Lynette E. Brooks Melissa D. Masbruch Susan G. Buto 2011 vector digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir2010_5193_GWdisch1000 Heilweil, V.M., editor Brooks, L.E., editor 2011 document U.S. Geological Survey Scientific Investigations Report SIR2010-5193 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/sir/2010/5193 This dataset was created in support of a study focusing on groundwater resources in the Great Basin carbonate and alluvial aquifer system (GBCAAS). The GBCAAS is a complex aquifer system comprised of both unconsolidated and bedrock formations covering an area of approximately 110,000 square miles. The aquifer system is situated in the eastern portion of the Great Basin Province of the western United States. The eastern Great Basin is experiencing rapid population growth and has some of the highest per capita water use in the Nation. These factors, combined with the arid setting, have levied intensive demand upon current groundwater resources and, thus, predictions of future shortages. Because of the large regional extent of the aquifer system, rapid growth in the region, and the reliance upon groundwater for urban populations, agriculture, and native habitats, the GBCAAS was selected by the U.S. Geological Survey (USGS) Water Resources program as part of the National Water Census Initiative to evaluate the Nation's groundwater availability. These data represent areas within the GBCAAS study area where groundwater discharge may occur as a result of evapotranspiration. The data were compiled from previously published groundwater discharge areas in the Great Basin. This dataset was created to support hydrologic investigations in the Great Basin Physiographic Province. The intended uses of this dataset include, but are not limited to, natural resource modeling, mapping, and visualization applications. 1964 2006 ground condition Complete None planned -118.355640 -111.526079 42.348557 35.461125 ISO 19115 topic category inlandWaters none Evapotranspiration Groundwater discharge Hydrographic area none Great Basin Utah Nevada Idaho California None. This data set is provided by USGS as a public service. Although this Federal Geographic Data Committee (FGDC) compliant metadata file is intended to document the dataset in nonproprietary form, this metadata file may include some ArcGIS-specific terminology. These data are not intended to be used as a survey product and are for reference only. These data were compiled from datasets of widely varying scale and should not be used at scales larger than 1:1,000,000. U.S. Geological Survey Utah Water Science Center Center Director mailing and physical address

2329 Orton Circle

Salt Lake City UT 84119 USA (801)908-5000 (801)908-5001 sbuto@usgs.gov http://water.usgs.gov/GIS/browse/sir2010_5193_gwdisch1000.jpg Illlustration of data set jpg Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. Technical review of this database was done by Shana L. Mashburn, USGS Oklahoma Water Science Center and Toby L. Welborn, USGS Nevada Water Science Center. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.4.1420 Buto, S.G. Sweetkind, D.S. 2011 vector digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir2010_5193_ha1000 Heilweil, V.M., editor Brooks, L.E., editor 2011 document U.S. Geological Survey Scientific Investigations Report SIR2010-5193 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/sir/2010/5193 Masbruch, M.M. Buto, S.G. 2011 vector digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir2010_5193_potentiometric1000 Heilweil, V.M., editor Brooks, L.E., editor 2011 document U.S. Geological Survey Scientific Investigations Report SIR2010-5193 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/sir/2010/5193 Sweetkind, D.S. Cederberg, J.R. Buto, S.G. Masbruch, M.M. 2011 raster digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir2010_5193_3D_HGF Heilweil, V.M., editor Brooks, L.E., editor 2011 document U.S. Geological Survey Scientific Investigations Report SIR2010-5193 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/sir/2010/5193 Alan L. Flint Lorraine E. Flint 2011 raster digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir2010_5193_BCM Heilweil, V.M., editor Brooks, L.E., editor 2011 document U.S. Geological Survey Scientific Investigations Report SIR2010-5193 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/sir/2010/5193 All attempts were made to verify 100 percent of the digital attribute data with the source. Verification was done by interactive on-screen review. Frequency tests were performed on all feature class attributes to check that no features were unlabeled, misspelled, or inconsistent. Corrections were made until two visual and manual comparisons, combined with on-screen review, determined 100 percent of the digital attribute data matched the source maps The logical consistency topologically