Adams, Gregory P. Runkle, Donna Rea, Alan 1997 1.0 map Open-File Report 96-446 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr96-446_cond This data set consists of digital hydraulic conductivity values for the alluvial and terrace deposits along the Beaver-North Canadian River from the panhandle to Canton Lake in northwestern Oklahoma. Ground water in 830 square miles of the Quaternary-age alluvial and terrace aquifer is an important source of water for irrigation, industrial, municipal, stock, and domestic supplies. The aquifer consists of poorly sorted, fine to coarse, unconsolidated quartz sand with minor amounts of clay, silt, and basal gravel. The hydraulically connected alluvial and terrace deposits unconformably overlie the Tertiary-age Ogallala Formation and Permian-age formations. Six zones of ranges of hydraulic conductivity values for the alluvial and terrace deposits reported in a ground-water modeling report are used in this data set. The hydraulic conductivity values range from 0 to 160 feet per day, and average 59 feet per day. The features in the data set representing aquifer boundaries along geological contacts were extracted from a published digital surficial geology data set based on a scale of 1:250,000. The geographic limits of the aquifer and zones representing ranges of hydraulic conductivity values were digitized from folded paper maps, at a scale of 1:250,000 from a ground-water modeling report. Ground-water flow models are numerical representations that simplify and aggregate natural systems. Models are not unique; different combinations of aquifer characteristics may produce similar results. Therefore, values of hydraulic conductivity used in the model and presented in this data set are not precise, but are within a reasonable range when compared to independently collected data. This data set was created for a project to develop data sets to support ground-water vulnerability analysis. The objective was to create and document a digital geospatial data set from a published report or map, or existing digital geospatial data sets that could be used in ground-water vulnerability analysis. Introduction -- This data set consists of digital hydraulic conductivity values for the alluvial and terrace deposits along the Beaver-North Canadian River from the panhandle to Canton Lake in northwestern Oklahoma. Ground water in 830 square miles of the Quaternary-age alluvial and terrace aquifer is an important source of water for irrigation, industrial, municipal, stock, and domestic supplies. The aquifer consists of poorly sorted, fine to coarse, unconsolidated quartz sand with minor amounts of clay, silt, and basal gravel. The hydraulically connected alluvial and terrace deposits unconformably overlie the Tertiary-age Ogallala Formation and Permian-age formations (Davis and Christenson, 1981). The hydraulic-conductivity values reported in Davis and Christenson (1981) and used in this report were determined during the calibration of a steady-state model of the alluvial and terrace deposits. The hydraulic-conductivity values range from 0 to 160 feet per day, and average 59 feet per day (Davis and Christenson, 1981, p. 24). The hydraulic conductivity values tend to decrease with distance from the Beaver-North Canadian River. The aquifer is divided into six zones representing ranges of hydraulic conductivity values. The polygon attribute K contains a code of 1 through 6 that represents different ranges of hydraulic conductivity values (Davis and Christenson, 1981, plate 7). The codes and ranges of hydraulic conductivity for the attribute K in feet per day are: 1 = K less than 20 feet per day; 2 = K greater than or equal to 20 feet per day and less than 40 feet per day; 3 = K greater than or equal to 40 feet per day and less than 60 feet per day; 4 = K greater than or equal to 60 feet per day and less than 80 feet per day; 5 = K greater than or equal to 80 feet per day and less than 100 feet per day; 6 = K greater than 100 feet per day; and -99999 = K not known. The lines in the data set representing aquifer boundaries along geological contacts were extracted from a published digital surficial geology data set (Cederstrand, 1996) based on a scale of 1:250,000. The polygon boundaries of zones of hydraulic conductivity values were digitized from a folded paper map in the U.S. Geological Survey publication, "Geohydrology and numerical simulation of the alluvium and terrace aquifer along the Beaver-North Canadian River from the panhandle to Canton Lake, northwestern