CIVE 445 - ENGINEERING HYDROLOGY

SPRING 2009 - MIDTERM 1 - SOLUTION

PROBLEM 1

A = 195 km2

P = 700 mm/yr

Q = 2.5 m3/s

Total volume of precipitation VP:

VP = 195 km2 × 700 mm/y × (1000 m/km)2 / (1000 mm/m) = 136,500,000 m3/y

Total volume of runoff VR:

VR = 2.5 m3/s × 86400 s/d × 365 d/y = 78,840,000 m3/y

Abstracted percentage:

[(VP - VR) / VP] × 100 = 42.24%   ANSWER.

Problem 2

 
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