Name: ______________________ Red ID: __________________ Grade: _______

1. (20%) Route the following inflow hydrograph using the linear-reservoir 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, K= 4 hr, Delta t= 1 hr.

2. (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, X= 0.1, and Delta t= 3 hr.

3. (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.

4. (40%) Please answer each question in one clear-and-concise paragraph:
   

   1. According to McPhee, the Mississippi river is in danger of changing course? Why? Explain.
   2. What is the range of variability of the correlation coefficient?
   3. In reservoir routing, when the inflow and the outflow coincide, the outflow is a maximum. Why?
   4. What is McCarthy's contribution to hydrology? What is Seddon's contribution to hydrology?
   5. Explain the difference in rating curves between kinematic, diffusion, and dynamic wave models. In what circumstances is the dynamic wave model most applicable?
   6. What is the advantage of the Clark unit hydrograph over other unit hydrographs?
   7. Why does the time-area method overestimate the flood peak?
   8. Why are worms important in hydrology?