Oklahoma," by Davis and Christenson (1981, plate 7). Additional boundaries defining the the geographic limits of the aquifer were digitized from a folded paper map at a scale of 1:250,000 by Davis and Christenson (1981, plate 3). Ground-water flow models are numerical representations that simplify and aggregate natural systems. Models are not unique; different combinations of aquifer characteristics may produce similar results. The hydraulic conductivity and recharge are closely interrelated. As long as these two model inputs are in balance the model has a small mean residual; it represents the natural system numerically. If the hydraulic conductivity is accurately known, the model can be used to accurately determine recharge. Likewise, if the hydraulic conductivity is poorly known, then the recharge will be poorly determined. Therefore, values of hydraulic conductivity used in the model and presented in this data set are not precise, but are within a reasonable range when compared to independently collected data. In most aquifers, hydraulic conductivity measurements made in wells or in cores will range over several orders of magnitude, even over short horizontal and vertical distances. Hydraulic conductivity values derived from ground-water flow models represent areal generalizations and do not reflect the large local variance in well or core measurements. Reviews Applied to Data -- This electronic report was subjected to the same review standard that applies to all U.S. Geological Survey reports. Reviewers were asked to check the topological consistency, tolerances, attribute frequencies and statistics, projection, and geographic extent. Reviewers were given digital data sets and paper plots for checking against the source maps to verify the linework and attributes. The reviewers checked the metadata and a_readme.1st files for completeness and accuracy. Related Spatial and Tabular Data Sets -- This data set is one of four digital map data sets being published together for this aquifer. The four data sets are: > aqbound - aquifer boundaries > cond - hydraulic conductivity > recharg - aquifer recharge > wlelev - water-level elevation contours Digital map data sets of the Oklahoma surficial geology digitized from 1:250,000-scale maps (or 1:125,000-scale maps for the three Oklahoma panhandle counties) are published separately. Other References Cited -- Cederstrand, J.R., 1996, Digital geologic map of Woodward quadrangle, northwest Oklahoma: U.S. Geological Survey Open-File Report 96-381, based on a scale of 1:250,000, 2 diskettes. (Available in nonproprietary and ARC/INFO formats.) URL:http://wwwok.cr.usgs.gov/gis/geology/index.html Davis, R.E. and Christenson, S.C., 1981, Geohydrology and numerical simulation of the alluvium and terrace aquifer along the Beaver-North Canadian River from the panhandle to Canton Lake, northwestern Oklahoma: U.S. Geological Survey Open-file Report 81-483, 42 p., 15 pl. Environmental Systems Research Institute, Inc. (ESRI), 1995, ARC/INFO Command Reference, ARC/INFO On-line manuals: Redlands, CA. Notes -- 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 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. 1981 publication date Complete None planned -99.9650 -98.5487 36.9727 36.0439 none ground-water vulnerability groundwater vulnerability aquifers ground water groundwater North Canadian River alluvial and terrace aquifer North Canadian alluvial and terrace aquifer Beaver River alluvial and terrace aquifer Beaver alluvial and terrace aquifer alluvial and terrace aquifer terrace aquifer alluvial aquifer terrace terrace deposits alluvium hydraulic conductivity inlandWaters none northwestern Oklahoma None. Lines representing geological contacts were extracted from the digital geology data set by Cederstrand (1996), based on a scale of 1:250,000. Lines representing the geographic limits of the aquifer were digitized from a folded paper map (30 inches by 22 inches) at a scale of 1:250,000 from Davis and Christenson (1981, plate 7). The lines digitized from the source map had a maximum registration root-mean-squared-error (RMSE) of 0.018 map inches (0.046 centimeters) or 377.76 feet (115.14 meters) ground distance. Boundaries represented at these scales are indicative of broad, regional trends and should not be interpreted as site specific. Ground-water flow models are numerical representations that simplify and aggregate natural systems. Models are not unique; different combinations of aquifer characteristics may produce similar results. The hydraulic