Coasts Essay

644 words - 3 pages

At Point Peron, there are many coastal processes, which affect the environment by constructing and destructing different coastal elements. These coastal processes include long shore drift, deposition, weathering and erosion. Each of these processes affects the environment differently.

- Destructive waves are powerful and forceful. They destruct/break down the coast. Destructive waves can create both spectacular and catastrophic consequences such as naturally formed arches, stacks, stumps, wave cut notches and even the creating of bays.

- Constructive waves on the other hand build up the coast by adding sand to beaches. This occurs when the swash, the movement of water up a beach when a wave breaks, is more powerful than the backwash, the movement of water back down the beach to the sea. The photo left shows the result of the swash being stronger than the backwash. Constructive waves are typically not as rough as destructive waves.

- Longshore drift (LSD) is the moving of sand down a beach. It drastically changes the appearance of the coast. This is because tones of sand from one end of a beach are moved to the other end. This can cause spits, sandbars and tombolos. A diagram showing longshore drift is pictured right, where the LSD has moved sand from the left hand side of the beach to the right, forming a spit. Bars and tombolos differ from spits because a tombolo is a spit that connects the mainland to an island, and a bar is a spit that joins one part of the mainland to another. A diagram showing how longshore drift occurs is shown below.
By Connor Blackburn and Brock Nicholls

- Cliff recession is the moving of a cliff inland, as it slowly collapses and recedes. The cliff collapses because a wave cut notch forms under a cliff, and the cliff cannot support all the weight on the wave cut notch, so that part collapses. This leaves behind a wave cut...

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