If you've found the resources on this site useful please consider making a secure donation via PayPal to support the development of the site. Coastal Management Attempts by humans to manage coastal erosion. Coastal Management. Related Topics Use the images below to explore related GeoTopics.
Hard Engineering. Soft Engineering. The Holderness Coast. As usual, hard engineering techniques are high technology, high cost, human made solutions. They do little to work with nature and sustainability is a key issue with them, despite their initial signs of success. Soft engineering techniques are low tech, low cost solutions that work with nature to reduce erosion.
These are the most obvious defensive methods. Sea walls are exactly that. Giant walls that span entire coastlines and attempt to reduce erosion and prevent flooding in the process. They also produce a strong backwash in waves which undercuts the sea wall making their long term sustainability questionable. Traditionally, sea walls are large flat walls however more modern sea walls have a curved structure that reflects waves back into incoming waves, breaking them up and further reducing erosion.
Groynes are relatively soft hard engineering techniques. Groynes are pretty effective but they have one major drawback. This, in turn, means that sections of the coast will be more exposed to erosion down drift of the groynes which can create new problems relating to coastal management. Gabions are quite simply bundles of rocks in a metal mesh. Revetments are concrete or in some cases wooden structures that are built along the base of a cliff.
The revetments absorb the energy of the waves, preventing the cliffs from being eroded. Revetments can be modified so that they have rippled surfaces, which further help to dissipate the wave energy. Revetments are normally successful at reducing coastal erosion but they are expensive to build.
Riprap are just rocks and stones that have been put against the base of a cliff. This makes them look slightly more appealing as they blend into the environment better however the rocks are susceptible to being moved by the sea.
There are two types of coastal management: Hard engineering - this involves building structures to protect the coast. Soft engineering - this involves working with nature by using natural materials or allowing nature to take back areas. Hard engineering Soft engineering. The Coastal Act supports the protection of the coast and coastal resources through the provision of technical information to inform planning decisions.
This includes the declaration of erosion prone areas and coastal management districts and the setting of development assessment codes for the Planning Act. The Coastal Management Plan provides guidance for the protection, conservation, rehabilitation and management of the coastal zone, including its resources and biological diversity.
It provides coastal land managers with guidance on management planning, activities and works that are not defined as coastal development activities under the Planning Act.
Find out more about Coastal Management Plan.
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