The unit hydrograph of a catchment is triangular in shape, having a time base of 20 hours and a peak discharge of 100 m3/sec. The area of the catchment is:

If 5 liters of water is removed from a standard US Weather Bureau Class A evaporation pan having a diameter of 2 m, and simultaneous rainfall measurement during the same period is 9 mm, calculate the net depth of evaporation.

If 5 litres of water is removed from a standard evaporation pan of diameter 2 m, and the simultaneous rainfall measurement is 9 mm, what is the net evaporation depth?