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dc.contributor.authorShedlock, Robert J.
dc.contributor.authorWilcox, Douglas A.
dc.contributor.authorThompson, Todd A.
dc.contributor.authorCohen, David A.
dc.date.accessioned2021-09-07T17:41:13Z
dc.date.available2021-09-07T17:41:13Z
dc.date.issued1993-01-01
dc.identifier.urihttp://hdl.handle.net/20.500.12648/2317
dc.descriptionAuthors were government employers of the following agencies: U.S. Geological Survey and the National Park Service
dc.description.abstractWetlands between, and within, dune-beach complexes along the south shore of Lake Michigan are strongly affected by ground water. The hydrogeology of the glacial drift aquifer system in a 26 km2 area was investigated to determine the effects of ground water on the hydrology and hydrochemistry of Cowles Bog and its adjacent wetlands. The investigation showed that ground water from intermediate- and regional-scale flow systems discharges to Cowles Bog from confined aquifers that underlie the wetland. These flow systems are recharged in moraines south of the dune- beach complexes. Water from the confined aquifers discharges into the surficial aquifer mainly by upward leakage through a buried till sheet that serves as the confining layer. However, the till sheet is breached below a raised peat mound in Cowles Bog, allowing direct upward discharge from the confined aquifer into the surficial sand, marl, and peat. The shallow ground and wetland water in the area influenced by this leakage is a calcium magnesium bicarbonate type, with low tritium concentrations consistent with mixing of older ground water and more recent precipitation. Ground water and wetland water from surrounding areas are less mineralized and have higher tritium concentrations characteristic of precipitation in the late 1970s. The results of this study suggest that wetlands in complex hydrogeologic settings may be influenced by multiple ground-water flow systems that are affected by geomorphic features, stratigraphic discontinuities, and changes in sediment types. Discharge and recharge zones may both occur in the same wetland. Multidisciplinary studies incorporating hydrological, hydrochemical, geophysical, and sedimentological data are necessary to identify such complexities in wetland hydrology.
dc.subjectGreat Lakes
dc.subjectGroundwater
dc.subjectWetland
dc.subjectCowles Bog
dc.subjectLake Michigan
dc.titleInteractions Between Ground Water and Wetlands, Southern Shore of Lake Michigan, USA
dc.typearticle
dc.source.journaltitleJournal of Hydrology
dc.source.volume141
refterms.dateFOA2021-09-07T17:41:13Z
dc.description.institutionSUNY Brockport
dc.source.peerreviewedTRUE
dc.source.statuspublished
dc.description.publicationtitleEnvironmental Science and Ecology Faculty Publications
dc.contributor.organizationIndiana University - Bloomington
dc.contributor.organizationThe College at Brockport
dc.contributor.organizationU.S. Geological Survey
dc.languate.isoen_US


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