CIV E 530 - OPEN-CHANNEL HYDRAULICS

SPRING 2008 - MIDTERM 2 - SOLUTION

PROBLEM 3: ESSAY QUESTIONS

1.

    Manning was an Irishman who developed the Manning equation for the velocity of uniform flow. He plotted seven formulas from different people, and drew a line in the middle, resulting in the velocity being a function of hydraulic radius to the 2/3 power, instead of 1/2 power, as Chezy had postulated.

2.

    A water is "hungry" when it has less sediment that it can transport. Therefore, it has the tendency to entrain sediment until it reaches an equilibrium or steady load.

3.

    12 types; the profiles C1 and C3 are completely horizontal.

4.

    So (gravity), Sc (friction), and Froude number (hydraulics).

5.

    So, Sc, 0, +∞ and -∞.

Problem 4

 
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