University of Illinois Urbana-Champaign

Water Quality in the Mahomet Aquifer: Chemical Indicators of Brine Migration and Mixing

Panno, Samuel V.; Kelly, Walton R.

Content Files
sp-07.pdf

Permalink

https://hdl.handle.net/2142/108894

Description

Title
Water Quality in the Mahomet Aquifer: Chemical Indicators of Brine Migration and Mixing
Author(s)
  • Panno, Samuel V.
  • Kelly, Walton R.
Issue Date
2020
Keyword(s)
  • Aquifers
  • Brine
  • Bromide
  • Chloride
  • Water chemistry
  • Water quality
Date of Ingest
2020-10-30T12:14:25Z
Abstract
Illinois Basin brines have unique chemical signatures (e.g., chloride/bromide [Cl/Br] mass ratios) that are useful in identifying the geologic formations from which they originated. Here we present a methodology for identifying the source of brines that have mixed with freshwater aquifers, and in this specific case, the Mahomet aquifer, a major source of water for more than 500,000 people in 15 counties throughout east-central Illinois. The use of Cl/Br mass ratios is generally applicable to water chemistry results from wells throughout the Mahomet aquifer and can be used in conjunction with other water chemistry analyses to evaluate water quality. In addition, this technique potentially could be used to evaluate water quality results from domestic water wells in the vicinity of Mahomet, Illinois, where a subsurface natural gas leak occurred in 2016 from a well in a gas storage field.
Publisher
Champaign, Ill: Illinois State Geological Survey, Prairie Research Institute
Series/Report Name or Number
Special Report no. 07
Type of Resource
text
Genre of Resource
technical report
Language
en
Permalink
http://hdl.handle.net/2142/108894
Copyright and License Information
Copyright 2020 University of Illinois Board of Trustees

Owning Collections

Special Report - Illinois State Geological Survey PRIMARY