Civ E 331 Assignment #6-Solution(2015)

# Civ E 331 Assignment #6-Solution(2015) - CivE 331...

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CivE 331 Assignment #6 1. Classify the following flows as steady or unsteady, and uniform or nonuniform: (a) Water flowing through a logjam in a river with the observer standing on the shore. (b) Water flowing through a river rapids with the observer on a raft traveling with the current. (c) A flood wave traveling in a river which is generated by a gentle rainfall/runoff event, with the observer standing on the bank. (d) A moving hydraulic jump in a prismatic channel, with the observer running along-side the bank at the same speed as the jump. Solution: (a) Steady, nonuniform; (b) Unsteady, nonuniform; (c) Unsteady, nonuniform; (d) Steady, nonuniform.

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2. Determine the uniform depth y 0 , area A , and wetted perimeter P for the following conditions: (a) Trapezoidal channel, m 1 = 2.5, m 2 =3.5, b = 4.5 m, Q =35 m 3 /s, n = 0.015, S 0 = 0.00030 (b) Circular channel, d =2.0 m, Q = 4.25 m 3 /s, n = 0.012, S 0 = 0.001 (c) Rectangular channel, b = 7.5 m, Q = 35 m 3 /s, n = 0.020, S 0 = 0.0004 Solution: Chezy-Manning equation: ? = 1 ? 𝐴?
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