A watershed of 37 km2 was subjected to a storm of 2-h duration from which the following information are recorded in Table Q3. a) Obtain a Unit Hydrograph for this watershed knowing that the base flow in the stream is estimated at 2 m3 /s. [10] b) Derive and plot 6-h Unit Hydrograph for the catchment area.           Time (hours) 0 1 2 3 4 5 6 7 8    Discharge (m3 /s)      2 15 30 37 30 22 16 12 2

Structural Analysis
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   A watershed of 37 km2 was subjected to a storm of 2-h duration from which the following information are recorded in Table Q3. a) Obtain a Unit Hydrograph for this watershed knowing that the base flow in the stream is estimated at 2 m3 /s. [10] b) Derive and plot 6-h Unit Hydrograph for the catchment area.          

Time (hours)

0

1

2

3

4

5

6

7

8

   Discharge (m3 /s)   

 

2

15

30

37

30

22

16

12

2

 

 

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