Open Introduction Section Open Fluvial Erosion Section Open Shoreline Erosion Section Open Anthropogenic Effects Open Mitigation Measures Open Conclusions Section

Mitigation Measures

Figure 33 : Breakwalls
Breakwalls are built parallel to the shoreline and absorb some energy from the waves. They are usually built in front of shoreline to allow it still to be navigatable such as marinas.

Figure 34 : Groins / Groynes
Groynes are built perpendicular to the shoreline to slow down longshore transport of sediment. It is an effective technique and is often used to provide sediment to beaches.

Figure 35 : Jetties
Jetties are usually placed at the entry point of a harbor. Their main purpose is to reduce the amount of dredging required at the entrance of a harbor. Dredging is still required, but is required less often. They usually result in deposition of sediment on the upcurrent side, and starve the downcurrent side of sediment.

Figure 36 : Scarborough Bluffs Protection
Here is an example of a multiuse structure. This structure was infilled with sediment, and is built in a way to deflect longshore currents towards the centre of the lake, and away from the tall Scarborough Bluffs. A bike path can be seen along the fingers of the structure, and is enjoyed by many, and gives a good view. Within the centre of the structure is a stormwater retention pond, that delay the polluted storm water from entering the lake immediately, allowing for some of the nastier sediments to be remediated by natural processes.