Abstract

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Paper
Groundwater Resource Planning--Defining the Shallow Aquifer System
Track: Water Resources
Author(s): Kurt Thomsen, Janet Agnoletti, Connie Pokorny

To establish water resource baseline conditions using limited resources, the Barrington Area Council of Governments (BACOG) developed a method to produce baseline hydrogeologic unit maps from readily available borehole log data using GIS querying techniques. Borehole strata descriptions were converted to numerical values by establishing the average hydraulic conductivity of the combined soils making up the stratum of interest. These hydraulic conductivity values were then used to assign each stratum to a hydrogeologic unit based on typical ranges of hydraulic conductivity for aquifers, aquitards and aquicludes. In this manner, the well log data was queried to describe the shallow aquifer system. The bedrock surface, basal aquifer and overlying stratigraphy were described. Aquifers, aquitards and aquicludes overlying the bedrock were defined and preliminary interrelationships were established. Analysis of the resulting information produced cross-sections in areas of interest and identification of potential recharge areas.

Kurt Thomsen
KOTECI
1706 Michigan Boulevard
Racine , WI 53402-4933
US
Phone: 262 880 5272
Fax: 262 634 7488
E-mail: thomsenko@aol.com

Janet Agnoletti
Barrington Area Council of Governments
218 West Main Street
Barrington , IL 60010
US
Phone: 847 381 7871
Fax: 847 381 7882
E-mail: j.agnoletti@bacog.org

Connie Pokorny
Barrington Area council of Governments
218 West Main Street
Barrington , IL 60010
US
Phone: 847 381 7871
Fax: 847 381 7882
E-mail: c.pokorny@bacog.org