A river traveling at a velocity of 10 kmday has a, Civil Engineering

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A river traveling at a velocity of 10 kmday has a

A river traveling at a velocity of 10 km/day has a dissolved-oxygen content of 5 mg/L and an ultimate CBOD of 25 mg/L at distance x = 0 km. that is, immediately downstream of a waste discharge. The waste has a CBOD decay coefficient, k₁ of 0.2 day^-1. The stream has a reaeration rate coef-ficient, k₂ of 0.4 day^-1. and a saturation di:mind-oxygen concentration of 9 mg/L.

(a) What is the initial dissolved-oxygen deficit?

(b) What is the location of the critical point, in time and distance?

(d) What is the dissolved-oxygen con-centration at the critical point?

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Civil Engineering: A river traveling at a velocity of 10 kmday has a

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Civil Engineering: A river traveling at a velocity of 10 kmday has a

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