1 2 Assume you are dealing with a vertical walled reservoir having a surface area of 500 000 m and that an inflow of 1 0 m s occurs How many hours will it take to raise the reservoir level by 30 cm 1 3 The storage existing in a river reach at a given time is 13 acre ft and at the same time the inflow to the reach is 450 cfs and the outflow is 500 cfs One hour later the inflow is 500 cfs and the outflow is 530 cfs Calculate the change in storage during the hour in cubic meters and acre feet