CIV E 445-APPLIED HYDROLOGY
FALL 2006
FINAL EXAM
MONDAY, MAY 15, 2006, 0800-1000

Name: ______________________ Red ID: __________________ Grade: _______

Instructions: Closed book, closed notes. Use engineering paper. When you are finished, staple your work in sequence (1 to 4), and return this sheet with your work.

(20%) Route the following inflow hydrograph through a linear-reservoir.

Time (hr) 0 1 2 3 4 5 6 7 8 9 10

Inflow (m³/s) 0 10 20 30 40 50 40 30 20 10 0

Assume baseflow is 0 m³/s, K= 3 hr, Delta t= 1 hr.
(20%) Given the following inflow hydrograph to a certain stream channel reach, calculate the outflow by the Muskingum method.

Time (hr) 0 1 2 3 4 5 6 7 8 9 10 11 12

Inflow (m³/s) 10 20 40 80 120 150 120 60 50 40 30 20 10

Assume baseflow is 10 m³/s, K= 1 hr, X= 0.2, and Delta t= 1 hr.
(20%) Use the Clark method to derive a 3-hr unit hydrograph for a catchment with the following time-area diagram:

Time (hr) 0 3 6 9 12

Area (km²) 57 72 39 15

Use K= 3 hr, and Delta t= 3 hr.
(40%) Please answer each question in one clear-and-concise paragraph:
1. In reservoir routing, when the inflow and the outflow coincide, the outflow is a maximum. Why?
2. What is the theoretical value of the discharge coefficient thorough a weir, based on critical flow? In U.S. customary units? In SI units?
3. What is McCarthy's contribution to hydrology? Explain.
4. What is Seddon's contribution to hydrology? Explain.
5. What is Hayami's contribution to hydrology? Explain.
6. What is Cunge's contribution to hydrology? Explain.
7. What is Clark's contribution to hydrology? Explain.
8. Why does the time-area method overestimate the flood peak?