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Coastal protection soft engineering
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Coastal protection soft engineering

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  • In the Maldives, Reefscapers developed a new versatile artificial reef system, the “Coral Trays”. Broken or threatened corals are harvested from the donor areas, usually threatened by coastal developments and fragments prepared before being attached on the Coral Trays. These new structures prevent predation and sedimentation, and promote survival and growth. Their light weight enables an easy deployment using a simple whaler as well as to change their location at will. This could be useful in case of prolonged high sea surface temperatures events. The shapes and sizes of the structures mostly depends on the objectives and different designs and transplantation processes have been adapted to the species present in the Maldives. Transplantation is done by snorkelling or diving depending on the depth. After 6 to 12 months, the newly established reef is able to produce the fragments for further generations of transplants. After about a year, the growth enables the pruning of 3 to 10 times the initial stock. The reef created is thereafter self sustainable. In most environments, the Coral trays substratum efficiency insures an essential survival enabling significant coral propagation as well as small and large scale research.
  • In the Maldives, Reefscapers developed a new versatile artificial reef system, the “Coral Trays”. Broken or threatened corals are harvested from the donor areas, usually threatened by coastal developments and fragments prepared before being attached on the Coral Trays. These new structures prevent predation and sedimentation, and promote survival and growth. Their light weight enables an easy deployment using a simple whaler as well as to change their location at will. This could be useful in case of prolonged high sea surface temperatures events. The shapes and sizes of the structures mostly depends on the objectives and different designs and transplantation processes have been adapted to the species present in the Maldives. Transplantation is done by snorkelling or diving depending on the depth. After 6 to 12 months, the newly established reef is able to produce the fragments for further generations of transplants. After about a year, the growth enables the pruning of 3 to 10 times the initial stock. The reef created is thereafter self sustainable. In most environments, the Coral trays substratum efficiency insures an essential survival enabling significant coral propagation as well as small and large scale research.
  • Transcript

    • 1. Soft Engineering
      Use of ecological principles and practices to reduce erosion and achieve the stabilization and safety of shorelines and the area surrounding rivers, while enhancing habitat, improving aesthetics, and saving money. 
    • 2. How do the various soft engineering methods protect the coastline?
      What is the thing/object you see in the picture.
      How does it protect the coast? Does it reduces wave energy?
    • 3. Sand Dunes
    • 4. Identify the Dunes
    • 5. Stabilize Sand Dunes
      Sand Dunes : A ridge of sand piled up by wind on the coast.
      Why do we need to protect a dune?
      What does a dune protect?
      It provides a habitat for many animals including migratory birds.
      Roads and houses against coastal erosion and flooding.
    • 6. Stabilize Sand Dunes
      How do we stabilize a dune?
      What is a dune made up of?
      Planting vegetation on the dune so that the roots can hold on to the sand.
      Sand
    • 7. Vegetation on Dunes
    • 8. Mangrove
    • 9. Protecting MANGROVES
      Mangroves: A type of natural vegetation whereby plants are well adapted to grow in saline conditions.
      What are some qualities of a mangrove?
      Why do we need to protect a mangrove to protect a coast?
      Plants have prop roots that can help in trapping and holding sediments
      It can reduce the impacts of wave erosion by trapping sand
      It encourages the extension of the coastline as the mangrove grows.
    • 10. Prop Roots
      Beginning Signs of Coastal Extension
    • 11. What’s this picture showing?
    • 12. What’s this picture showing?
    • 13. What form coastal protect is this?
    • 14. Beach Nourishment
      Adding of large amounts of sand to a beach
      Type A
      Type B
      Importing foreign sand
      Using sand from the same beach, just from a different section.
      What are some things that needs to be considered when importing foreign sand?
      If a beach is supplemented by its own materials, what is the beach likely to be experiencing?
      Grain Size
      Long Term Cost
    • 15. What’s happening here?
      What’s this?
    • 16. Coral reefs are masses of rock like substances growing in shallow seas.
      They protect the coasts against coastal erosion by reducing the speed of the waves.