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Distance (miles) 30 60 90 120 150 180 210 240 DO sat 9.0 6.0 2.0 1 2 3 4 Time (days) DO (mg/L)

Distance (miles) 30 60 90 120 150 180 210 240 DO sat 9.0 6.0 2.0 1 2 3 4 Time (days) DO (mg/L)

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A wastewater treatment plant discharges its effluent into a river at time 0 days as shown in the figure below.
a) What is the initial DO deficit? Show your work.
b) What is the critical DO concentration and the critical time?
c) If the DO concentration of the river was at saturation before the effluent was discharged into it, and the DO concentration in the river after mixing is 8.0 mg/L as shown in the figure, what was the DO concentration of the wastewater treatment plant effluent. The flowrate of the river is 80 cfs downstream of the mixing point, and the flowrate of the effluent discharge

 

Distance (miles) 30 60 90 120 150 180 210 240 DO sat 9.0 6.0 2.0 1 2 3 4 Time (days) DO (mg/L)
Transcribed Image Text:Distance (miles) 30 60 90 120 150 180 210 240 DO sat 9.0 6.0 2.0 1 2 3 4 Time (days) DO (mg/L)
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