10/18/2023 0 Comments How does dredging work graphic![]() ![]() Headlands refract waves around them, reducing their erosive power at one location while increasing it at another. ![]() Beaches increase the distance a wave travels before it reaches the coastline’s cliffs and so reduces its energy. This means that the bathymetry (the underwater elevation) of the ocean or sea bed also impacts the strength of waves.Ĭertain landforms further reduce wave’s erosive power. As waves approach a coastline they lose energy though because friction with the seabed increases. Longer fetches & stronger winds create bigger, more powerful waves that have more erosive power. A wave’s strength is controlled by its fetch and the wind speed. The biggest factor affecting coastal erosion is the strength of the waves breaking along the coastline. As it increases, dissolution becomes slower. The rate of dissolution is affected by the concentration of carbonates & other minerals in the water. Several rocks (e.g., Limestone) are vulnerable to this acidic water and will dissolve into it. Corrosion 1: Carbon dioxide in the atmosphere is dissolved into water turning it into a weak carbonic acid. Attrition: Beach material is knocked together in water reducing their size and increasing their roundness & smoothness. If sand & shingle are present in the water, it will act like sandpaper and erosion will take place faster. Corrasion/Abrasion: The repeated action of waves breaking on a cliff is enough to remove material from it over time. Over long periods of time, the growing cracks destabilise the cliff and fragments of rock break off of it. Methods of Erosion Hydraulic Action: When a wave impacts a cliff face, air is forced into cracks under high pressure, widening them. ![]() It leads to the formation of many landforms and, combined with deposition, plays an important role in shaping the coastline. You should really enable it for this site but most things should work without it.Ĭoastal erosion involves the breaking down and removal of material along a coastline by the movement of wind & water. ![]()
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