Coastal Defense: Stabilization techniques
|Hard Stabilization||Soft Stabilization|
Any of the following three stabilization techniques (viz. Hard Stabilization, Soft Stabilization, and relocation of threatened structures) can be adopted (based on the choice of strategy) for protection against coastline erosion and shoreline property damage: .
commonly involves the construction of structures like seawalls, breakwaters, revetments, and gabions. Generally these structures are designed to absorb some or all of the impact of waves crashing along the shoreline.
This is done either at the edge of the actual beach or further out in the water to break up the incoming waves before they reach the shore.
generally consist of depositing sand from elsewhere to supplement an eroding beach.
This process adds to the size of the physical beach and provides a greater buffer for shoreline structures. Usually the sand is gathered from other offshore deposits or inland sand source.
This process does halt the erosion temporarily, and improves recreation without all of the obtrusive environmental effects of hard stabilization. However, it has proven to be quite inefficient and again causes adverse effects to adjacent beaches, such as increased wave potency.
The other viable option is relocation of threatened structures.
Obviously this is rarely popular with private homeowners and businesses because of the expense. However this option poses minimal environmental damage and is usually a one-time expense if the relocation is done properly.
Abandonment of threatened coastline structures is another option that may be cheaper for the private landowner, but becomes a considerable public cost.
from standard technical literature & various websites including:
http://jrscience.wcp.muohio.edu & http://www.wikipedia.org