To find out if beach material is moved across Porlock Bay by longshore
To find out which type of sea defense is best for Porlock bay.
If L.S.D. (long shore drift) were taking place I would expect to find:
a) Deposition at one end of the bay and against any abstractions such
b) An increase in pebble roundness in the direction of long shore
drift. The process of attrition will erode the pebbles.
c) A decrease of pebble size in the direction of long shore drift,
again attrition is involved.
d) Undercutting (active erosion of the cliffs at one end of the bay).
If Long Shore Drift were taking place, I would expect to find:
* Deposition of pebbles on one side of any obstruction. This
obstruction could be a headland or an artificial barrier such as a
* A decrease in pebble size in the direction of long shore drift.
* An increase in pebble roundness in the direction of long shore
I visited the two extreme ends of the beach, Gore point at the west
and Hurl stone point at the east, at each end I measured:
* The shape of the beach known as the beach profile, using a tape
measurer and a clinometer. A clinometer measures the angle of a
* The size and shape of a sample of pebbles. These pebbles were
picked out randomly. We took 100 pebbles from each end and
measured their length using a ruler and used the shape chart to
decide what shape the pebbles were.
First we had go...
... middle of paper ...
However, if any action is taken to defend the coastline, if you hinder
in nature's course of beach erosion, there will always be after
effects resulting from unnatural intrusion. This proves that any sea
defence could prove a problem especially with the land owned by Nation
Nevertheless if you could prove to the owners of the land to the
extent of which erosion is taken place and show them how much LSD is
affecting the area, action may well become a better option.
Whilst staying in the area I decided to investigate the effects of LSD
on the coastline and show how it affects the coastline. If LSD has
affected the area there would be more material at one end of bay as
well smaller smother stones at the same end. This is because they
would be eroded down whilst traveling from one end to the other.
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