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_wlc0005 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 water-level change in the High Plains aquifer of the United States from 2000 to 2005, in feet. 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. Water-level declines occurred in parts of the High Plains aquifer soon after the onset of substantial irrigation with groundwater (about 1950). This data set was generated in ESRI ArcInfo Workstation Version 9.3, which is a geographic information system (GIS), using water-level-change data from wells measured in 2000 and 2005 and from some additional wells in New Mexico, which were measured in 2001, 2002, 2006, and 2007. For this data set, areas of no substantial change were designated as areas where water-level change was between a rise of 1 foot and a decline of 1 foot; the raster was set to zero in the areas of no substantial change. This data set was created to document the distribution of water-level change in the High Plains aquifer from 2000 to 2005 and to make available the data on this map for use with geographic information systems (GIS). 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 the U.S. Geological Survey Scientific Investigations Report (McGuire and others, 2012), which describes the methods used to generate this raster data set (Water-level change, High Plains aquifer, 2000 to 2005). This data set was released with the following related raster data sets: Water-level change, High Plains aquifer, 1980 to 1995 Water-level change, High Plains aquifer, 1995 to 2000 Water-level change, High Plains aquifer, 2005 to 2009 Saturated thickness, High Plains aquifer, 2009 Specific yield, High Plains aquifer 2009 publication date Complete Not specified -106.016217 -96.225303 43.806420 31.598356 None aquifers groundwater ground water High Plains aquifer Ogallala aquifer water-level change ISO 19115 Topic Category inlandWaters geoscientificInformation None High Plains Great Plains Colorado Kansas Nebraska New Mexico Oklahoma South Dakota Texas Wyoming None 2000 to 2005 None This data has a resolution of 500 meters and should not be used for more detailed analysis. U.S. Geological Survey V.L. McGuire Hydrologist mailing address

5231 South 19th Street

Lincoln NE 68512 USA (402)328-4126 vlmcguir@usgs.gov http://water.usgs.gov/GIS/browse/hp_wlc0005.jpg Illustration of the dataset. JPG The water-level data used to map saturated thickness was provided by numerous Federal, State, and local entities. 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. Geologoical 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. U.S. Geological Survey 2011 tabular digital data http://ne.water.usgs.gov/ogw/hpwlms/data.html online 2011 ground condition HPWLMS-website-data Provides water-level data for wells screened in the High Plains aquifer. 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 An 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. The following data and data sets were assembled: (1) water-level-change data from wells screened in the High Plains aquifer and measured in both nominal date 2000 and nominal date 2005 (available for download on the U.S. Geological Survey High Plains aquifer water-level monitoring study site at http://ne.water.usgs.gov/ogw/hpwlms/); (2) the aquifer boundary and the boundary of internal areas where the aquifer is not present (Qi, 2010); and (3) reported saturated thickness values in 1980 (Gutentag and others, 1980). HPWLMS-website-data U.S. Geological Survey DS-543 U.S. Geological Survey PP-1400-B 2011 The ESRI ArcInfo Workstation Version 9.3 topogrid command was used to interpolate the water-level change, 2000 to 2005 (attribute titled fsa_delta00_05), and generate an initial raster of the data (in feet). Then the ESRI ArcInfo Workstation Version 9.3 grid contour command was used to contour the raster for the following ranges (in feet): -35 and less, -35 to -25, -25 to -15, -15 to -5, -5 to -2, -2 to -1, -1 to 1, 1 to 2, 2 to 5, 5 to 15, and greater than 15. These contours were manually modified in areas with few water-level-change data values to limit the effects of isolated data values on the contours in those areas. Polygons were generated from the contours using the ESRI ArcInfo Workstation Version 9.3 build command and the polygons for the areas of water-level change from a rise of 1 foot to a decline of 1 foot were attributed with a field titled "startval" with a value of one.for an intermediate process. 2011 The aquifer boundary (Qi, 2010) was converted to a data point coverage titled aq_only_pt using the ESRI ArcInfo Workstation Version 9.3 command densify; An attribute, beginval, was added to the points of the aquifer boundary; and beginval was set equal to zero for all the points to reflect that there is little water-level-change data at the aquifer boundary. U.S. Geological Survey DS-543 2011 The ESRI ArcInfo Workstation Version 9.3 grid command polygrid was used to generate a raster titled g02_aqisle with the cells equal to 1 in the internal areas where the aquifer is not present (Qi, 2010). U.S. Geological Survey DS-543 2011 The ESRI ArcInfo Workstation Version 9.3 grid command polygrid was used to create a raster of the areas of water-level change between a rise of 1 foot and a decline of 1 foot. The value of the raster, titled v_nsc0005_g, is one in these areas and zero elsewhere for a temporary process to set the raster values to zero in the areas between a rise of 1 foot and a decline of 1 foot and to leave the raster values unchanged in other areas. None 2011 The ESRI ArcInfo Workstation Version 9.3 topogrid command was used to interpolate the water-level change, 2000 to 2005, and generate a final raster of the data (in feet). Inputs to the topogrid command were (1) water-level-change data from wells screened in the High Plains aquifer and measured in both nominal date 2000 and nominal date 2005 (available for download on the U.S. Geological Survey High Plains aquifer water-level monitoring study site at http://ne.water.usgs.gov/ogw/hpwlms/); (2) the aquifer boundary and the boundary of internal areas where the aquifer is not present (Qi, 2010), (3) the boundary of areas of little or no saturated thickness in the High Plains aquifer (Gutentag and others, 1984), (4) the contours of water-level change from Process Step 2. Topogrid was run with boundary equal to aq_only; point fsawell0005, attribute fsa_delta00_05; aq_only_gt, attribute beginval; contour v_wlc0005_ap, attribute contour; tolerances set to zero for tolerance 1, one for horizontal standard error, and zero for vertical standard error and with 15 iterations. The output topogrid raster was titled k_ga12a_0005. HPWLMS-website-data U.S. Geological Survey DS-543 U.S. Geological Survey PP-1400-B 2011 The ESRI ArcInfo Workstation Version 9.3 grid command setnull was used to generate a new raster, titled k_ga12b_0005, with cell values equal to k_ga12a_0005 except in cells located in 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. U.S. Geological Survey DS-543 None 2011 The ESRI ArcInfo Workstation Version 9.3 grid command con was used to generate a new raster, titled k_ga12c_0005, with cell values equal to k_ga12b_0005, except in areas where contoured water-level change was between a rise of 1 foot and a decline of 1 foot (raster v_nsc0005_g), where the cell value was set to zero. This procedure was used because in much of the area where change is between a rise of 1 foot and decline of 1 foot, there is little available water-level-change data. None 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 water-level change in the High Plains aquifer from 2000 to 2005, in feet. The cell values for water-level change, 2000 to 2005, range from a rise of 17 feet to a declines of 35 feet. 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_wlc0005 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 3638 kilobytes http://water.usgs.gov/GIS/dsdl/hp_wlc0005.zip None ASCII spatial and attribute information zip -d; unzip 4197 kilobytes http://water.usgs.gov/GIS/dsdl/hp_wlc0005a.zip None None. This dataset is provided by U.S. Geological Survey as a public service. 20111101 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