Hydraulics of Flow in the Kaskaskia River, Illinois

Bhowmik, Nani G.

Permalink

https://hdl.handle.net/2142/77801 Copy

Description

Title

Hydraulics of Flow in the Kaskaskia River, Illinois

Author(s)

Bhowmik, Nani G.

Issue Date

1979

Keyword(s)

• Bed materials
• circulation
• hydraulic properties
• hydraulics
• head loss
• Illinois
• Kaskaskia River
• low flow
• open channel flow
• pools
• riffles
• river flow
• roughness (hydraulic)

Abstract

The hydraulics of flow was investigated at two reaches in the Kaskaskia River. The discharge varied from 58 to 4000 cfs and the flow frequency varied from 5 to 88 percent. The head loss varied from 0.96 ft/ mile for high flows to 1.98 ft/mile for low flows. The vertical velocity distribution was found to follow a logarithmic distribution. A theoretical distribution predicted the lateral velocity distribution in the bends reasonably well. In all, 79 isovels were developed for all flow conditions. The average value of the energy coefficient was 1.45 for straight reaches and 1.43 for bends. Similarly, the average value of the momentum coefficient was 1.22 for straight reaches and 1.18 for bends. Manning’s roughness coefficient varied from 0.039 to 0.053. During low flows. the river flows through a series of pools and riffles. The median diameter of bed materials varied from 40 mm in the riffle to 0.04 mm in the pool, whereas the Froude number changed from 0.7 to 0.01. During high flows, the effect of the pool and riffle on the flow condition is minimal or nonexistent.

Publisher

Illinois State Water Survey

Series/Report Name or Number

Report of Investigation (Illinois State Water Survey) RI-091

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/77801

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.

Owning Collections