Effect of Flow Conditions on Stream Reaeration Coefficients

by James L. Smoot, US Geological Survey, United States,

Document Type: Proceeding Paper

Part of: Environmental Engineering


Contrary to the findings of previous studies of channel-controlled stream reaches, it was found that, in four reaches of a small stream characterized by a series of pools and riffles, reaeration coefficients decrease with decreasing discharge. In the reach with the most pool-and-riffle development, the measured reaeration coefficient under low-flow conditions was 86 percent less than its value during average-flow conditions. A regression equation was developed which accurately predicted the measured values in the four study reaches. The equation appears to have applicability to other similar pool-and-riffle streams.

Subject Headings: Streamflow | Stream channels | Ecological restoration | Rivers and streams | Aeration | Water pollution | Regression analysis | Water quality

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