U.S. Geological Survey Open-File Report 98-579
Lansing, Michigan 1998
Estimates of the average ground-water component of streamflow for 195 streams in the United States part of the Great Lakes Basin range from 25 to 97 percent. Among the selected streams, the average ground-water component of streamflow was 67.3 percent. Estimates of the ground-water component of streamflow are based on hydrograph separation of 5,735 years of daily streamflow data. Incorporation of these estimates into the basin water supply for the Great Lakes shows that indirect discharge of ground water to the Great Lakes ranges from 22 percent of the basin water supply of Lake Erie to 42 percent of the basin water supply for Lake Ontario.
An electronic version of the paper can be obtained in pdf format at the URL listed below:
http://mi.water.usgs.gov/pdf/glpf.pdf (About 738K)
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Dave Holtschlag, U.S. Geological Survey, 6520 Mercantile Way, Suite 5, Lansing, MI 48911, firstname.lastname@example.org
Jim Nicholas, U.S. Geological Survey, 6520 Mercantile Way, Suite 5, Lansing, MI 48911, email@example.com
This study was done in cooperation with the Great Lakes Protection Fund
Holtschlag, D.J., and Nicholas, J.R., 1998, Indirect ground-water discharge to the Great Lakes: U.S. Geological Survey Open-File Report 98-579, 25 p.
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