KT3D_H2O: A Program for Kriging Water Level Data Using Hydrologic Drift Terms |
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Authors: | by Marinko Karanovic Matthew Tonkin David Wilson |
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Affiliation: | S.S. Papadopulos &Assoc. Inc., 7944 Wisconsin Avenue, Bethesda, MD 20814;(301) 718-8900;;USEPA Region V GEOS Program, 77 W. Jackson Blvd., Chicago, IL 60604;(312) 886-1476; |
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Abstract: | It is often necessary to estimate the zone of contribution to, or the capture zone developed by, pumped wells: for example, when evaluating pump-and-treat remedies and when developing wellhead protection areas for supply wells. Tonkin and Larson (2002) and Brochu and Marcotte (2003) describe a mapping-based method for estimating the capture zone of pumped wells, developed by combining universal kriging (kriging with a trend) with analytical expressions that describe the response of the potentiometric surface to certain applied stresses. This Methods Note describes (a) expansions to the techinque described by Tonkin and Larson (2002) ; (b) the concept of the capture frequency map (CFM), a technique that combines information from multiple capture zone maps into a single depiction of capture; (c) the development of a graphical user interface to facilitate the use of the methods described; and (d) the integration of these programs within the MapWindow geographic information system environment. An example application is presented that illustrates ground water level contours, capture zones, and a CFM prepared using the methods and software described. |
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