Publication Date


Document Type


First Advisor

Flemal, Ronald C.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Geology


Stream conservation--Illinois; Stream measurements--Illinois; Sediment transport--Illinois


Previous investigation has suggested that some Illinois streams are in disequilibrium. The purpose of this study is to determine how extensive this disequilibrium condition may be, and to reflect on the effects disequilibrium may have on the production of fluvial sediments. The principal tool employed in this study is a qualitative classification scheme which relates relative channel downcutting to the amount of bare-bank exposure in any reach of a stream. Five basins were surveyed to evaluate the percentages of stream reaches in each of the classification categories. Basin selection was made without a prior knowledge of the equilibrium/disequilibrium conditions prevailing in the basins. Approximate percentages of each general type were calculated from the 75 miles of stream surveyed. Results suggest that approximately 2/3 of the stream channels in northern Illinois are in marked disequilibrium. The data are also consistent with the hypothesis that sediment derived from disequilibrium stream channels is a significant fraction of the total fluvial load carried by streams of northern Illinois.


Includes bibliographical references.||Includes illustrations.


viii, 88 pages




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