CIVE 4179 HW2 solns

# CIVE 4179 HW2 solns - CIVE 4179 Homework#2 Solution...

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CIVE 4179 Homework #2 Solution Problem #1 1) As the mass of the pollutant (concentration) increase and weight of 1 Litre of solution > 10 6 mg then, the values of ppm and mg/L diverge. They are close at low concentrations. Problem #2 Total mass of : Molecular weight of N = 14 Molecular weight of O = 16 = 1(14)+3(16) = 62 10 mg N /L (62 mg /L)/(14 mg N /L) = 45 mg /L (TN includes nitrate; TKN does not include nitrate) Problem #3 Separate system is environmentally benign - SS does not generate CSO; - SS is more flexible; SS is easier to manage. Problem #4 First flush is the initial surface runoff of a rainstorm. During this phase, water pollution entering storm drains in areas with high proportions of impervious surfaces is typically more concentrated compared to the remainder of the storm. Consequently these high concentrations of urban runoff result in high levels of pollutants discharged from storm sewers to surface waters . Two scenarios:

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## This note was uploaded on 03/04/2012 for the course CIVE 4179 taught by Professor Williamelliot during the Spring '12 term at Colorado State.

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CIVE 4179 HW2 solns - CIVE 4179 Homework#2 Solution...

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