Managing our coastlines is a very important subject, as the
physical effects of the waves crashing up against the land can cause problems
such as erosion and long shore drift. Thankfully, several management strategies
were founded, allowing us the means to control these natural processes.
There are two main categories of coastline management
strategies, ‘hard’ and ‘soft’ management.
Hard engineers will normally cost
more money, are quick to be put into action and are sometimes only used as a
short term fix that may visually and physically affect the environment. The
other option is ‘soft’ engineering techniques, which are comparatively cheaper
and are normally executed with a more long term and sustainable view.
Rock armour is generally considered as a ‘hard’ method, and
is sometimes used in rough areas where there is little alternative option than
to protect the coastline long term through the placement of some sort of
structure(s).
Rock Armour
Otherwise known as Riprap and Boulder Barriers, Rock armour
consists of many large boulders piled up on top and next to each other, most
commonly found on beach fronts and in areas of rough waves. These boulders are
highly effective in the absorbing of the energy that comes from the waves. The
main disadvantage associated with this method is the difficulty involved in
transporting and placing masses of large, heavy boulders.
Sea Wall
A man made wall that has been built into the water,
separating the sea from the land area is another method employed by construction
workers and civil engineers, in aim to protect the coastline from the crashing
water. These seal walls are especially effective in preventing coastal floods,
as they leave no room for leakage. Although worthwhile, a seal wall is very
difficult to build and will require maintenance as it will take some damage
from waves and erosion over time.
Groynes
These can be simply described as wooden barriers that are
built at right angles in relation to the beach. They are relatively simply to
erect, and prevent the movement of beach materials along the coast by long shore
drift and promote the healthy build-up of a beach – of which are natural
guardians of the coastline (and of course excellent tourist attractions). These
are highly effective in its use, however can be displeasing on the eyes and will
need maintenance over its lifetime.
Soft management techniques are cheaper and usually more
sustainable, but my not enjoy immediate success. Soft options include beach management
– the replacement of sand that has been takes and compacted over time, along
with the creation of managed retreats. This allows water to flow freely around
its crashing point, but will often require the redevelopment of land by the
coastline.
Jennings building and civil engineer contractors are geared
up to help prevent erosion and damages to our beloved coastlines. With
capability that will allow them to transport boulders for rock armour, they are
an excellent choice when it comes to your planning and construction needs.
Image from 'ernohannink' license
Image from 'ernohannink' license
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