey. The data set is complete and is not anticipated to change. Horizontal positional accuracy of line features in the data set was tested by visually comparing hard copy plots to the original digital source data. IT Corporation 1996 map Groundwater flow model data documentation package Report ITLV/10972-181 Las Vegas, Nevada U.S. Department of Energy 8 volumes, various pagination. digital file 1996 publication date IT Corporation (1996) Developer of digital data set. Line features forming the lateral boundary of the ground-water flow model by IT Corporation (1996) were acquired by the USGS as Drawing Exchange Format (DXF) files (R. Waddell, IT Corporation, written communication, 1999). The DXF file containing the boundary geometry was converted to a shapefile using a GIS; the resulting polygon feature was attributed by the author (Point of Contact). IT Corporation (1996) 1999 Vector G-polygon 1 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 Ground-water flow model lateral boundary Boundary representing the aerial extent simulated by a digital computer model that calculates a hydraulic head field for the modeling domain using numerical methods to arrive at an approximate solution to the differential equation of ground-water flow. Modified from Nevada Division of Water Planning Dictionary, Technical water, water quality, environmental, and water-related terms. Accessed May 13, 2005 at <http://water.nv.gov/Water%20planning/dict-1/wwords-g.pdf> FID Internal point feature number Environmental Systems Research Institute, Inc.(ESRI) Sequential unique whole numbers that are automatically generated. Shape Feature geometry ESRI Coordinates defining the polygon feature. AREA_m2 Area of the flow model in square meters. Author (Metadata Contact Person) Unique value representing the area of the flow model area in square meters. Each polygon feature has 3 attributes. Two attributes are automatically generated by the GIS (FID, Shape) for internal software purposes. The remaining attribute was assigned by the author (Metadata Contact) for analysis and[or] descriptive purposes (Area_m2). - 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 data sets for USGS Scientific Investigations Report 2004-5205 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. It is strongly recommended that these data are directly acquired from a U.S. Geological Survey server, and not indirectly through other sources which may have altered the data in some way. Shapefile 1.0 unzip 43 https://water.usgs.gov/GIS/dsdl/ugta_flow_bnd.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