Randell J. Laczniak Michael T. Moreo J. LaRue Smith Donald P. Harper Toby L. Welborn 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 Scientific Investigations Report SIR 2007-5087 Reston, VA U.S. Geological Survey http://pubs.water.usgs.gov/sir20075087 These data represent potential areas of ground-water discharge for selected hydrographic areas in eastern Nevada and western Utah. The data are based on phreatophyte boundaries published by the U.S. Geological Survey (USGS) and on unpublished boundaries mapped by the Southern Nevada Water Authority (SNWA). Selected basins also were mapped by the USGS during an aerial field reconnaissance. The largest phreatophyte extent from all the sources was typically selected as the final boundary where a basin was covered by multiple boundaries. Selected basins were field verified and modified to reflect the ground condition during the summer of 2005. This data set also includes subbasin boundaries identified by Sweetkind and others (2007) (See Source_Information). The table below lists the boundary sources for each valley and whether the data were ground verified. > Valley Sources Field > verified ------------------------------------------------------------------------------------------ >Little Smoky Nichols, 2000; Harrill, 1988 Yes >Newark Nichols, 2000; Harrill, 1988 Yes >Long Nichols, 2000; Harrill, 1988; SNWA Yes >Jakes Nichols, 2000; SNWA Yes >Butte Nichols, 2000; Harrill, 1988; SNWA Yes >Steptoe Nichols, 2000; Harrill, 1988; SNWA No >Tippett Nichols, 2000 No >Spring Nichols, 2000; Harrill, 1988; SNWA Yes >Snake Harrill, 1988; SNWA; Aerial No >Lake Harrill, 1988; SNWA; Aerial Yes >Cave SNWA; Aerial No >White River Harrill, 1988; SNWA; Aerial Yes The intended use of this data set was to identify evapotranspiration (ET) unit areas for each hydrographic area and to identify the subbasin ET units for each hydrographic area. 1988 2006 publication date Complete None planned -116.120959 -113.403219 40.369525 38.139633 none Phreatophyte Evapotranspiration Ground-water discharge Subbasins none Nevada Utah Great Basin Butte Valley Cave Valley Jakes Valley Lake Valley Little Smoky Valley Long Valley Newark Valley Snake Valley Spring Valley Steptoe Valley Tippett Valley White River Valley inlandWaters None. Although this Federal Geographic Data Committee (FGDC) compliant metadata file is intended to document the data set in nonproprietary form, as well as ArcGIS format, 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 purposes only. Acknowledgement of the U.S. Geological Survey and the Bureau of Land Management would be appreciated in products derived from these data. U.S. Geological Survey Public Information Assistant mailing and physical address

