Identifying Groundwater Seeps in the Namekagon River in Wisconsin

National Park Service Great Lakes Inventory and Monitoring Network (GLKM) biologist Ted Gostomski uses a handheld thermal infrared sensor to identify cold groundwater seeps in the upper Namekagon River near Cable, Wisconsin.  Al Kirschbaum, a remote sensing specialist with the NPS-GLKM, documents Gostomski's findings from the canoe. The USGS New England Water Science Center collaborated with the National Park Service to collect thermal imagery along a ~12-mile reach of the upper Namekagon River.