is clean. Polygon topology is present. Using ArcGIS tools and routines, all polygons were checked for closure, sliver polygons, and duplicate features. Complete for the eastern Great Basin. National map accuracy standards (NMAS) established for the United States in 1947 (U.S. Geological Survey, 1988) state that no more than 10 percent of features shall be more than 1/50th of an inch from their intended location on maps of scale smaller than 1:20,000. National standards for spatial data accuracy (NSSDA) published by the Federal Geographic Data Committee (FGDC) in 1998 relate the NMAS to the digital geospatial data standard by multiplying the NMAS accuracy by a factor of 1.1406 (Federal Geographic Data Committee, 1998) resulting in expected error in the geospatial data at standard mapping scales as follows: 1: 24,000-scale map - 14 meters 1: 62,500-scale map - 36 meters 1: 100,000-scale map - 58 meters 1: 250,000-scale map - 145 meters 1: 500,000-scale map - 290 meters 1:1,000,000-scale map - 579 meters These data were compiled from source data of widely varying scale. The positional accuracy of the data is assumed to be no better than the positional accuracy of the smallest scale data included in the compilation. References Cited U.S. Geological Survey, 1988, National Mapping Program technical instructions --- Part 2: Specifications, Standards for Digital Line Graphs: U.S. Geological Survey, 56 p. Federal Geographic Data Committee, Subcommittee for Base Cartographic data, 1998, Geospatial Positioning Accuracy Standards ---Part 3: National Standard for Spatial Data Accuracy, FGDC-STD-007.3-1998, last accessed 03/29/2007 at URL http://www.fgdc.gov/standards/projects/FGDC-standards-projects/accuracy/part3/chapter3 600 meters Errors resulting from source map quality, automation processes, and scale resolution can impact the accuracy of data. Errors resulting from the quality of the source map and automation processes are unknown. Taking all known and unknown sources of error into account, the horizontal positional accuracy is deductively estimated as 600 meters. Medina, R.L. 2005 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ha694c_et1000gb_p Harrill, J.R. Gates, J.S. Thomas, J.M. 1988 map U.S. Geological Survey Hydrologic Investigations Atlas HA-694-C Reston, VA U.S. Geological Survey 2 sheets, scale 1:1,000,000 http://pubs.er.usgs.gov/usgspubs/ha/ha694C 1000000 vector digital data 1988 publication date gb gw-discharge Spatial and attribute information Smith, J.L. Reece, B.D. Medina, R.L. 2000 vector digital data U.S. Geological Survey Open File Report 99-242 Reston, VA U.S. Geological Survey Nichols, W.D. 2000 document U.S. Geological Survey Professional Paper 1628 Reston, VA U.S. Geological Survey 24000 vector digital data 2000 ground condition nichols gw-discharge Spatial information Laczniak, R.J. Smith, J.L. 2001 1.0 vector digital data Carson City, NV U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?darea Laczniak, R.J. Smith, J.L. Elliott, P.E. DeMeo, G.A. Chatigny, M.A. Roemer, G.J. 2001 document U.S. Geological Survey Water-Resources Investigations Report 2001-4195 Reston, VA U.S. Geological Survey http://pubs.er.usgs.gov/usgspubs/wri/wri014195 24000 vector digital data 2001 ground condition dvrfs gw-discharge Spatial information Laczniak, R.J. Moreo, M.T. Smith, J.L. Harper, D.P. Welborn, T.L. 2007 vector digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir2007-5087_potgwdischarge Smith, J.L. Laczniak, R.J. Moreo, M.T. Welborn, T.L. 2007 document U.S. Geological Survey Scientific Investigations Report 2007-5087 Reston, VA U.S. Geological Survey http://pubs.water.usgs.gov/sir20075087 1000000 vector digital data 2007 ground condition barcass gw-discharge Spatial information Buto, S.G. Sweetkind, D.S. 2011 vector digital data Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir2010_5193_ha1000 Heilweil, V.M., editor Brooks, L.E., editor 2011 document U.S. Geological Survey Scientific Investigations Report SIR2010-5193 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/sir/2010/5193 1000000 vector digital data 2010 publication date gbcaas ha spatial and attribute information Rush, F.E. 1964 document State of Nevada Department of Conservation and Natural Resources Ground-water Resources Reconnaissance Report 27 Carson City, NV State of Nevada Department of Conservation and Natural Resources map 1964 ground condition rr 27 spatial information Rush, F.E. 1968 document State of Nevada Department of Conservation and Natural Resources Water Resources Reconnaissance Report 50 Carson City, NV State of Nevada Department of Conservation and Natural Resources map 1968 publication date rr 50 spatial information Thiros, S.A. Stolp, B.J. Hadley, H.K. Steiger, J.I. 1996 document State of Utah Department of Natural Resources Technical Publication 114 Salt Lake City, UT State of Utah Department