Installation and Operation of a Rain Gauge and Observation Well Network in Mason and Tazewell Counties, Illinois, Illinois State Water Survey

Groundwater Science

Tazewell and Mason counties

Installation and Operation of a Rain Gauge and Observation Well Network in Mason and Tazewell Counties, Illinois

Principal Investigators: Steve Wilson, Nancy Westcott, Kevin Rennels

Project Staff: Steve Wilson, Erin Bauer, Kevin Rennels

Project Period: June 1992 – August 2017
Sponsor: The Imperial Valley Water Authority

The Illinois State Water Survey (ISWS), under contract to the Imperial Valley Water Authority (IVWA), has operated a network of rain gauges in Mason and Tazewell Counties since August 1992 and a network of groundwater observation wells since 1994. The purpose of the rain gauge and groundwater observation well networks is to collect long-term data to determine the impact of groundwater withdrawals during dry periods and during the growing season, and the rate at which the aquifer recharges.

Findings to Date:
Transducers that allow for near continuous measurement of water levels in monitoring wells have allowed us to correlate the timing of rainfall to changes in aquifer levels. These data indicate that, depending on location and time of year, rainfall events can have a significant effect on recharge to the aquifer. Water level changes can occur within a day of the rainfall event. Data are being collected to establish a relationship among depth to the water table, time of year, and magnitude of rainfall events, to better predict aquifer recharge. The figure at right shows an example of water level changes in the aquifer due to rainfall (from Year 19).

Project Letters and Updates:

In 2009, the Illinois State Water Survey began providing project update letters to the Imperial Valley Water Authority in lieu of Contract Reports.

Letter for Year 23: September 2014-August 2015

Letter for Year 22: September 2013-August 2014

Letter for Year 21: September 2012-August 2013

Letter for Year 20: September 2011-August 2012

Letter for Year 19: September 2010-August 2011

Letter for Year 18: September 2009-August 2010

Letter for Year 17: September 2008-August 2009

Letter for Year 16: September 2007-August 2008

Project Publications:

Operation of Rain Gauge and Groundwater Monitoring Networks for the Imperial Valley Water Authority, Year 15: September 2006-August 2007, Westcott, Nancy E., Kevin L. Rennels, Steven D. Wilson, 2009 ISWS CR 2009-05.

Operation of Rain Gauge and Groundwater Monitoring Networks for the Imperial Valley Water Authority: Year 14: Sept. 2005-Aug. 2006, Wilson, Steven D., Nancy E. Westcott, and Kevin L. Rennels, 2008 ISWS CR 2008-12.

Operation of Rain Gauge and Groundwater Monitoring Networks for the Imperial Valley Water Authority, Year 13: September 2004-August 2005, Wilson, Steven D., Nancy E. Westcott, Kevin L. Rennels, H. Allen Wehrmann, 2009 ISWS CR 2009-08 .

Operation of Rain Gauge and Groundwater Monitoring Networks for the Imperial Valley Water Authority Year Twelve: September 2003-August 2004, Wilson, Steven D., H. Allen Wehrmann, Kevin L. Rennels, Nancy E. Westcott, 2008 ISWS CR 2008-06.

Data:

Daily precipitation observations from the Imperial Valley Precipitation gages are available from the Imperial Valley Precipitation Network Daily Data Archive.



 


 


 


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