CIV E 530- OPEN CHANNEL HYDRAULICS
SPRING 2005
FIRST MIDTERM
FEBRUARY 28, 2005, 1600-1715
Name: ______________________ S.S. No. _____________ Grade: _______
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Instructions: Closed book, closed notes. Use engineering paper.
When you are finished, staple your work in sequence (1 to 3),
and return this sheet with your work.
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- (25%) Calculate the critical depth for a rectangular channel where Q = 5 m3/s, and b = 5 m.
- Given the following data measured in a cross section in an open channel,
calculate the velocity distribution coefficients α and β.
Element | Flow velocity (m/s) | Incremental
flow area (m2) |
1 | 2.5 | 11. |
2 | 2.2 | 16. |
3 | 1.7 | 18. |
4 | 1.3 | 23. |
5 | 0.9 | 20. |
6 | 0.6 | 11. |
- (50%) Please answer the following questions in a brief statement.
- What is the Vedernikov number?
- When is it necessary to use unsteady flow as opposed to steady flow when calculating floods?
- Is HEC-RAS 3.0 steady or unsteady?
- What is the main difference between a kinematic shock and a tidal bore?
- What is the maximum value of Froude number that can be achieved in practice?
- Why is the design of a spillway performed with empirical formulas?
- What are the four forces present in open-channel hydraulics?
- What is the exponent of the rating for turbulent Manning friction in hydraulically wide channels?
- What is a control in open-channel hydraulics? How many types of control are there? What are there?
- What is the minimum value of Manning's n that can be achieved in practice?
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