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Coastal erosion is the loss or displacement of land, or the long-term removal of sediment and rocks along the coastline due to the action of waves, currents, ...
A discordant coastline occurs where bands of different rock types run perpendicular to the coast. [1] The differing resistance to erosion leads to the formation of headlands and bays. A hard rock type such as granite is resistant to erosion and creates a promontory whilst a softer rock type such as the clays of Bagshot Beds is easily eroded ...
These include rising sea levels, increased flooding risk, changes to the makeup of the land (e.g. a habitable area becoming a wetland), coastal erosion, increased susceptibility to dangerous cyclones, droughts, water shortages, wildfires, and other factors, all of which can overlap with each other to enhance the risk of danger or inhabitability ...
At Point Pelee, approximately 1,900 hectares of former agricultural land on the cuspate foreland is now under water as a result of wind erosion and compaction of organic soils on the foreland. [10] This foreland is particularly vulnerable to erosion when high lake levels are combined with spring and autumn cyclonic activity. [10]
Attrition erosion of the coast in Langeland, Denmark, shows how high impact energy of sediment particles affect ocean-land contact points. The rising of sea levels has led to an increase in coastal erosion. This causes concern to policymakers, coastal researchers, and real estate planners due to erosions effect on flooding. [24]
Examples of hard engineering include: Groynes – Low walls constructed at right angles to retain sediments that might otherwise be removed due to longshore drift.These structures absorb or reduce the energy of the waves and cause materials to be deposited on the updrift side of the groyne facing the longshore drift.
Integrated coastal zone management minimizes the negative human impacts on coasts, enhances coastal defense, mitigates the risk associated with the sea level rise and other natural hazards. The beach erosion is a type of bioerosion which alters the coastal geography through beach morphodynamics .
River erosion can be driven by tectonic uplift, climate, or potentially both mechanisms. It is difficult in many areas, however, to decisively pinpoint whether tectonism or climate change can individually drive tectonic uplift, enhanced erosion, and therefore terrace formation. In many cases, simplifying the geologic issue to tectonic-driven vs ...