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A summary of water quality characteristics at selected habitat sites in Navigation Pool 8 of the Mississippi River for 1 January-30 December 1989


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Five habitats were required to be sampled under the LTRMP: Channel Border Unstructured (CB-U), Channel Border - Wing Dam (CB-W), Backwater Contiguous (BW-C), Backwater Isolated (BW-I), and Impoundment (IMP). Similar weekly trends were seen in all five habitats during the year. Water clarity as indicated by nephelometric turbidity and Secchi disk depth transparency decreased from winter to summer, then increased during late summer and autumn. Dissolved oxygen (DO) showed similar trends in all habitats, as did temperature. A period of severe thunderstorms during the end of May produced sufficient runoff to increase flows in the river. All habitats experienced a very noticeable decrease in DO levels and a slight increase in average weekly [...]



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  • Upper Midwest Environmental Sciences Center (UMESC)



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Report by the Wisconsin Department of Natural Resources, La Crosse, Wisconsin, for the U.S. Fish and Wildlife Service, Environmental Management Technical Center, Onalaska, Wisconsin

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