Sediment Sources Analysis for Peoria Lake Along the Illinois River

by Nani G. Bhowmik,
William C. Bogner,
James A. Slowikowski,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


The modern-day lower Illinois River flows within a greatly oversized valley formed by an old course of the Mississippi River and glacial outwash events. As a result, the section of the Illinois from its mouth near Grafton to Henry, Illinois is characterized as a low-gradient, aggrading bed stream with large backwater areas. Sedimentation in the river threatens to convert the system from one of river/backwater areas to one of channel/marshes. The sediment budget of Peoria Lake, a major backwater lake along the river, includes input and output through the Illinois River and inputs from several small direct tributaries. Results after two-year monitoring of these small tributaries indicate that they are a significant factor in the sediment budget of Peoria Lake.

Subject Headings: Sediment | Lakes | Rivers and streams | Sediment transport | Backwater | Budgets | River flow | River and stream beds | Illinois | United States | Mississippi River

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