Question

The centre of pressure of wave pressure due to wave of height hw acting on a gravity dam will be at a height above the maximum still water level is

a.Hw/2

b.3 hw/8

c.Hw/3

d.2hw/3

Answer 1

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Answer 2

Answer:

b) 3 hw/8 is the correct answer.

Explanation:

Water Pressure is one of the major external forces operating on a dam of gravity. The horizontal water pressure released by the water stored on the upper side of the dam can be collected to disperse the hydrostatic pressure.

(i) The reservoir behind a dam is prone to the generation of waves produced by the shearing action of wind blowing over the surface resulting in wave pressure being exerted on the gravity dam.

Top of Dam

Wave height, pressure and center of action

(ii) The force and dimensions of waves depend mainly on the extent and dimensions of waves depend mainly on the extent and configuration of the surface area of the reservoir, the depth of the reservoir, and the velocity of the wind.

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