V.L. McGuire K.D. Lund B.K. Densmore 2012 raster digital data U.S. Geological Survey Scientific Investigations Report USGS SIR 2012-5177 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?sir12-5177_hp_sp_yield V.L. McGuire K.D. Lund B.K. Densmore 2012 document U.S. Geological Survey Scientific Investigations Report USGS SIR 2012-5177 Reston, VA U.S. Geological Survey http://pubs.er.usgs.gov/publication/sir20125177 This raster data set represents specific-yield ranges in the High Plains aquifer of the United States. The High Plains aquifer underlies 112.6 million acres (176,000 square miles) in parts of eight States: Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. Specific yield ranges from near zero to 30 percent (Gutentag and others, 1984). This data set was generated in ESRI ArcInfo Workstation Version 9.3, which is a geographic information system (GIS), from a contour map of specific-yield ranges. REFERENCES CITED -- Gutentag, E.D., Heimes, F.J., Krothe, N.C., Luckey, R.R., and Weeks, J.B., 1984, Geohydrology of the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming: U.S. Geological Survey Professional Paper 1400-B, 63 p. This data set was created to provide a raster of the average specific yield in each of the specific-yield ranges for the High Plains aquifer and to make available the data on this map for use with a GIS. Specific yield is used to calculate drainable water in storage in the High Plains aquifer from applicable water-level change and saturated-thickness data. This data set was generated at the request of the U.S. Department of Agriculture, Farm Service Agency. This raster data set is associated with a U.S. Geological Survey Scientific Investigations Report (McGuire and others, 2012), which describes the methods used to generate this raster data set and the following related raster data sets: 1980 to 1995 water-level change, High Plains aquifer 1995 to 2000 water-level change, High Plains aquifer 2000 to 2005 water-level change, High Plains aquifer 2005 to 2009 water-level change, High Plains aquifer Saturated thickness, High Plains aquifer, 2009 2011 publication date Complete Not specified -106.016217 -96.225303 43.806420 31.598356 None aquifers groundwater ground water High Plains aquifer Ogallala aquifer specific yield ISO 19115 Topic Category inlandWaters geoscientificInformation None High Plains Great Plains Colorado Kansas Nebraska New Mexico Oklahoma South Dakota Texas Wyoming None This data has a resolution of 500 meters and should not be used for more detailed analysis. Virginia L. McGuire U.S. Gelogical Survey Hydrologist mailing address

Nebraska Water Science Center

5231 South 19th Street

Lincoln NE 68512-1271 USA (402)328-4126 (402)328-4101 vlmcguir@usgs.gov http://water.usgs.gov/GIS/browse/hp_sp_yield.jpg Illustration of the dataset. JPG The specific yield map of specific yield ranges was published as a paper map by Gutentag and others (1984) and as a digital contour map by Cederstrand and Becker (1998). Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000 V.L. McGuire K.D. Lund B.K. Densmore 2012 U.S. Geological Survey Scientific Investigations Report USGS SIR 2012-5177 Reston, VA U.S. Geolgoical Survey See Entity Attribute information. Not applicable for raster data. Data set is complete for the High Plains areas. Data gaps within the High Plains boundary indicate areas where the aquifer is not present. The data set has a horizontal resolution of 500 meters. Sharon L. Qi 2010 vector digital data Digital Data Series 543 Reston, VA U.S. Geological Survey http://pubs.usgs.gov/ds/543/ online 2010 publication date U.S. Geological Survey DS-543 A update to the boundary of the High Plains aquifer and the boundary of internal areas where the aquifer is not present. This is an update of the boundary presented in Gutentag and others (1984). E.D. Gutentag F.J. Heimes N.C. Krothe R.R. Luckey J.B. Weeks 1984 map Professional Paper 1400-B Reston, VA U.S. Geological Survey http://pubs.er.usgs.gov/publication/pp1400B paper 1984 publication date U.S. Geological Survey PP-1400-B Boundary of the High Plains aquifer and boundary of internal areas where the aquifer is not present. J.R. Cederstrand M.F. Becker 1998 Open-File Report 98-414 Reston, VA U.S. Geological Survey http://water.usgs.gov/GIS/metadata/usgswrd/XML/ofr98-414.xml online 1984 ground condition U.S. Geological Survey OFR 98-414 These contours of specific-yield ranges were used to generate the output raster. The following data and data sets were assembled: (1) the aquifer boundary and the boundary of internal areas where the aquifer is not present (Qi, 2010), (2) the published map of specific yield ranges for the High Plains aquifer (Gutentag and others, 1984; Cederstrand and Becker, 1998). USGS DS-543 USGS PP-1400-B USGS OFR 98-414 2011 The lines that form the aquifer boundary in the published map of specific yield (Cederstrand and Becker, 1998) were deleted using the ESRI ArcInfo Workstation version 9.3 ArcEdit program. The line in the revised aquifer boundary (Qi, 2010), including revised areas where the aquifer is not present, were merged with the specific-yield data set using the ESRI ArcInfo Workstation version 9.3 union command. The original specific-yield lines were adjusted to reflect the new boundary by assuming that where the boundary was modified, the specific-yield range in the modified aquifer area was the same as the specific yield of the adjacent original aquifer area. The specific-yield lines were made into polygons using the ESRI ArcInfo Workstation version 9.3 build command. The specific-yield polygons were populated with the attribute midrange. Midrange was set equal to one-half the specific-yield-polygon range. The resulting polygon data set was titled hp_sy_u_bnd_c. USGS DS-543 USGS OFR 98-414 2011 The ESRI ArcInfo Workstation version 9.3 grid command polygrid was used to create a raster of the average specific yield in each of the specific-yield ranges in polygon hp_sy_u_bnd_c. The output grid was named ghp_sy_u_bd_c. None 2011 The ESRI ArcInfo Workstation version 9.3 grid command setnull was used to generate a new raster, titled hp_sp_yield, with cell values equal to ghp_sy_u_bd_c except in cells within the internal areas within the aquifer boundary where the aquifer is not present (raster g02_aqisle); in these areas, the cell value was set to null. USGS DS-543 2011 Raster Grid Cell 2659 1569 1 Albers Conical Equal Area 29.500000 45.500000 -96.000000 23.000000 0.000000 0.000000 row and column 500.000000 500.000000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 The values of the raster data set represent average specific yield within the mapped specific-yield range for the High Plains aquifer, as a decimal fraction, which is less than one. This raster data set is associated with the report (McGuire and others, 2012) titled "Saturated thickness and water in storage in the High Plains aquifer, 2009, and water-level changes and changes in water in storage in the High Plains aquifer, 1980 to 1995, 1995 to 2000, 2000 to 2005, and 2005 to 2009." U.S. Geological Survey Ask USGS -- Water Webserver Team mailing address

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+sir12-5177_hp_sp_yield Downloadable Data 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. ArcInfo Workstation GRID spatial and attribute information zip -d; unzip 581 kilobytes http://water.usgs.gov/GIS/dsdl/hp_sp_yield.zip None ASCII spatial and attribute information zip -d; unzip 219 kilobytes http://water.usgs.gov/GIS/dsdl/hp_sp_yielda.zip None None. This dataset is provided by U.S. Geological Survey as a public service. 11012011 20111229 U.S. Geological Survey Ask USGS - Water Webserver Team mailing

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Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://water.usgs.gov/user_feedback_form.html FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998