how can we design dia of rainwater pipes ? plez explain by using formula ?

how can we design dia of
rainwater pipes ? plez explain
by using formula ?

Question Posted / ravi p, b lore

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how can we design dia of rainwater pipes ? plez explain by using formula ?..

Answer / rafeez

Q= AXV
A = area in m2 T/4x d2
v = velocity m/s
q = discharge m3/s
we know about velocity of water and discharge of water
ex q =2 m3/s v= 1 m/s

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