- (25%) A high overflow spillway has a downstream slope of 0.6 H to 1 V. The friction factor of smooth concrete (1/8 of Darcy-Weisbach) is f = 0.0038.
What is the prevailing Froude number?
- (25%)
On July 31, 1976, the Big Thompson river, near Loveland, Colorado, experienced a record flood event.
Provide a quick estimate of the flow depth (m) and velocity (m/s).
Assume critical flow and q = 50 m2/s.
- (25%) The overflow spillway at Turner reservoir, in San Diego County, is 8 ft wide. On February 24, 2005,
after several days of heavy rain, the head over the spillway was 4 in. What is your best estimate of the discharge?
- (25%) Please answer the following questions in a brief statement.
- Why is unsteady uniform flow not possible in practice?
- What is the difference between energy and momentum?
- What width/depth ratio will assure hydraulically wide conditions in an open channel?
- Why is it improper to refer to Manning's n as a constant?
- Why is β the exponent of the discharge-area rating, important in open-channel flow?
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