Irrigation Engineering
When surface of transpiration is submerged under water, then potential evapotranspiration is

much more than evapotranspiration
much less than evapotranspiration
equal to or less than evapotranspi-ration
equal to evapotranspiration

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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

All listed here
Depth of the centre of pressure is 2/3H vertically below the surface
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

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