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ISWS Report of Investigation RI-79PDF

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Title:Water Quality Features of the Upper Illinois Waterway
Author(s):Butts, Thomas A.; Evans, Ralph L.; Lin, Shun Dar
Subject(s):Algae
bacteria
benthic organisms
coliforms
hydraulic-hydrologic models
modeling
nitrogen
oxygen demand
sediments
streams
water pollution control
water quality
water temperature
Abstract:The dissolved oxygen resources of the Upper Illinois Waterway are depressed because of a combination of oxygen demand sources including carbonaceous and nitrogenous BOD, benthic biological extraction, and sediments. Because of these demands, maintenance of 6.0 mg/l DO in the stream system is difficult, and achievement of a minimum DO requirement of 5.0 mg/1 requires the nitrogenous and carbonaceous demand be substantially reduced. Water quality data obtained from field surveys are summarized together with hydraulic and hydrologic data to determine wastewater treatment needs. Collection of the waterway algal types reveals that diatoms are the dominant group comprising about 85 percent of the total densities. However, algal concentrations do not impair use of the waterway for recreation. Fecal coliform bacteria densities decrease with downstream movement at a rate of 0.77 per day in the upper pools and 0.42 per day in the lower pools. About 9 percent of the total coliform bacteria population are fecal coliforms. Only 3 of 19 stations sampled met the bacterial quality standards required by the Illinois Pollution Control Board.
Issue Date:1975
Publisher:Illinois State Water Survey
Series/Report:Report of Investigation (Illinois State Water Survey) RI-079
Genre:Technical Report
Type:Text
Language:English
URI:http://hdl.handle.net/2142/77789
Publication Status:published
Peer Reviewed:peer reviewed
Rights 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.
Date Available in IDEALS:2015-05-28


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