Diversion of Wastewaters from Madison Lakes

by William C. Sonzogni, Grad. Student, Water Chemistry; Univ. of Wisconsin, Madison, WI,
G. Fred Lee, Prof. of Civ. Engrg.; Texas A & M Univ., College Station, TX,

Serial Information: Journal of the Environmental Engineering Division, 1974, Vol. 100, Issue 1, Pg. 153-170

Document Type: Journal Paper


In general, an improvement in water quality of the Madison, Wisconsin, lakes resulted after sewage effluent was diverted from them. This was evidenced by a reduction in the phosphorus content of the lakes as well as a decrease in the frequency and severity of blue-green algal blooms. Based on the limited data available, the rate of response of two relatively small and shallow Madison lakes, Lake Waubesa and Lake Kegonsa, following a reduced phosphorus influx (the result of a major sewage diversion in 1958) was found to be similar to that predicted from a simple, exponential decay model based on the hydraulic residence time. It is predicted based on a phosphorus residence time that a new equilibrium phosphorus content will be reached in Lake Mendota in about 1975, or about three years following the reduction in the phosphorus resulting from the wastewater diversion.

Subject Headings: Phosphorus | Wastewater management | Lakes | Water quality | Sewage | Hydraulic models | Residence time | Effluents | Wisconsin | United States

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