Permeable Pile Groins

Abstract

Permeable pile groins have been built on the southern shores of the Baltic Sea in large numbers for the past century and a half, yet no detailed literature has been written on how these structures function. The study of the groin system at Warnemiinde, has shown that this type of groin causes a reduction of the littoral current and elimination of the local rip currents. This, in turn, causes underwater profiles to raise, a widening of the beach and a seaward movement of the shoreline.