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
16
22
1600
2200
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
3 comments Page 1 of 1.

Apcivilian said:   2 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.

Manju said:   9 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.

Sekhar samal said:   9 years ago
I want this solution.

Post your comments here:

Your comments will be displayed after verification.