Irrigation Engineering
If A is the area of the surface, x̅ is the depth of its C.G. from the surface of the water and ω is the density of water, then

Total pressure on the surface is equal to ωx̅
Depth of the point at which total pressure acts is equal to its moment of inertia divided by Ax̅
All listed here
Depth of the centre of pressure is 2/3H vertically below the surface

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Irrigation Engineering
A counter berm is

A vertical benching provided on the inner edge of the bank
A horizontal benching provided on the outside slope
A horizontal benching provided on the inside slope
A vertical benching provided on the outer edge of the bank

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