Being a recreational fisherman, I have the following question. How much water would flow (gal per second) into a boat, if it had a 1" square hole in the bottom and the bottom is 18" under water? What I'm trying to do is to size bilge pump capacity. Could you provide the formula and constants that determine the results. Thank you in advance.

For small appertures :

Volume flow rate = Cd x A x sqrt(2 x g x H)

Cd : discharge co-eff (about 0.6 for water through a sharp edged hole)

A : hole area g : 9.8 ms-2 H : height of water

Rich, thanks for responding. I have question about the constant "g", what is it, what are the units? Thanks

Gus P

g is gravitational acceleration = 9.8 meters per secondsquared