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 bnd_pp1409a Reston, Virginia U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir045205_bnd_pp1409a 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. http://pubs.usgs.gov/sir/2004/5205/ This digital data set is a historical definition of the extent (approximately 42,600 square-kilometers) and lateral boundary of the Death Valley regional ground-water flow system (modified from Harrill and others, 1988; and Harrill and Prudic, 1998). Harrill and others (1988) developed boundaries for the major ground-water flow systems in the Great Basin region of Nevada, Utah, and adjacent states using the boundaries of hydrographic areas. Harrill and Prudic (1998) refined the delineation of the Death Valley ground-water flow system by using a more accurate base map. The studies by Harrill and others (1988) and Harrill and Prudic (1998) served as historical references used to support development of the transient ground-water model of Death Valley regional ground-water flow system (DVRFS) completed in 2004 by the USGS (see "Larger Work Citation", Chapter A, pages 9-10, for details). This digital data set represents the historical delineation of the Death Valley regional ground-water flow system modified from Harrill and others (1988) and Harrill and Prudic (1998) that was based primarily on hydrographic areas. This data set is used to illustrate and compare historical definitions of the Death Valley regional ground-water flow system published by the USGS (see "Larger Work Citation", figure A-2, p. 10). The Death Valley regional aquifer system boundary 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. 1998 publication date Complete None planned -117.714973 -115.070737 38.134115 35.312480 American Geological Institute Glossary of Geology Death Valley regional ground-water flow system (DVRFS) ground water ground-water flow system boundary hydrology hydrogeolgy transient ground-water flow model 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 http://water.usgs.gov/GIS/browse/sir045205_bnd_pp1409a.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 digitized from hard copy in Harrill and others (1988). The area defined by the polygon is the Death Valley flow system delineated by Harill and Prudic (1998). 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 source maps. Harrill, J.R. Gates, J.S. Thomas, J.M. 1988 map Hydrologic Investigation Atlas HA-694-C Reston, VA U.S. Geological Survey 2 plates http://pubs.er.usgs.gov/ha/ha694c 1000000 paper 1988 publication date Harrill and others (1988) Base map from which polygon feature was traced. Harrill, J.R. Prudic, D.E. 1998 Professional Paper 1409-A Washington U.S. Geological Survey Figure 2 ; Table 1. http://pubs.er.usgs.gov/pubs/pp/pp1409A paper 1998 publication date Harrill and Prudic (1998) Figure 2 and Table 1 define the Death Valley flow system subregion. The polygon feature in this data set, defined by Harrill and Prudic (1998), was identified on the paper-based copy of sheet 2 in Harrill and others (1988) and manually traced onto a stable base mylar. A drumbed scanner was then used to capture the digital data at a resolution of approximately 0.01 inches. A minimum of four control points corresponding to the latitude and longitude even degree locations on the plate were used to register the data to Universal Transverse Mercator (UTM) during digitization. The digital data set was checked by comparing plots to the source material and the coverage was attributed. Harrill and others (1988) Harrill and Prudic (1998) 2002 Vector G-polygon 1 Transverse Mercator 0.999600 -117.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000512 0.000512 meters D_Clarke_1866 Clarke 1866 6378206.400000 294.978698 Ground-water flow system boundary The boundary represents the approximate lateral extent of a ground-water flow system. Author (Metadata Author) 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 point features. Area_m2 Area of the study area in square meters. Author (Metadata Contact Person) Area of the study area in square meters. Each polygon feature has 3 attributes. Two attributes are automatically generated by the GIS system (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 Ask USGS - Water Webserver Team mailing and physical address

445 National Center

Reston VA 20192 USA 1-888-275-8747 http://water.usgs.gov/user_feedback_form.html 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 37 Kilobytes http://rmgsc.cr.usgs.gov/metadata/dvrfs/archive/bnd_pp1409a.zip None 20070802 U.S. Geological Survey mailing address

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+sir045205_bnd_pp1409a FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998