How is Breakwater Effectiveness ?? 

-Fixed breakwater- 

Fixed breakwaters usually consist of mounded rubble or concrete barriers. These types of breakwaters offer protection from high and fast-moving waves and can still offer protection even if mildly damaged in heavy storms. Stone or rubble that is dislocated by heavy waves can be easily repaired without having to replace the entire structure. Some aquatic creatures use breakwaters as a habitat, and fixed breakwaters that are placed with open segments allow free movement of aquatic wildlife.

-Floating Breakwater- 

Floating breakwaters are moored, box-like or pontoon-like structures placed out from the shoreline to break up wave intensity. Floating breakwaters are effective in wave heights of less than 6.5 feet. They are appropriate for use in areas where poor soil conditions make a fixed breakwater unfeasible and are less expensive to install than fixed breakwaters.Floating breakwaters do not interfere with water flow, fish migration or the movement of sediment and can be easily moved or rearranged. Floating breakwaters are also often more aesthetically pleasing than fixed breakwaters.

-Summary of Effectiveness-

In conclusion, both breakwaters can last 15-30 years and creates a zone of shallow water between itself and the coast,waves will break against the breakwater before reaching the coast.