Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 14 (Q.No. 27)
27.
A 4-hour rainfall in a catchment of 250 km2 produces rainfall depths of 6.2 cm and 5.0 cm in successive 2-hour unit periods. Assuming the φ index of the soil to be 1.2 cm/hour, the run-off volume in ha-m will be
Discussion:
3 comments Page 1 of 1.
Sekhar samal said:
10 years ago
I want this solution.
Manju said:
10 years ago
Runoff depth = (6.2-1.2x2) + (5-1.2x2).
= 3.8 + 2.6 = 6.4 cm.
Runoff volume = 6.4x10^-2x250x10^6x10^-4 ha-m.
= 1600 ha-m.
= 3.8 + 2.6 = 6.4 cm.
Runoff volume = 6.4x10^-2x250x10^6x10^-4 ha-m.
= 1600 ha-m.
Apcivilian said:
3 years ago
π index = P-Q/t.
From here, Q (Depth of runoff) can be find out, then multiply with area you will find volume.
From here, Q (Depth of runoff) can be find out, then multiply with area you will find volume.
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