Breakwaters

Breakwaters creates a zone of shallow water between itself and the coast, so that waves will break against it before reaching the coast. Thus reducing costal erosion.

Breakwaters are usually made of granite and are parallel to the coast. The cost of each breakwater is estimated to be around $1million. The disadvantage is they are unable to provide complete protection and leaves certain areas unprotected. The unprotected areas would face coastal erosion.

Breakwater

With breakwaters, the waves hit the breakwater before hitting the coast. Thus, reducing the speed and energy of the waves, causing less coastal erosion.

Without breakwaters, the waves hit the coast directly and cause more coastal erosion.