The Physical Chemical and Biological Characteristics of the Chariton River prior to Impoundment of Rathbun Reservoir, April 1969

(1969) The Physical Chemical and Biological Characteristics of the Chariton River prior to Impoundment of Rathbun Reservoir, April 1969. Natural Resources, Department of

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Abstract

The Biology Section has been actively engaged in fisheries research in river areas where impoundment of the stream will ultimately occur. One flood control reservoir is already operational on the Iowa River in this state. Two additional reservoirs, Red Rock on the Des Moines River and Rathbun Reservoir, are in the final stages of construction and will become operational in 1969. Another is under construction on the Des Moines River near Saylorville with a projected closure date in 1973. Several other impoundments are in the planning stages by the Corps of Army Engineers. These storage reservoirs will have a profound influence upon the physical, chemical and biological characteristics of the stream they control. Pre-impoundment studies are the foundation for the determination of what changes occur and how they influence the river community. Investigations such as this one are difficult to document and report because of their scope. It is impossible to present data of this magnitude in another form because of the interrelationship between all of the characteristics. Presentation of one part of this study without inclusion of other important segments would spoil the continuity of the research and reduce the value of having the results under a single cover.