Descriptive Essay On Coastal Erosion

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Waves can be defined as a surface disturbance of a fluid in which energy is transferred. Waves are seen as the main contributing factor in coastal erosion all over the world. Waves come in all shapes and sizes. Different types of waves have been given individual names, depending on their characteristics.
Wave types
Wind Waves
Wind waves are formed when a gust of wind blows over the surface of the water. There is some friction between the bottom layer of the wind and the top layer of the water and this causes motion. This bottom layer is then forced to slow down while the top layers are forced to topple over the bottom layer, causing the wave motion in the ocean. There are a number of factors affecting wind wave height such as water depth, …show more content…

Destructive waves are generally created during storm conditions due to strong winds blowing over a large fetch. Destructive waves have a big impact on erosion. With their short wavelength and high steep, they crash down onto the coast and drag out soil and rocks with powerful back washes. Destructive waves undermine cliffs, wash away land, kill vegetation and flood low lying land. Constructive waves are the opposite to destructive waves. With their strong swash, they enrich beaches and coastlines with freshly deposited material. (Geography: An Integrated Approach by David Waugh2000)
Waves erode the coast through 4 different processes. These processes include hydraulic action, corrosion, attrition and abrasion.
Hydraulic action is the direct force of the wave striking the cliff face. When the wave hits the cliff face, air and water are forced into gaps in the cliff face at high speeds and pressures, causing parts of the cliff face to break away.
Corrosion occurs in rocks which are vulnerable to weak acids carried in the ocean. These rocks are dissolved by the acids.
Attrition takes place when the force of a moving wave causes rocks to bump into each other and break

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