Van der Meer formula

The Van der Meer formula is a formula for calculating the required stone weight for armourstone under the influence of (wind) waves.

Around 1985 it was found that the Hudson formula in use at that time had considerable limitations (only valid for permeable breakwaters and steep (storm) waves).

That is why the Dutch government agency Rijkswaterstaat commissioned Deltares to start research for a more complete formula.

This research, conducted by Jentsje van der Meer, resulted in the Van der Meer formula in 1988, as described in his dissertation.

Until now, there is no good method for determining P different than with accompanying pictures.