Waste Water Engineering
If q is the average sewage flow from a city of population P, the maximum sewage flow

Q = [(18 + )/(4 + )] q
Q = [(18 + P)/(4 + )] q
Q = [(4 + )/(18 + )] q
Q = [(5 + )/((15 + )] q

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Waste Water Engineering
The sewer pipes

Should resist the wear and tear caused due to abrasion
Are designed for generating self-cleansing velocities at different discharge
All listed here
Carry sewage as gravity conduits

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