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These datasets are contours of equal silt-plus-sand thickness for bedrock aquifers in the Denver Basin aquifer system derived from the silt-plus-sand thickness points and used to estimate hydraulic conductivity and specific-yield values in a MODFLOW-2000, three-dimensional groundwater-flow model of the Denver Basin (Paschke, 2011). |
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These datasets are contours of equal silt-plus-sand thickness for bedrock aquifers in the Denver Basin aquifer system derived from the silt-plus-sand thickness points and used to estimate hydraulic conductivity and specific-yield values in a MODFLOW-2000, three-dimensional groundwater-flow model of the Denver Basin (Paschke, 2011). |
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This line dataset (PP1770_ thickness_sand_LKA_con.shp) consists of contours of equal silt-plus-sand thickness, in feet, for the lower Arapahoe aquifer (model layer 10) of the Denver Basin aquifer system, Colorado. A point dataset was generated in ArcGIS 9.2 (Environmental Systems Research Institute, Inc., 1999-2004) from the CDWR Denver Basin geophysical log database (Brian Ahrens, Colorado Division of Water Resources, written commun., 2003), and the point data were contoured using an either an ordinary kriging method or an inverse-distance weighted method available in ArcGIS, depending on which method resulted in the least error. Percent-sand values were derived by dividing the silt-plus-sand thickness values from total aquifer thickness, and the percent-sand values were subsequently used as multiplier arrange for hydraulic conductivity and specific-yield values in a in a three-dimensional groundwater-flow model of the Denver Basin (Paschke, 2011). See the "Supplemental Information" section of this metadata for more detailed descriptions of the datasets, their application, and references. |
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None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. |
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Silt-plus-sand thickness contours for the lower Arapahoe aquifer of the Denver Basin aquifer system, Colorado |
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["inlandWaters","inland waters","groundwater","lower Arapahoe aquifer","silt-plus sand thickness contours","Denver Basin aquifer system","Denver Basin","Colorado","Cretaceous","1988-2003"] |
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en-US |
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200 |
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