A stratified confined aquifer has a top layer of 2 m thickness, a middle layer of 4 m thickness, and a bottom layer of 3 m thickness. If their permeabilities are 6, 16, and 24 m/day respectively, the effective vertical permeability in m/day will be approximately:

What will be the value of Chezy's constant 'C' if the velocity of flow 'V' is 1.506 m/s, bed slope is 1 in 2000 and hydraulic mean depth 'm' is 1.5 m?

Water is flowing through a rectangular channel. The width and depth of the channel are 830 cm and 140 cm, respectively. If the discharge through the channel is 600 cusecs, then the specific energy of flowing water and the value of minimum specific energy are ______ and ______, respectively.