•  
  •  
 

Document Type

Research

Abstract

The Coralville Reservoir is a flood control impoundment located on the Iowa River just upstream from Iowa City. Since being placed in operation in 1958 its capacity at conservation pool level has been reduced nearly 20% by sedimentation. Studies of the reservoir's fishery have been conducted since 1961. Fish population surveys do not indicate a noticeable modification of the fish population due to siltation. A decrease in the total fish population, primarily sport fish, occurring early in 1965, was due to oxygen depletion caused by heavy farm land runoff. Limnological studies of the Iowa River and the reservoir have been in progress since 1964. These indicate that gradual increases in plankton populations and threshold odor values have occurred in the reservoir and the river below the impoundment. Studies of the biological productivity of the reservoir indicate that maximum production frequently accompanies increased water level and inundation of littoral areas. Thus, increasing reservoir conservation pool level to compensate for loss of capacity due to sedimentation could contribute to water quality problems due to eutrophication.

Publication Date

1969

Journal Title

Proceedings of the Iowa Academy of Science

Volume

76

Issue

1

First Page

173

Last Page

179

Copyright

© Copyright 1969 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

Share

COinS
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.