CIV E 530 - OPEN-CHANNEL HYDRAULICS

SPRING 2017 - MIDTERM 2 - SOLUTION

PROBLEM 3: ESSAY QUESTIONS

1.

    The brute force method is direct; Newton's iteration is iterative. Brute force method advances with the trial value; Newton's iteration uses the tangent, once the trial value is near the root.

2.

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

3.

    Between 20° and 40°.

4.

    Yes, because the permissible shear stress decreases, i.e., the water is hungry for sediment.
5.
    Reduce the water levels to allow the reservoir to contain the impending spring flood, by temporarily fixing the emergency and auxiliary spillways as best as can be done under the circumstances. Have evacuation orders in place as a last resort. Redesign and rebuilt the dam in view of climate change.
Problem 4

 
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