Describe and Explain the Concept of a Sediment Cell and How It Can Be Used in Coastal Management

2027 Words Sep 17th, 2013 9 Pages
Describe and explain the concept of a sediment cell and how it can be used in coastal management
A sediment cell is a length of coastline in which interruptions to the movement of sand or shingle along the beaches or near shore sea bed do not significantly affect beaches in the adjacent lengths of coastline. In addition to this, it can also be referred to a sediment that is moved along the coast by long shore drift appears to form part of a circular cell which leads to it eventually returning up drift. Dredging of offshore shingle banks can therefore contribute to beach depletion. Also, sediment cell includes coastal processes which are all done by the process of long shore drift going along the beach. In addition to all this, landforms
…show more content…
As undercutting continues, the cliff will eventually collapse and retreat. Also, the gentle sloping rocky platform left behind when the cliff retreats is called a wave-cut platform. This feature is only exposed at low-tides ( basically when half moon is occurring ).
To add to sediment cells description and explanation main processes of marine erosion has to be included. When the waves break in the coastline they often do so with loads of impact. Using the data provided in a source, it has been estimated that waves breaking against the foot of a cliff can generate energy of 25-30 tonnes m-2 4. There are several ways in which waves are able to erode coastlines. * Hydraulic action is one of the most vital ones when it comes to the explaining why the erosion occurs. Hydraulic action is a form of erosion caused by the force of moving water currents rushing into a crack in the rock face.It is strong enough to loosen sediment along the river bed and banks. The water compresses the air in the crack, pushing it right to the back. * Abrasion/corrosion –Abrasion and corrosion includes loads of science to it, on the other hand its easy to explain because it uses loads of common sense. Abrasion is the mechanical scraping of a rock surface by friction between rocks and moving particles during their transport by wind, glacier, waves, gravity, running water or erosion. After friction, the moving

Related Documents