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Son-in-law question

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Skogsgurra

Electrical
Mar 31, 2003
11,815
My son in law is building a little "shed" for truck and lorry repairs. There is a quite large area for parking these big trucks and it accumulates water when it rains. The authorities say that he is allowed to let 3 litres/second into the sewer when it rains heavily. He is going to build a reservoir where rainwater can accumulate and then make a hole in it some 500 mm down. He now asks ME(!) what diameter that hole shall have to guarantee that water flow at maximum head shall not be more than 3 l/s.

Help! I can't tell him I don't know. So I think I should cheat and get help from the Pub.

Anyone?

Gunnar Englund
--------------------------------------
Half full - Half empty? I don't mind. It's what in it that counts.
 
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