A cofferdam is design for a some return period. of it taken 5 years 10 complete the construction f main dam, what return period in the design of cotter dam would have reduced to sink 10%2

.3. Table below gives the necessary data about the crop, duty of water and the nder each crop commanded by a canal taking off from a storage reservoir. Taking a time factor for ared al to be (12/20), calculate the discharge required at the head of the canal. If the capacity factor is 08. determine the design discharge. Base period (days) Duty of water at the head of the canal Area Crop (hectares) (hectares/cumec) 900 580 320 Sugar cane 580 150 90 Overlap for sugar cane in hot weather 1 600 750 120 Wheat (Rabi) 2 000 600 120 600 Bajra (Kharif) 320 120 Vegetables (Hot weather)

Will the actual drawdown in the pumping well be more than the theoretical drawdown? If yes, why and what measures can you recommend for reducing the drawdown in the pumping well?

At a particular time, the storage in a reach of the Truckee River is 55.3 acre-ft. At that instant, the inflow into the reach is 375 cfs and the outflow is 563 cfs. After 2 hours, the inflow and outflow are 600 cfs and 675 cfs, respectively. (Hint: you will need to estimate the average inflow and outflow rates to complete the problem) • Determine the change in storage volume during the 2 hours. • Determine the stored volume after 2 hours.