2730 North Deer Run Road

Carson City NV 89701 USA (775) 887-7600 (775) 887-7629 GS-W_NVpublic-info@usgs.gov (Warning: Although accurate at the time of production, this information may have become obsolete. See the Metadata_Reference_Information section for a current contact.) Compilation of this data set and the associated metadata was done in cooperation with the Bureau of Land Management. Technical review of this data set and metadata was provided by Rose L. Medina and Amy Mathie of the U.S. Geological Survey. Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780 Moreo, M.T. Laczniak, R.J. Stannard, D.I. 2007 document Scientific Investigations Report 2007-5078 Reston, VA U.S. Geological Survey http://pubs.water.usgs.gov/sir20075078 Welborn, T.L. Moreo, M.T. 2007 document Data Series 273 Reston, VA U.S. Geological Survey http://pubs.water.usgs.gov/ds273 Welch, A.H. Bright, D.J. 2007 document Open-File Report 2007-1156 Reston, VA U.S. Geological Survey http://pubs.water.usgs.gov/ofr20071156 All attempts were made to verify 100 percent of the digital attribute data with the source(s) where applicable. 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. The logical consistency topologically is clean. Polygon and chain-node topology is present. Using ArcGIS topology tools and routines, all polygons were checked for closure, sliver polygons, and duplicate features; all lines were checked for node errors, overshoots, undershoots, dangles, intersections, and duplicate features. In the ArcGIS geodatabase, the topology rules have been removed. Complete. 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(s) and automation processes are unknown. These data are derived from multiple sources and mapping methods in some cases with unknown scales and methodologies. The data sources and error estimations are as follows: Harrill, 1988 - The data are derived from a 1:1,000,000-scale map. The horizontal accuracy estimation from the source data is 550 meters. Nichols, 2000 - The data were mapped using geocorrected Landsat imagery and 1:24,000-scale maps. The horizontal accuracy estimation from the source data is 30 meters. SNWA - Methods used to derive these data are unknown and no accuracy estimations are available. Helicopter mapping - no accuracy estimations are available from this method. Subbasin mapping - Unknown error Field reconnaissance and verification was done using handheld GPS units connected to a laptop computer using the Minnesota Department of Natural Resources DNR-Garmin (http://www.dnr.state.mn.us/mis/gis/tools/arcview/extensions.html) in conjunction with visual verification of the presence or absence of phreatophytic vegetation. No accuracy estimations are available from this method. 550 meters The horizontal positional accuracy was estimated based on information from all the data sources and mapping methods used to derive these data as described in the horizontal positional accuracy report and the process steps. Taking all known and unknown sources of error into consideration, the horizontal positional error is deductively estimated at 550 meters. Not applicable. Medina, R.L. 2005 vector digital data Reston, VA U.S. Geological Survey Used for: Little Smoky Valley, Newark Valley, Long Valley, Butte Valley, Steptoe Valley, Spring Valley, Snake Valley, Lake Valley, White River Valley 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 1000000 vector digital data 1988 publication date gb et spatial 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 Used for: Little Smoky Valley, Newark Valley, Long Valley, Jakes Valley, Butte Valley, Steptoe Valley, Tippett Valley, Spring Valley Nichols, W.D. 2000 document U.S. Geological Survey Professional Paper 1628 Reston, VA U.S. Geological Survey 24000 vector digital data 2000 publication date nichols spatial information Wallen, M. Unpublished Material vector digital data Las Vegas, NV Southern Nevada Water Authority Used for: Little Smoky Valley, Newark Valley, Long Valley, Jakes Valley, Butte Valley, Steptoe Valley, Spring Valley, Snake Valley, Lake Valley, Cave Valley, White River Valley vector digital data 2005 ground condition snwa spatial information U.S. Geological Survey Unpublished Material vector digital data Henderson, NV U.S. Geological Survey Valleys mapped by aerial survey: Snake Valley, Lake Valley, Cave Valley, White River Valley vector digital data 2005 ground condition aerial spatial information Sweetkind, D. Unpublished Material vector digital data Denver, CO U.S. Geological Survey Sweetkind, D.S. Knochenmus, L.A. Ponce, D.A. Wallace, A. Schreirer, D. Watt, J.T. Plume, R.W. 2007 document Open-File Report 2007-1156 Reston, VA U.S. Geological Survey http://pubs.water.usgs.gov/ofr20071156 online 200506 ground condition subbasin subbasin boundaries Data from Nichols, Harrill, SNWA, and the helicopter survey were compiled into the GIS. gb et, nichols, snwa, aerial 2005 Selected valleys were field verified using handheld GPS units interfaced with a laptop computer running the Minnesota Department of Natural Resources application DNR-Garmin (http://www.dnr.state.mn.us/mis/gis/tools/arcview/extensions.html). The