A 600 ha watershed receives annual rainfall of 2, 500 mm. The average annual evapotranspiration f…

3. A 600 ha watershed receives annual rainfall of 2,500 mm. The average annual evapotranspiration from the watershed is 1,100 mm and 700 mm/yr infiltrates into the ground. and recharges a 5,000 sq. m. aquifer underlying the watershed. There is no other inflows or outflows into or out of the aquifer. There is a river flowing through the watershed with inflow rate of 5 m3/s which discharges into a reservoir at watershed outlet. The annual water storage in the reservoir increases by 2.5x106 m3. In a certain year, a farmer drills a well into the aquifer for irrigation purposes. a) If 40% of irrigation water goes to evapotranspiration and 15% infiltrates and recharges the aquifer, how much water does the farmer pump without depleting the storage of the aquifer? b) What is the annual flow of the river (m3ls) at the watershed outlet?

A 600 ha watershed receives annual rainfall of 2, 500 mm. The average annual evapotranspiration from the watershed is 1, 100 mm and 700 mm/yr infiltrates into the ground and recharges a 5,000 sq middot m. aquifer underlying the watershed. There is no other inflows or outflows into or out of the aquifer. There is a river flowing through the watershed with inflow rate of 5 m^3/s which discharges into a reservoir at watershed outlet. The annual water storage in the reservoir increases by 2.5 times 10^6 m^3. In a certain year, a farmer drills a well into the aquifer for irrigation purposes. a) If 40% of irrigation water goes to evapotranspiration and 15% infiltrates and recharges the aquifer, how much water does the farmer pump without depleting the storage of the aquifer? b) What is the annual flow of the river (m^3/s) at the watershed outlet?

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