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In March 1988 the Long Term Resource Monitoring Program requested that scopes of work be developed for three problems: sedimentation, navigation effects, and water level fluctuations. After consultations with two prominent plant ecologists, Dr. John Barko, U.S. Army Corps of Engineers Environmental Laboratory, and Dr. John Titus, Southern University of New York, a scope of work was prepared outlining a study to determine concentrations of suspended solids limiting aquatic plant growth on the Upper Mississippi River. All work tasks were then prioritized by the Long Term Resource Monitoring Program's Problem Solving Work Group. This scope of work was recommended for funding, however, the timeframe for initiation of...
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This report summarizes monitoring activities of the Long Term Resource Monitoring Program (LTRMP) during 1999 and highlights selected results and accomplishments pertaining to hydrology, water quality, fish, macroinvertebrates, and vegetation. Mean discharge in 1999 was above average in the Upper Mississippi and Illinois Rivers, but spring flooding was relatively minor. Total nitrogen concentration has declined in the upper reaches of the LTRMP study area (Pools 4 and 8) from highs of about 4 mg/L in 1993 to present levels of about 1.5 mg/L. Mass balance budgets indicate that little nitrogen is lost (denitrified) as water moves through the LTRMP study pools on the Mississippi River. La Grange Pool on the Illinois...
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