What is the force in Pounds/Square Foot of flowing water?

Question

In other words, if I had piece of material that is 1 foot by 1 foot, and I put it in a river flowing at 3 MPH so that it is perpendicular to the water flow, how many pounds of pressure would be on that square?
Thanks!

Answer 1

There's no simple formula for that. The turbulence coming off the square makes it very complicated to calculate. The pressure varies greatly on different parts of the square, so the size of the square changes changes the total pressure per square inch too.