of Natural Resources map 1996 publication date tp 114 spatial information Bolke, E.L. Price, D. 1972 document State of Utah Department of Natural Resources Technical Publication 37 Salt Lake City, UT State of Utah Department of Natural Resources map 1972 publication date tp 37 spatial information Digital vector data sources were merged into a single groundwater-discharge area dataset by inspecting each hydrographic area and selecting the groundwater discharge areas to be included. Where multiple groundwater-discharge areas had been mapped by different sources, the most recently published groundwater-discharge area was generally selected for the final dataset. The attribute "source" documents the selection process. Groundwater-discharge areas in four hydrographic areas were estimated based on information from published reports as follows (see the source information section of this document for source citation abbreviations): 1. The mapped area from gb gw-discharge in Juab Valley was badly located. The area from gb gw-discharge was deleted and a new area estimated from maps presented in tp 114 was added to the dataset. 2. The mapped area from gb gw-discharge in Lower Moapa Valley was smaller than the area presented in rr 50. The area was extended based on the area in rr50. 3. No areas were mapped in Spring (HA 201) and Clover valleys. These areas were estimated from rr 27. 4. No area was mapped in Blue Creek Valley. The area was estimated from tp 37. The compiled groundwater discharge area dataset was intersected with the GBCAAS study area hydrographic areas to facilitate water budget computations and ground-water model support. gb gw-discharge barcass gw-discharge dvrfs gw-discharge nichols gw-discharge rr 27 rr 50 tp 114 tp 37 gbcaas ha 112007-072008 sir20105193_gwdisch1000_p Vector G-polygon 265 String 793 Albers Conical Equal Area 29.500000 45.500000 -114.000000 23.000000 0.000000 0.000000 coordinate pair 0.000167 0.000167 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 sir20105193_gwdisch1000_p Polygon feature class ESRI OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. SHAPE Feature geometry. ESRI Coordinates defining the features. hyd_area Hydrographic Area Number GBHA U.S. Geological Survey Hydrologic Investigations Atlas HA694-C U.S. Geological Survey hyd_area_name Hydrographic Area Name GBHA U.S. Geological Survey Hydrologic Investigations Atlas HA694-C U.S. Geological Survey subarea_name Hydrographic Subarea Name GBHA U.S. Geological Survey Hydrologic Investigations Atlas HA694-C U.S. Geological Survey source The source of the polygon User defined HA694-C gb gw-discharge - see source information for details User defined OFR99-242/PP 1628 nichols gw-discharge - see source information for details User defined RR 27 rr 27 - see source information for details User defined RR 50 rr 50 - see source information for details User defined SIR2007-5087 BARCASS barcass gw-discharge - see source information for details User defined TP 114 tp 114 - see source information for details User defined TP 37 tp 37 - see source information for details User defined WRIR 01-4195 DVRFS dvrfs gw-discharge - see source information for details User defined et_type Assumed source of discharge User defined 1 Groundwater. Discharge is assumed to be in the form of evapotranspiration from groundwater. User defined 2 Surface water. Discharge is assumed to be in the form of groundwater discharge to streams. These areas were accounted for as groundwater discharge to streams and not included as areas of evapotranspiration in groundwater-budget calculations. User defined 3 Spring. Discharge is assumed to be in the form of groundwater discharge to springs. These areas were accounted for as spring discharge and not included as areas of evapotranspiration in groundwater-budget calculations. User defined area_acres the area of the polygon in acres User defined 1 1146201 Acres SHAPE_Length Length of feature in internal units. ESRI Positive real numbers that are automatically generated. SHAPE_Area Area of feature in internal units squared. ESRI Positive real numbers that are automatically generated. U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. WinZipped personal geodatabase 9.2 ESRI 9.2 personal geodatabase Spatial and attribute information http://water.usgs.gov/GIS/dsdl/SIR2010_5193_GWdischarge1000.pgdb.zip WinZipped shapefile 07252011 ESRI shapefile. Note some information such as field names and relationship classes may be altered or removed from the source data during conversion to ESRI shapefile format Spatial and attribute information http://water.usgs.gov/GIS/dsdl/SIR2010_5193_GWdischarge1000.shape.zip None. This data set is provided by USGS as a public service. 20081104 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+SIR2010_5193_GWdischarge1000 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998