A large stream has a re-oxygenation constant of 0.4 per day. At a velocity of 0.90 m/s and at the point at which an organic pollutant is discharged, it is saturated with oxygen at 9.2 mg/L (D-0). Below the outfall, the ultimate demand for oxygen is found to be 20 mg/L and the de- oxygenation constant is 0.2 per day. What be the DO at 50 km downstream?

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A large stream has a re-oxygenation constant of 0.4 per
day. At a velocity of 0.90 m/s and at the point at which
an organic pollutant is discharged, it is saturated with
oxygen at 9.2 mg/L (D-0). Below the outfall, the ultimate
demand for oxygen is found to be 20 mg/L and the de-
oxygenation constant is 0.2 per day. What be the DO at
50 km downstream?
Transcribed Image Text:A large stream has a re-oxygenation constant of 0.4 per day. At a velocity of 0.90 m/s and at the point at which an organic pollutant is discharged, it is saturated with oxygen at 9.2 mg/L (D-0). Below the outfall, the ultimate demand for oxygen is found to be 20 mg/L and the de- oxygenation constant is 0.2 per day. What be the DO at 50 km downstream?
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