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MASS HOUSING
DESIGN STRATEGIES
ANDSTANDARDSS. D. Chawathe
Hon. Director (Technical)
Indian water Works Association
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SEWERAGE
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SEWAGE QUANTUM =80 % OF QUANTUM OF WATER SUPPLY
+ INFILTRATION
= APPROX. QUANTUM OF WATERSUPPLY
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MANNINGS FORMULA
Q=[1/n][3.118] [D**0.667] [ S** 0.5] [10 ** -6]
Q in lps, D in mm,
n is Mannings Coefficient of roughness
S is slope of sewer pipe
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MAKE-UP WATER REQUIREMENT=
Blow Down+ Windage+ EvaporationFor a typical 100 Ton A/C Plant
circulating 1100 Lit/min
Water
MAKE-UP WATER REQUIREMENT =20 + 2.2 + 22 = 44.2 Lit/min
=63400 Lit/day
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THANK YOU
