Summary of water quality characteristics Navigation Pool 8 Schellhaass, S. M., and G. L. Benjamin. 1990. Summary of water quality characteristics at selected habitat sites - Navigation Pool 8 of the Mississippi River, July 17 through October 31, 1988. 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, August 1990. EMTC 90-01. 19 pp. (NTIS # PB90-267394) ABSTRACT The Wisconsin Resource Trend Analysis station was established in July 1988. Training was provided in water quality techniques based on the Procedures Manual for the Long Term Resource Monitoring Program. The Station was equipped with sampling instruments and water quality sampling began by the third week in July, from the navigable section of Pool 8 of the Mississippi River. Weekly trends were similar in all habitats types throughout the sampling period, July 17 to October 31, 1988. Dissolved oxygen average levels showed an increase at all habitats during the sampling period. Water clarity increased through the sampling period with a decrease in average turbidity and an increase in average secchi depth transparencies recorded in all habitats. Velocities were variable, fluctuating with the flow at the lock and dam. KEYWORDS water quality, trends, habitats, Mississippi River, Pool 8