Another site worth checking out.  http://www.snh.org.uk/publications/on-line/heritagemanagement/erosion/4.2.shtml

“The risk to human assets must be balanced against many considerations, including the inevitable damage to the environment. At one end of the risk scale it may be considered better or more cost effective to lose or move an asset rather than invest effort and money into erosion management operations.”

http://www.snh.org.uk/publications/on-line/heritagemanagement/erosion/5.2.shtml#plate-23

“Construction of continuous defences along an eroding dune face will dramatically change the  landscape and will disrupt the natural interchange of sand between beach and dune. This should be avoided if at all possible as the impacts are effectively irreversible. Seawalls and large revetments generally allow some wind blown sand to reach the dunes, but prevent the return of sand to the beach during storm erosion events.”

“It is important to bear in mind that erosion of dunes is a natural process and should not normally be regarded as a problem.”

“Construction of continuous defences along an eroding dune face will dramatically change the coastal landscape and will disrupt the natural interchange of sand between beach and dune.”

“…consideration should be given to the full life environmental impacts of proposed management operations. The manager must consider not only the local short term impact of a scheme, but also:

  • the impact on the source area for materials (offshore dredging areas, rock quarry, forests, etc)
  • the impact of transport to the site (road congestion and surface damage, noise levels, risk of accidents at sea or on roads, access through dunes, etc)
  • the impact of damaged or life expired materials on the shoreline (synthetic fencing materials, geotextile sand bags, gabion baskets and rock fill, timber, concrete, rock, etc).  (THIS IS IMPORTANT TO CONSIDER WHEN SANDBAGS FOR EXAMPLE ARE INCORPORATED)
  • the long term evolution of the beach and dunes and the effectiveness of structures over their full life.”

 

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