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Into a stream, with no trace of salt initially, a salt with a concentration of 20 mg/cc is introduced at a constant rate of 2...

Into a stream, with no trace of salt initially, a salt with a concentration of 20 mg/cc is introduced at a constant rate of 2 litres per minute. The samples collected at a downstream section sufficiently far away indicated an equilibrium salt concentration of 0.05 ppm. Determine the discharge in the stream from this data.

Answers

Jim
From the given data, we have
C0 = 0
C1 = 20mg/c.c. = 20/1000 = 0.02
C2 = 0.05 ppm = 0.05/106 = 5 x 10-8
q = 2 litres/minute = (2 x 10-3)/60
= 3.33 x 10-5 m3/s
From, Q = q(C1/C2 – 1)
= 3.33 x 10-5 [(0.02/5 x 10-8) – 1]
= 13.33 m3/s
jim items answered the question on April 9, 2018 at 18:29

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