The mass curve of rainfall for duration of 100 minutes from a self-recording rain gauge is given below.
|
Time from start of rain (minute) |
Cumulative rainfall (mm) |
|
0 |
0 |
|
20 |
5 |
|
40 |
12 |
|
60 |
26 |
|
80 |
32 |
|
100 |
35 |
Estimate the maximum intensity of rainfall for 20 minute duration of the storm.
1
18 mm/h
2
42 mm/h
3
21 mm/h
4
52 mm/h