1.The quantity of water used by the community varies widely. Discuss some of the common factors affecting the water use.
2.Compare the relative contributions of a treated water supply and the collection, treatment and disposal of human wastes towards the control of epidemic diseases in developing countries. If there are insufficient resources for both systems, should one be given priority over the other? Explain
3.A flow of 4.8 m3/s is to be developed from a 500 km2 watershed. The reservoir is estimated to cover 1,700 ha. The annual rainfall is 97 cm, the annual runoff is 30 cm, and the annual evaporation is 120 cm. Find the net gain or loss in storage this represents. Calculate the volume of water evaporated in cubic meters.