1.Evaporation rate in a 3650 acre-lake is 100 acre-ft/d. If inflow to the lake is 25.2 cfs, determine the change in storage (ft) during 365 days.
2.A flow of 90 cfs is carried in a rectangular channel 10ft wide at a depth of 1.6 ft. If the channel is made of smooth concrete (n=0.016), find the slope necessary to sustain a uniform flow at this depth. What roughness coefficient would be required to produce uniform critical flow for the given rate of discharge on the slope.
3.It rains an average rate of 0.4 in/hr in a 600 acre watershed for 3 days. Determine:
a) average rainfall rate in cfs
b) rainfall volume for the 3 days in acre-ft c) rainfall volume in inches.