- Abstract: In order to support science-based water resource management, a systematic effort was undertaken to characterize the nature and function of the hydrogeology in Jo Daviess County, Illinois. Jo Daviess County is a karst area. Karst is a geologically and hydrologically integrated or interconnected and self-organizing network of landforms and subsurface large-scale, secondary porosity created by a combination of fractured carbonate bedrock, the movement of water into and through the rock body as part of the hydrologic cycle, and physical and chemical weathering (Panno, S.V. et al, 2017). Springs, cover-collapse sinkholes, crevices, and caves are among the defining features of a karst terrain; each of these features is found in Jo Daviess County. Examples of these features have been located in the field and characterized by scientists from the Illinois State Geological and Water Surveys (Prairie Research Institute, University of Illinois at Urbana-Champaign). For this project, groundwater samples were collected from springs and wells and analyzed for microplastics, and a set of chemicals found in pharmaceuticals and personal care products. This project was supported by the University of Illinois Prairie Research Institute’s Illinois State Geological Survey, Illinois State Water Survey, and Illinois Sustainable Technology Center. The publication cited below references the data and provides interpretation: Panno, S.V., Walton R. Kelly, John Scott, Wei Zheng, Rachel E. McNeish, Nancy Holm, Timothy J. Hoellein, and Elizabeth L. Baranski. Microplastic Contamination in Karst Groundwater Systems. Groundwater. 57(2):189-196. doi:10.1111/gwat.12862, 2019. https://ngwa.onlinelibrary.wiley.com/doi/10.1111/gwat.12862 The publications cited below provide background and context: Panno, S.V., W.R. Kelly, and E.L. Baranski. Hydrogeochemical controls on aquifers of northwestern Illinois’ Driftless Area, USA. Environmental Earth Sciences 78:276, 2019. https://doi.org/10.1007/s12665-019-8271-7 Panno, S.V. and D.E. Luman. Assessment of the geology and hydrogeology of two sites for a proposed large dairy facility in Jo Daviess County near Nora, IL. Illinois State Geological Survey Open File Series 2008-2, 2008. http://library.isgs.illinois.edu/Pubs/pdfs/ofs/2008/ofs2008-02.pdf Panno, S.V., Donald E. Luman, and Dennis R. Kolata. Characterization of karst terrain and regional tectonics using remotely sensed data in Jo Daviess County, Illinois. Circular 589, Illinois State Geological Survey, Prairie Research Institute, University of Illinois Urbana-Champaign, 2015. https://www.isgs.illinois.edu/maps/county-maps/karst-terrain/jo-daviess Panno, S.V., Philip G. Millhouse, Randy W. Nyboer, Daryl Watson, Walton R. Kelly, Lisa M. Anderson, Curtis C. Albert, and Donald E. Luman. Guide to the Geology, Hydrogeology, History, Archaeology, and Biotic Ecology of the Driftless area of Northwestern Illinois, Jo Daviess County. Illinois State Geological Survey Guidebook 42, 2016. https://www.isgs.illinois.edu/publications/gb042Panno, S.V., Donald E. Luman, Walton R. Kelly, Timothy H. Larson, and Stephen J. Taylor. Karst of the Driftless Area of Jo Daviess County, Illinois. Circular 586, Illinois State Geological Survey, Prairie Research Institute, University of Illinois Urbana-Champaign, 2017. https://isgs.illinois.edu/maps/county-maps/karst-terrain/jo-daviess-0
- Purpose: GIS-formatted field data documenting microplastics and the co-occurrence of other anthropogenic contaminants in spring and well groundwater samples taken from the shallow karst aquifer of Jo Daviess County, Illinois. This is one of several datasets compiled for the Karst Feature Database of Jo Daviess County, IL and hosted by the U.S. Fish & Wildlife Service.
Thumbnail photo credit: Timothy Hoellein, Aquatic Ecologist, Associate Professor, Biology Department, Loyola University at Chicago
- Supplemental Information: Springs are common in karst areas. Springs discharging from exposed carbonate bedrock can be indicators of karst bedrock and karst aquifers. However, the absence of such springs does not imply the lack of karst bedrock and karst aquifers.