conductivity and recharge are closely interrelated. As long as these two model inputs are in balance the model has a small mean residual; it represents the natural system numerically. If the hydraulic conductivity is accurately known, the model can be used to accurately determine recharge. Likewise, if the hydraulic conductivity is poorly known, then the recharge will be poorly determined. Therefore, values of hydraulic conductivity used in the model and presented in this data set are not precise, but are within a reasonable range when compared to independently collected data. In most aquifers, hydraulic conductivity measurements made in wells or in cores will range over several orders of magnitude, even over short horizontal and vertical distances. Hydraulic conductivity values derived from ground-water flow models represent areal generalizations and do not reflect the large local variance in well or core measurements. Donna L. Runkle U.S. Geological Survey Hydrologist mailing address

202 NW 66th St., Bldg. 7

Oklahoma City Oklahoma 73116 United States of America 1-888-275-8747 (405) 843-7712 dlrunkle@usgs.gov none http://water.usgs.gov/lookup/get?OFR96-446/browse.gif A browse image of the four aquifer data sets. GIF Compilation of this data set and the associated metadata was funded under a cooperative Joint Funding Agreement between the U.S. Geological Survey and the State of Oklahoma, Office of the Secretary of Environment. Public UNCLASSIFIED None Operating System-- UNIX, ARC/INFO Version 7.0.3,(Mon Mar 13 22:21:55 PST 1995) Cederstrand, Joel R. 1996 1.0 map Open-File Report 96-381 Oklahoma City, OK U.S. Geological Survey http://wwwok.cr.usgs.gov/gis/geology/index.html Chain-node topology present. This data set includes the areas of specified hydraulic conductivity published on plate 7 by Davis and Christenson (1981). Boundaries with a value of 2 for the LSOURCE line attribute were taken from Cederstrand (1996). None 64 meters Resolution as reported None. Boundaries along geological contacts were extracted from a digital geology data set. The ARC/INFO CLEAN command (ESRI, 1995) was used with a dangle length of 0.0 feet or meters and fuzzy tolerance of 10.0 meters. The ARC/INFO PROJECT command (ESRI, 1995) was used to convert the extracted data set projection from Albers Conical Equal Area to Universal Transverse Mercator-Zone 14. 1996 Ten registration tics were located on the data set and the source map at township and range corners. The 10 registration tics were projected into Universal Transverse Mercator-Zone 14, which was the projection used for manual digitizing. The polygon boundaries were digitized in two sessions with a maximum registration root-mean-squared error (RMSE) of 0.018 inches (0.046 centimeters) map distance or 377.76 feet) 115.14 meters ground distance. 1996 The data set was edited to delete extraneous pseudo and dangle nodes. The ARC/INFO CLEAN command (ESRI, 1995), was used with a dangle length of 32.8 feet (10.0 meters) and fuzzy tolerance of 0.0 feet or meters. 1996 The registration tics used in the initial digitizing were township and range corners taken form 1:24,000-scale topographic maps. A comparison of a paper plot of the data set with the source map showed that the township and range corners were not in the same locations on the 1:250,000-scale source map. To correct the problem a 1:250,000-scale U.S. Geological Survey quadrangle map was registered using latitudinal and longitudinal registration tics, with a maximum root-mean-squared-error (RMSE) of 0.003 inches (0.007 centimeters) map distance or 72.97 feet (22.24 meters) ground distance. Ten registration tics were selected and digitized from the quadrangle map, and given the same tic identification numbers as the tics that were used initially. These new tics were used with the ARC/INFO TRANSFORM command (ESRI, 1995) to adjust the digitized lines to more closely match the source map. The registration root-mean-squared-error (RMSE) for TRANSFORM was 403.90 feet (123.11 meters) ground distance or 0.019 map inches (0.048 map centimeters). 