Sedimentation in Quincy Bay and Potential Remedial Measures

Adams, J. Rodger; Bhowmik, Nani G.; Bogner, William C.; Dillon, Frank S.

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Description

Title

Sedimentation in Quincy Bay and Potential Remedial Measures

Author(s)

• Adams, J. Rodger
• Bhowmik, Nani G.
• Bogner, William C.
• Dillon, Frank S.

Issue Date

1987

Keyword(s)

• Floods
• Mississippi River
• Quincy Bay
• rehabilitation
• sediment budgets
• sediment transport
• sedimentation
• suspended sediment

Abstract

A lake sedimentation survey determined that about 72% of the volume of Quincy Bay has been filled with sediment deposits. Remaining water depths range from 0.5 foot in Long Lake and Triangle Lake to 5.6 feet in the lower main bay. Measurements of water and sediment fluxes into the bay showed that tributaries contribute 1% of the water and 8% of the sediment, the access channel contributes 52% of the water and 22% of the sediment, and flood overflows from the Mississippi River contribute 47% of the water and 70% of the sediment The average annual sediment inflow is 1,096,000 tons, of which about 245,000 tons, or 22.4%, is deposited in the bay. A number of possible remedial measures, and comments on them from interested agencies and individuals, are presented and discussed in the report. Recommended actions include: 1) rehabilitation of Triangle Lake, 2) selective dredging for boating and fish habitat, 3) implementation of soil conservation practices on tributary watersheds, and 4) further analysis of closing the access channel and diverting all but the largest floods from most of the bay area.

Publisher

Illinois State Water Survey

Series/Report Name or Number

Report of Investigation (Illinois State Water Survey) RI-108

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/77883

Copyright and License Information

Copyright, University of Illinois Board of Trustees. All rights reserved. This document is a product of the Illinois State Water Survey, and has been selected and made available by the Illinois State Water Survey and the University Library, University of Illinois at Urbana-Champaign. It is intended for research and educational use, and proper attribution is requested.

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