In march of 1996 a special release of water, Q=1270 m 3 /s, was made from the Glenn Canyon Dam, to create an artificial flood in the Grand Canyon.

In march of 1996 a special release of water, Q=1270 m3/s, was made from the Glenn Canyon Dam, to create an artificial flood in the Grand Canyon. 

a) the flow was through 8 pipes, each with internal diameter of 2.5m. Estimate the velocity through those pipes

b) Estimate the average velocity of the river at some point downstream of the dam, where the width of the river was 61m and its average depth was 3m.