Transportation and deposition is when an object if being moved along the coastline by the waves. This is also called long shore drift.
Swash: The up beach movement of a body water after a wave has broken. It can transport material landward or away from the sea.
Destructive waves: With little swash and strong backwash, there is a net removal of material from the beach.
Fetch: The length of open sea over which a wind blows to generate waves. A larger distance offers more potential for larger waves.
Attraction: The reduction in size and increased roundness of material resulting from continual impact with other particles.
Longshore drift: Movement of sediment along the coast by wave action. The swash moves the material up the beach in the same direction as the breaking wave. The backwash moves material down the beach under the affect of gravity (usually at 90 degrees to the beach).
Abrasion: The scraping and scouring, rubbing and grinding of materials by natural forces such as rivers and waves. The rate of erosion depends on the amount of material being carried and the resistance of the rock being eroded.
Hydraulic action: The compression of air into small cracks resulting from wave pounding, which breaks rocks down.
Backwash: The down beach movement of water occurring after the swash has reached its highest point. Removes material from the beach
Constructive waves: with a strong and weak backwash, there is a net accumulation of material on the beach, giving rise to beams and ridges. They are low in frequently and low in height
Hypotheses:
I expected to find lost of rocky stones in Porlock Bay, as these stones have not been eroded, but in Minehead, the pebbles will be more rounded, as they have been worn down and eroded a lot, so that’s why they are more rounded.
Methodology:
To measure the beach, we used measuring tape and clinometers. Firstly we measured the length of the beach with the measuring tape. Then after doing that, we took the angle that the clinometers gave us. Finally we drew a beach profile of how the beach roughly looked like.
Methodology:
Results:
Risk Assessment:
Traffic: Car Park and road
Grassy footpath – slippery and muddy
Steep, rocky footpath – Hurlstone Point
Uneven terrain – beach facets unstable
Don not enter the sea – strong currents
Crumbly cliffs – keep a safe distance
Do not throw pebbles
Groyne at Porlock weir – splintered wood
Shut gates behind you
Clothing and footwear – exposed location
Medication – asthma inhalers, etc
