A breakwater is generally constructed out of rocks or concrete, creating a wall, or even a submerged barrier that runs parallel to the shore. This barrier breaks the wave prior to its reaching the shore, dissipating the energy with which it meets the shore.

What is the purpose of breakwaters?

A breakwater is a structure constructed for the purpose of forming an artificial harbour with a basin so protected from the effect of waves as to provide safe berthing for fishing vessels.

How do breakwaters reduce coastal erosion?

Breakwaters are barriers built offshore to protect part of the shoreline. They act as a barrier to waves, preventing erosion and allowing the beach to grow. The dissipation of wave energy allows material carried by longshore currents to be deposited behind the breakwater. This protects the shore.