CIV E 445-APPLIED HYDROLOGY
FALL 2010
FINAL EXAM
MONDAY, MAY 17, 2009, 0800-1000
Name: ______________________ Red ID: __________________ 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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(20%) Route the following inflow hydrograph using the storage indication method.
| Time (hr) | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Inflow (m3/s) | 10 | 20 | 50 | 80 | 90 | 100 | 90 | 60 | 50 | 40 | 30 | 20 | 10 |
Assume baseflow is 10 m3/s and K = 4 hr.
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(20%) Given the following inflow hydrograph to a certain
stream channel reach, calculate the outflow by the Muskingum method.
| Time (hr) | 0 | 3 | 6 | 9 | 12 | 15 | 18 | 21 | 24 | 27 | 30 | 33 | 36 |
| Inflow (m3/s) | 100 | 120 | 150 | 200 | 250 | 275 | 250 | 210 | 180 | 150 | 120 | 110 | 100 |
Assume baseflow is 100 m3/s, K = 2.4 hr, and X = 0.1.
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(60%) Please answer each question in one clear-and-concise paragraph:
1. In reservoir routing, when the inflow and the outflow coincide, the outflow a maximum. Why?
2. In reservoir routing, there is no lag between the start of inflow and the start of outflow. Why?
3. What is McCarthy's contribution to hydrology?
4. What is Hayami's contribution to hydrology?
5. What is Cunge's contribution to hydrology?
6. Give three alternate definitions for flood wave celerity. Which one did Seddon develop?
7. What is the Courant number? Under what value of Courant number does the Muskingum-Cunge method work best? Why?
8. Which situation, mountain flow or valley flow, diffuses the flow more? Why? Explain using an equation.
9. Why does the time-area method overestimate the flood peak?
10. Why would you not use the method of cascade of linear reservoirs in an ungaged basin?
11. Why are worms important in hydrology?
12. Why are cowboys important in hydrology?
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