What Do We Know About Natural Purification?

by Ralph W. Purdy,

Serial Information: Journal of the Sanitary Engineering Division, 1968, Vol. 94, Issue 1, Pg. 1-12

Document Type: Journal Paper


It is possible to predict the effect of stabilization of oxidizable substances on the DO content of a stream. Time of flow can be calculated on the basis of displacement of occupied channel volume but calculations should be checked by observing time of passage with a fluorescent dye. The effect of sludge deposits, biological extraction and accumulation, and oxidation of nitrogenous substances on the DO balance in a stream can be evaluated and examples of such evaluations are presented.

Subject Headings: River bank stabilization | Flow duration | Channel flow | Streamflow | Displacement (mechanics) | Dyes | Sludge | Biological processes

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