1996 The ARC/INFO PROJECT command (ESRI, 1995) was used to convert the data set projection from Universal Transverse Mercator-Zone 14 to Albers Conical Equal Area. The ARC/INFO CLEAN command (ESRI, 1995) was used with a dangle length of 0.0 feet (0.0 meters) and fuzzy tolerance of 32.8 feet (10.0 meters). Polygons were attributed for K and lines were attributed for LSOURCE. Verification of attribute codes were made by comparing a paper plot of the data set with the source map. 1996 Vector Point 101 String 301 GT-polygon composed of chains 102 Albers Conical Equal Area 29.5 45.5 -96 23 0.0 0.0 coordinate pair 64 meters 64 meters METERS North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 COND.PAT Polygon attribute table ARC/INFO - Polygon attribute table ARC/INFO - n/a n/a AREA Area of polygon in square coverage units Computed Positive real numbers n/a n/a PERIMETER Perimeter of polygon in coverage units Computed Positive real numbers n/a n/a COND# Internal feature number Computed Sequential unique positive integer n/a n/a COND-ID User-assigned feature number User-defined Integer n/a n/a K Ranges of k values by zones, see Entity_and _Attribute_Overview Section Davis and Christenson (1981) 1,2,3,4,5,6, -99999 Zone 1, less than 20 feet per day Zone 2, greater than or equal to 20 feet per day and less than 40 feet per day Zone 3, greater than or equal to 40 feet per day and less than 60 feet per day Zone 4, greater than or equal to 60 feet per day and less than 80 feet per day Zone 5, greater than or equal to 80 feet per day and less than 100 feet per day Zone 6, greater than or equal to 100 feet per day Davis and Christenson (1981) MAJOR1 Ranges of k values by zones, see Entity_and _Attribute_Overview Section Davis and Christenson (1981) 1,2,3,4,5,6, -99999 Zone 1, less than 20 feet per day Zone 2, greater than or equal to 20 feet per day and less than 40 feet per day Zone 3, greater than or equal to 40 feet per day and less than 60 feet per day Zone 4, greater than or equal to 60 feet per day and less than 80 feet per day Zone 5, greater than or equal to 80 feet per day and less than 100 feet per day Zone 6, greater than or equal to 100 feet per day Davis and Christenson (1981) MINOR1 Blank item for DLG Calculated 0 n/a n/a COND.AAT Arc attribute table ARC/INFO - Arc attribute table ARC/INFO - n/a n/a FNODE# Internal number of from-node Computed Sequential unique positive integer n/a n/a TNODE# Internal number of to-node Computed Sequential unique positive integer n/a n/a LPOLY# Internal number of polygon to left of arc Computed Sequential unique positive integer n/a n/a RPOLY# Internal number of polygon to right of arc Computed Sequential unique positive integer n/a n/a LENGTH Length of arc in coverage units Computed Positive real numbers n/a n/a COND# Internal feature number Computed Sequential unique positive integer n/a n/a COND-ID User-assigned feature number User-defined Integer n/a n/a LSOURCE Source of line Davis and Christenson (1981), Cederstrand (1996) 1,2 n/a n/a MAJOR1 Source of line Davis and Christenson (1981), Cederstrand (1996) 1,2 n/a n/a MINOR1 Blank item for DLG Calculated 0 n/a n/a Each polygon in this data set has an associated attribute, K, containing a code of 1 through 6 that represents a range of hydraulic conductivity values. The codes and ranges of hydraulic conductivity for the attribute K in feet per day (ft/d) are as follows: 1 = K less than 20 ft/d; 2 = K greater than or equal to 20 ft/d and less than 40 ft/d; 3 = K greater than or equal to 40 ft/d and less than 60 ft/d; 4 = K greater than or equal to 60 ft/d and less than 80 ft/d; 5 = K greater than or equal to 80 ft/d and less than 100 ft/d; 6 = K greater than 100 ft/d; -99999 = K is not known K code is stored in the first major code (MAJOR1) for polygons, and 0 is stored in the first minor code (MINOR1) in the Digital Line Graph (DLG) version of this data set. Each line in this digital data set has an associated attribute, LSOURCE, that contains a code to indicate the line source. An LSOURCE code of 1 indicates the line was digitized from Davis and Christenson (1981), and an LSOURCE code of 2 indicates the line was extracted from Cederstrand (1996). LSOURCE is stored in the first major code (MAJOR1) for lines, and 0 is stored in the first minor code (MINOR1) in the Digital Line Graph (DLG) version of this data set. See overview. 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://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr96-446_cond 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. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Export Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/ofr96-446_cond.e00.gz Other DLG file format zipped 1 http://water.usgs.gov/GIS/dsdl/ofr96-446_cond.dlg.gz None. This dataset is provided by USGS as a public service. 20041108 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://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr96-446_cond FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998