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|Title:||Environmental inventory and assessment of navigation pools 24, 25, and 26, upper Mississippi and lower Illinois Rivers : an aquatic analysis|
|Authors:||United States. Army. Corps of Engineers. St. Louis District.|
Colbert, Billy K.
Scott, Jerry E.
Johnson, Jeffrey H.
Solomon, R. Charles.
|Publisher:||Environmental Effects Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical report (U.S. Army Engineer Waterways Experiment Station) ; Y-75-2.|
Abstract: The purpose of this report was to establish a data base for the physical, chemical, and biological components of the aquatic system in Pools 24, 25, and 26 on the Upper Mississippi and Lower Illinois Rivers. Five other reports were prepared for the St. Louis District describing other environmental components. Four major habitats were sampled consisting of 70 sites at 19 transects: 119 sites at 13 transects on the Upper Mississippi River and 21 sites at 6 transects on the Lower Illinois River. Habitats sampled were the main channel, side channel, river border areas, and areas downstream of dikes. Water and sediment samples were collected for physical and chemical characterization. In situ measurements were made for dissolved oxygen, temperature, total alkalinity, pH, turbidity units, and settleable solids. Laboratory analyses were made of water and sediment samples for chemical oxygen demand, phenols, heavy metals, selected nutrients, and chlorinated hydrocarbons. Benthic organisms, drift organisms, phytoplankton, and zooplankton were collected during both sampling periods. Fish were only collected from the Illinois River. The data collected were subjected to various statistical analyses to test for differences between dates and among habitats and between rivers. The environmental impacts of operation and maintenance activities on the aquatic system are discussed and recommendations for additional studies are presented.
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