application allows the user to pass data directly from the handheld GPS to ArcGIS. The application was used to locate the phreatophyte boundary in the field and adjust the boundary where necessary. Valleys that were ground verified are: Little Smoky Valley, Newark Valley, Long Valley, Jakes Valley, Butte Valley, Spring Valley, Lake Valley, and White River Valley. gb et, nichols, snwa, aerial 2005 Boundaries were reduced such that only one line existed for the boundary. Generally this was the line that would create the largest boundary. But if that boundary was found to be false from the field work a new line was drawn. gb et, nichols, snwa, aeril 2005 Secondary areas were added by digitizing areas identified using a combination of like NDVI values and image interpretation. These refined the boundaries in the basin and added some outward from the basin. NDVI 20060711 Hydrolgic area subbasins were acquired and placed in the phyreatophyte boundary dataset. subbasin 20060711 A large playa and two spring areas were added to the northern phyreatophyte boundary in Snake Valley. The boundaries were added by image interpretation of the NDVI and Landsat derived ET units. Polygons were merged with existing phyreatophyte boundary of potential areas of ground-water discharge. playa 20060718 The topology rule must not overlap was checked and fixed as needed. 2006 Vector G-polygon 34 Universal Transverse Mercator 11 0.999600 -117.000000 0.000000 500000.000000 0.000000 coordinate pair 0.000673 0.000673 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988 0.000010 feet Explicit elevation coordinate included with horizontal coordinates potgwdischarge Polygon feature class ESRI 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. hyd_area Hydrographic area number USGS 154 Newark Valley USGS 155A Little Smoky Valley USGS 174 Jakes Valley USGS 175 Long Valley USGS 178B Butte Valley USGS 179 Steptoe Valley USGS 180 Cave Valley USGS 183 Lake Valley USGS 184 Spring Valley USGS 185 Tippett Valley USGS 207 White River Valley USGS 254 Snake Valley USGS hyd_area_name hydrographic area name USGS Newark Valley hydrographic area name USGS Little Smoky Valley hydrographic area name USGS Jakes Valley hydrographic area name USGS Long Valley hydrographic area name USGS Butte Valley hydrographic area name USGS Steptoe Valley hydrographic area name USGS Cave Valley hydrographic area name USGS Lake Valley hydrographic area name USGS Spring Valley hydrographic area name USGS Tippett Valley hydrographic area name USGS White River Valley hydrographic area name USGS Snake Valley hydrographic area name USGS flow_system Major ground-water flow system number USGS 29 Newark Valley System USGS 34 Colorado System USGS 35 Goshute Valley System USGS 37 Great Salt Lake Desert System USGS OBJECTID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. flow_system_name Major ground-water flow system name USGS Newark Valley System flow system name USGS Colorado System flow system name USGS Goshute Valley System flow system name USGS Great Salt Lake Desert System flow system name USGS sub_hyd_area Concatenation of hydrographic area number and subbasin number. Subbasin numbers are from 01 to 05. For example, 15401 would be Newark Valley, first subbasin. USGS Coordinates defining the features. Polygons represent areas where phreatophytic vegetation has been mapped. The Hydrographic areas covered by these data are: > HA number HA name > 154 Newark Valley > 155 Little Smoky Valley > 174 Jakes Valley > 175 Long Valley > 178 Butte Valley > 179 Steptoe Valley > 180 Cave Valley > 183 Lake Valley > 184 Spring Valley > 185 Tippett Valley > 207 White River Valley > 254 Snake Valley If the non-proprietary shapefile is used to import the data, the name of the attribute fields will be different due to the field name length limitation of 10 characters for shapefiles. The relationships between field names are: > Feature class Shapefile > OBJECTID FID > Shape Shape > hyd_area hyd_area > hyd_area-name hyd_area_n > flow_system flow_syste > flow_system_name flow_sys_1 > sub_hyd_area sub_hyd_ar > Shape_Length Shape_Leng > Shape_area Shape_Area None. U.S. Geological Survey Ask USGS -- Water Webserver Team mailing and physical address

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/ Downloadable data. Although this data set has 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 and related materials. 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 this 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. ARCE in WinZip format 9.0 Spatial and attribute information WinZip .750 http://water.usgs.gov/GIS/dsdl/sir2007-5087_potgwdischarge.zip Shapefile in WinZip format 9.0 Spatial and attribute information WinZip .712 MB http://water.usgs.gov/GIS/dsdl/sir2007-5087_potgwdischarge_shp.zip None. unknown 20070607 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing and physical address

445 National Center

Reston Virginia 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h20team&subject=GIS+Dataset+sir2007-5087_potgwdischarge FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile