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#2192 Risk of Desaturation of Sandstone Aquifers WEBINAR IEPA#9933

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12/14/15 Risk of Desaturation of Sandstone Aquifers in Will-Kendall-Kane Counties WEBINAR IEPA#9933

LIVE DATE: 12/14/15
IEPA#: 9928
IDEM#: PWST15-5613


In 2014-2015, the Illinois State Water Survey (ISWS) completed their largest synoptic measurement of sandstone water levels in Illinois since 1980. In northeastern Illinois, water levels were typically over 300 ft lower than predevelopment conditions. In the Joliet region, drawdown from predevelopment exceeded 800 ft. Three factors drove this large drawdown. First, demands in the area are relatively high. Second, the sandstone is overlain by low permeable shale and/or carbonates that limit the vertical infiltration of water. Third, much of the pumping in the Joliet region is close to the Sandwich Fault Zone, which acts as a low flow barrier. Heads near the center of the northeastern Illinois cone of depression continue to have a decreasing trend. 

The most severe drawdown in northeastern Illinois has resulted in local areas of dewatering (or desaturation) of the sandstone, which can cause a number of water quantity and quality concerns. The uppermost sandstone, the St. Peter, has been observed to be partially desaturated in portions of Will, Kendall, and Kane Counties. The ISWS has utilized a newly revised groundwater flow model of northeastern Illinois to determine the risk of desaturation of the sandstone aquifer system under a number of different future water use demand and management scenarios. The results emphasize the importance of regional cooperation to ensure the long-term viability of the deep sandstone aquifer system. 

Presenter:Daniel Abrams, Ph.D., Groundwater Flow Modeler, Illinois State Water Survey


Daniel joined the Illinois State Water Survey in July 2013. He earned a Ph.D. in Environmental Science at Indiana University (Bloomington). He has professional interests in the development of conceptual and numerical groundwater flow models of the shallow and deep aquifer systems throughout Illinois. His recent work has focused on rapidly declining water levels in the deep sandstone aquifers of northeastern Illinois.


COST & REGISTRATION: Illinois Section AWWA Members: FREE; Nonmembers: $30

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