Kansas Geological Survey, Open-file Report 2012-2
Part of the Ogallala-High Plains Aquifer Project
J. J. Butler, Jr., R. L. Stotler, D. O. Whittemore, E. Reboulet, G. C. Bohling, and B. B. Wilson
with contributions by J. Munson, D. Means, and S. Ross
KGS Open File Report 2012-2
The index well program is directed at developing improved approaches for measuring and interpreting hydrologic responses at the local (section to township) scale in the High Plains aquifer (HPA) in western Kansas. The study is supported by the Kansas Water Office (KWO) with Water Plan funding as a result of KWO's interest in and responsibility for long-term planning of ground-water resources in western Kansas. The Kansas Department of Agriculture, Division of Water Resources (DWR), is providing assistance, as are Groundwater Management Districts (GMDs) 1, 3, and 4.
The project began with the installation of three transducer-equipped wells, designed and sited to function as local monitoring wells, in late summer 2007. One of these index wells is installed in each of the three western GMDs, with locations deliberately chosen to represent different water use and hydrogeologic conditions, and to take advantage of related past or current studies. A major focus of the program has been the development of criteria or methods to evaluate the effectiveness of management strategies at the subunit (e.g., township) scale. Changes in water level--or the rate at which the water level is changing--are considered the most direct and unequivocal measure of the impact of management strategies. At the time of this report, monitoring data (hourly frequency) from four full recovery and pumping seasons and one ongoing recovery season have been obtained at the three index wells; additional water-level data have been obtained from wells in the vicinity of two of the index well sites.
This report provides (a) an update of the hydrographs for the three index wells; (b) interpretation of hydrographs from the index wells and the wells in the expanded monitoring areas in the vicinity of two of the index wells; (c) a discussion of the expanded monitoring that has resulted from the findings of the index well program; (d) a discussion of the sampling and geochemical analysis of water from the three index wells and from four irrigation wells near one of the index wells; and (e) the final version of the KGS barometric correction spreadsheet program, which calculates the barometric response function for a given well and corrects the measured water levels for the impact of barometric pressure changes. A particular emphasis of this report is on the important new insights that have been obtained from the interpretation of hydrographs from the index wells and from wells in the expanded monitoring areas in the vicinity of two of the index wells.
The major findings of the project are as follows:
The focus of project activities in 2012 will be on the continuation of the detailed analyses of hydrographs from the project wells, expansion of the monitoring in the vicinity of the Scott County index well, cooperation with GMD4 on the interpretation of water-level data from monitoring wells in the Sheridan-6 subunit, further interpretation of geochemical results of analyses of water samples from the vicinity of the index wells, and an assessment of the contribution of the Dakota aquifer to pumping withdrawals in the vicinity of the Haskell County index well.
Read the PDF version (10.3 MB, May 2, 2012)
Kansas Geological Survey, Geohydrology
Placed online May 2, 2012
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