a) Write down the various factors influencing infiltration. Explain i…
Previous year question for Hydrology and Irrigation Engineering.
Question
a) Write down the various factors influencing infiltration. Explain in detail.
10 Marks
b) Tabulated below are data for a number of storms observed on a river. Compute W index for all storms. What would be the average error and the average percentage error in estimated runoff, if the average W index was used to compute the runoff? If the computed infiltration exceeds the rainfall, take estimated runoff as zero.
Storms No. | Duration of rain in hours | Average rainfall in cm | Runoff in cm
---|---|---|---
1 | 12 | 2.82 | 1.32
2 | 48 | 2.98 | 1.02
3 | 24 | 4.55 | 2.46
4 | 72 | 14.22 | 7.42
5 | 18 | 2.87 | 0.43
6 | 24 | 3.91 | 0.48
7 | 36 | 8.10 | 1.93
8 | 12 | 4.40 | 1.67
9 | 30 | 5.31 | 1.98
10 | 18 | 6.98 | 3.15
Given the following hourly rainfall and runoff data for a watershed:
• Hourly Rainfall (mm): 15, 25, 20, 10, 5
• Corresponding Runoff (mm): 3, 9, 10, 4, 1
Create an S-curve hydrograph using the provided rainfall and runoff data.
10 Marks
- Year: 2022
- Subject: Hydrology and Irrigation Engineering