The recorded annual rainfall from 5 rain gauge stations in a catchment and the corresponding Theisen polygon area are given as follows –
|
Area (cm2) |
P(cm) |
|
25 |
125 |
|
30 |
175 |
|
30 |
275 |
|
10 |
275 |
|
5 |
325 |
If the scale of the Map is 1 : 5000, the volume of rainfall is –
1
500000 m3
2
525000 m3
3
600000 m3
4
625000 m3