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Q: What causes the swash process take place at an angle?
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What are corrosion abrasion solution and attrition all types of?

swash


What is the destructive ocean wave produced by an earthquake?

There are 2 ways. One way is when large waves have a backwash that is stronger than the swash. The stronger backwash causes more materials to be removed from the beach instead of being deposited. The other way is when there is a storm, strong winds produce large waves which pound against the coast and remove large amounts of materials from it.


What is short shore drift?

Short shore drift consists of the transportation of sediment (clay, silt, sand and shingle) along a coast at an angle to the shoreline, which is dependent on prevailing wind direction, swash and backwash. This process occurs in the littoral zone, and in or close to the surf zone. The process is also known as short shore transport or littoral drift.Short shore drift is influenced by numerous aspects of the coastal system, with processes that occur within the surf zone largely influencing the deposition and erosion of sediments. Short shore currents can generate oblique breaking waves which result in short shore transport.Short shore drift can generally be defined in terms of the systems within the surf zone as seen in figure 1. This figure shows that sediment transport along the shore and surf zone is influenced by the swash (occurs in the direction of prevailing wind), which moves the pebble up the beach at the angle of the waves, and moves the pebble back down the beach due to the influence of gravity.Short shore drift affects numerous sediment sizes as it works in slightly different ways depending on the sediment (e.g. the difference in long shore drift of sediments from a sandy beach to that of sediments from a shingle beach). Sand is largely affected by the oscillatory force of breaking waves, the motion of sediment due to the impact of breaking waves and bed shear from long shore current. Whereas because shingle beaches are much steeper than sandy ones, plunging breakers are more likely to form, causing the majority of long shore transport to occur in the swash zone, due to a lack of surf zone.


How can waves be responsible for both erosion and deposition?

All waves are responsible for both but, the overall (net) effect depends on the strenght of the swash (forward movement) and backwash (backwards movement). There are two main types of waves. The first is constructive waves which has a strong swash but the water quickly loses energy (depositing matierial) and then moving back to the sea with a weak backwash (therefore not moving much sediment away). The second is destructive waves which have a much stronger backwash than swash meaning more sediment gets removed than added leading to net erosion. Waves can also erode cliff faces by three processes: Abrasion(sediment in the sea is thrown against cliff face), Solution(chemicals in the sea erode certain rock types) and hydraulic action( water forced into cracks in the cliff face creates 'explosive' effect when wave draws back).


What does a constructive wave do?

Constructive waves are waves with low energy, thus have a stronger swash then backwash. Where there are less than 8 waves breaking each minute they tend to be constructive waves. Constructive waves tend to deposit material and build up a beach.