Name: ______________________ S.S. No. ________________ Grade: _______

1. Route the following inflow hydrograph through a linear reservoir 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, 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 1-h unit hydrograph for a catchment with the following time-area diagram:

   Time (hr)        0      1      2        3        4        5        6
   Area (km²/s)     12     20     42       66       30     16

   Use K= 2 hr, and Delta t= 1 hr.

4. (40%) Please answer each question in one clear-and-concise paragraph:
   a. What is a proportional or Sutro weir?
   b. In reservoir routing, why is there no lag between inflow and outflow?
   c. Why is it not possible to have X greater than 0.5 in Muskingum routing?
   d. What is the difference between Muskingum and Muskingum-Cunge methods?
   e. Why does the time-area method overestimate the flood peak?
   f. How does the modified Clark method differ from the Clark method?
   g. What two types of storms can cause floods?
   h. What is the importance of worms in hydrology?