A Multiscale Assessment of Shallow Groundwater Salinization in Michigan

Ground Water
Zachary K CurtisDavid P Lusch

Abstract

Managing nonpoint-source (NPS) pollution of groundwater systems is a significant challenge because of the heterogeneous nature of the subsurface, high costs of data collection, and the multitude of scales involved. In this study, we assessed a particularly complex NPS groundwater pollution problem in Michigan, namely, the salinization of shallow aquifer systems due to natural upwelling of deep brines. We applied a system-based approach to characterize, across multiple scales, the integrated groundwater quantity-quality dynamics associated with the brine upwelling process, assimilating a variety of modeling tools and data-including statewide water well datasets scarcely used for larger scientific analysis. Specifically, we combined (1) data-driven modeling of massive amounts of groundwater/geologic information across multiple spatial scales with (2) detailed analysis of groundwater salinity dynamics and process-based flow modeling at local scales. Statewide "hotspots" were delineated and county-level severity rankings were developed based on dissolved chloride (Cl- ) concentration percentiles. Within local hotspots, the relative impact of upwelling was determined to be controlled by: (1) streams-which act as "natural pumps" that...Continue Reading

References

Feb 7, 2004·Ground Water·William M Alley, Stanley A Leake
Apr 16, 2013·Ground Water·Katelyn A WatsonHoward W Reeves
Jan 13, 2016·Ground Water·Daniel T FeinsteinChristian D Langevin

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Citations

May 27, 2020·Environmental Science and Pollution Research International·Amir JamshidiParisa Razmara

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