Reaeration in open-channel flow
Reaeration, the physical absorption of oxygen from the atmosphere, is the primary process by which a stream replaces oxygen consumed in the biodegradation of organic wastes. The reaeration process in a stream is characterized by its surface reaeration coefficient. Hence, knowledge of the reaeration coefficient permits determination of the quantity of waste that can be discharged into a stream without seriously depleting the dissolved oxygen content of the stream. The three basic methods for measuring the reaeration coefficient are the dissolved oxygen balance, disturbed equilibrium, and tracer ...
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