Question

You have a beach house on the east coast of Florida. The main wave source is to the northeast. Your neighbor to the north of you is having problems with beach erosion and storm waves often come under his house. So he decides to build a groin and he tells you it is for the benefit of the neighborhood. What should you respond to his comment?

Answer 1

You respond by saying "A groin can be successful in stabilizing a beach on the updrift side, but erosion tends to be aggravated on the downdrift side, which is deprived by the groin structure of replenishment by drifting sand." Then suggest to your neighbor that to counteract this tendency, multiple groins should be built in so-called groin fields, to stabilize a larger beach area.