HELLO . (:

hahaha , aunty here to post about soft engineering which involves the application of knowledge of natural processes to stabilise the coast and reduce erosion. Let me break the down into :


1 . Stabilising coastal dunes ( Sand dune stabilisation )

through planting of vegetation which are tolerant to salt spray, strong winds and sand burial. Sand dunes trap sediments washed and blown up, hence slowing the rate of erosion and creating an effective barrier for flood. Footpaths are created so that people won't trample on the vegetation.

Advantages :

• does not disrupt coastline
  
• creates natural habitats for living things
  
• not regarded as unattrative
  

Disadvantages :

• must be thoroughly researched beforehan therefore it will take long periods of time until established
  

2. Beach Nourishment

The process where sediment lost through erosion for example is replaced on a beach. Nourishment material is transported to the affected area.

Disadvantages :

• expensive
  
• (coastal defense scheme) therefore , poorly dedigned project can result in a severely impacted ecosystem regardless of the maintanance.
  
• have to be regularly renourish since nourished beaches tend to erode fater than natural beaches.
  

Advantages :

• reduces storm damage. During storms with elevated water levels and high waves, a wide beach performs as an effective energy absorber with the wave energy dissipated across the surf zone and wide beach rather than impacting on the upland structures and infrastructure

• Recreational benifits . In many coastal areas, the recreational benefits of a wide beach can lifestyle benefits for residents, additional public open space and improved fishing, diving and surfing conditions.

3. Encouraging growth of coral reefs

Coral reefs are actually made of animals! Coral reefs provide protection for harbors and beaches, which are often found behind reefs because the reefs provide natural protection from heavy wave action caused by coastal storms.

4. Planting of mangroves

Its long and curved roots trap sediments and reduce erosion. However, not all coastal regions can support mangroves and coasts may become shallower thus affecting port activities.


Okay , that's just the brief summary ! For more information , we found a web for you where you can understand better about this topic :D , www.slideshare.net/vickikoh/coastal-management-4 . Please watch the video . thank you !

goodnight!



Nous aimons la Géographie; Rosma .