Approximate BOD Treatment Requirements for Urban Runoff

by Udai P. Singh, (A.M.ASCE), Engr.-Hydro.; CH2M Hill, Inc., Gainesville, Fla.,
Gregory L. Tate, (A.M.ASCE), Water Resources Engr.; CH2M Hill, Inc., Gainesville, Fla.,
Ronald L. Wycoff, (A.M.ASCE), Hydr. Engr. and Hydro.; CH2M Hill, Inc., Gainesville, Fla.,

Serial Information: Journal of the Environmental Engineering Division, 1979, Vol. 105, Issue 1, Pg. 3-11

Document Type: Journal Paper


The impact of storm-induced flows on receiving water dissolved oxygen levels is investigated for nine selected urban areas. Included are sites subject to combined sewer overflow as well as sites subject to storm-water runoff. The resulting DO sag curves are analyzed and BOD treatment requirements for the storm-induced BOD loading are identified for each study site. Treatment requirements are based on the criterion of maintaining a minimum DO residual in the receiving water of 5.0 mg/l. The identified treatment requirements together with pertinent site-specific wasteloading and receiving water characteristics are analyzed by regression techniques in order to develop a lumped areawide water quality index. This index can be used to estimate urban runoff BOD treatment requirements for locations with known wasteloading and hydrologic characteristics.

Subject Headings: Water quality | Urban areas | Runoff | Dissolved oxygen | Waste treatment | Regression analysis | Municipal water | Water flow

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