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Thursday, October 31, 2024

DNR Concerned Low Stream Flow Could Negatively Impact Aquatic Species Heading Into Winter

DNR Concerned Low Stream Flow Could Negatively Impact Aquatic Species Heading Into Winter

With Iowa facing drought conditions after record-low rainfall in September and October, concerns are growing about the impact of low stream flows on aquatic life as winter nears. Scott Grummer, a fisheries biologist with the Iowa Department of Natural Resources (DNR), warns that if the state experiences a harsh winter, fish in Iowa’s streams could be at risk. He says, “We were concerned about stream flows in northern Iowa a year ago, but the mild winter allowed us to sneak by – but some of these rivers, with their lack of current and depth, if we get a normal winter, we could have them freeze to the bottom. Undoubtedly, we are going into winter in low flow. If we have a harsh winter, fish survival may not be great.” Grummer adds that Clear Lake has dropped 20 inches since July, and the Winnebago River is at levels lower than last year, with similar reports throughout the state. While rain is forecast this week, Grummer emphasized the need for regular precipitation to increase stream flows before colder weather sets in fully.

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