एक जलभराव क्षेत्र (catchment) का इकाई जललेख (unit hydrograph) त्रिकोणीय आकार का है, जिसका समय आधार (time base) 20 घंटे है और शिखर निर्वहन (peak discharge) 100 m3/sec है। जलभराव क्षेत्र का क्षेत्रफल है:

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?