I've already began studying for the October '09 exam (Civil, Water Resources).
I spent about three hours today trying to solve the attached problem, to no avail. Can someone please give me some insight as to how to determine the total discharge "Q" at outlet elevation 120.0 feet? Once I know that, the rest of the problem is easy.
I tried to use Bernoulli's principle but I cannot get it to work out. Working backwards from the correct answer of r=1.80 it appears that the discharge into the semicircular flume should be about 60 CFS, whereas I came up with about 69.7 CFS.
I spent about three hours today trying to solve the attached problem, to no avail. Can someone please give me some insight as to how to determine the total discharge "Q" at outlet elevation 120.0 feet? Once I know that, the rest of the problem is easy.
I tried to use Bernoulli's principle but I cannot get it to work out. Working backwards from the correct answer of r=1.80 it appears that the discharge into the semicircular flume should be about 60 CFS, whereas I came up with about 69.7 CFS.