Computer · Environmental Engineering
When sewage with pollutant concentration Cs flows at a discharge rate of Qs into a river stream having a background concentration Cr and discharge rate Qr, the resulting mixture concentration C is given by which expression?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1C = (CsQs + CrQr) / (QsQr + Cr)
- 2C = CsQs / (Qs + Qr)
- 3C = CsQs / (QsQr + CrQr)
- 4C = (CsQs + CrQr) / (Qs + Qr)✓
Correct answer
C = (CsQs + CrQr) / (Qs + Qr)
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