Q2 on the Topic of Evaporation and Evapotranspiration
(a) Average rainfall during the month of January is found to be X mm. AClass A pan evaporation recorded an average of 8.12 mm/day near anirrigation reservoir. The average January inflow into the reservoiris 165 m3/s and the average irrigation demand during the month is170 m3/s. The water level drops by 0.25 m in that month and theaverage surface area of the reservoir is 21,000 ha. Estimate theseepage through the banks and the dam during this month. Assume thepan coefficient of 0.7 for the month of January.
(b)
Given the net radiation, Rn = 204 W/m2, Soil heat flux density, G = 0, Mean daily temperature = 210C, Humidity = X%, Wind velocity, u = 18 km/day, All values measured at 2 m.
Calculate potential ET using the Penman-Monteith method Take the value of as 0.065 kPa /oC.
