The pressure against the dam wall increases at the lower levels than nearer the surface. So I expect the foot of the dam wall to be thicker at the bottom than at the top.
The pressure of the water against the top of the dam wall, is much less than the pressure exerted against the bottom of the dam wall. The width of a dam wall increases to compensate for the increased water pressures at the lower level.
Due to the that the pressure exerted by a liquid increase with its depth. Thus as depth increase, more and more pressure is exert by water on the wall of dam. A thick wall is required to withstand a great pressure, therefore, the wall of the dam is made with thickness increasing towards the base
The base of the dam is substantially thicker than the top. The extra thickness adds strength.
A wall that holds back water is a dike, levee or dam
The dam is the wall or structure that holds back fresh water. The reservoir is the whole structure, which includes the dam wall and stored water.
why are the walls of a dam thickened near the base
A Dam
This is because the pressure in a liquid increases with depth. This means that the pressure at the bottom of the dam is more. Hence it is more liable to break out from the dam as more pressure is exerted on the walls. So, the walls are thicker at the bottom.
A dam is way to control floods by putting a large wall across a river
It is known as a dam or dam wall. Another structure would be a dike or a levee.
a dam
Dam!