6.The uplift pressure on a dam can be controlled by i) constructing cutoff under upstream face ii) constructing drainage channels bet-ween the dam and its foundation iii) by pressure grouting in foundation The corret answer is

7.For a flood control reservoir, the effective storage is equal to

8.The useful storage is the volume of water stored in the reservoir between

9.The relation between probability (P) and recurrence interval (T) is given by

10.Trap efficiency of a reservoir is a function of