Beach erosion occurs when waves and currents remove sand from the beach system. The loss of sand causes the beach to become narrower and lower in elevation.
LANDSLIDES. FIND OUT MORE. Erosion is the wearing down and the carrying away of the Earth’s rock by the action of wind and moving water. Erosion happens fastest on steep hillsides after heavy rain, when LANDSLIDES sometimes strike. Sheet erosion.  Soil erosion is characterised by the downslope removal of soil particles within a thin sheet of water.  Sheet erosion occurs when the entire surface of a field is gradually eroded in a more or less uniform way.  It is a gradual process and it is not immediately obvious that soil is being lost. Longshore drift consists of the transportation of sediments (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.  Shoreline erosion is a natural process that occurs on lakes, streams, rivers and along the coast. It is the gradual, although sometimes rapid, removal of sediments from the shoreline.  DNRECMainText. Shoreline erosion and migration Shoreline erosion is the temporary or permanent loss of sand from the beach or dune systems. Although sea level rise is not thought to cause significant beach erosion in itself, higher water levels in combination with wind-driven waves can cause severe erosion. Storms are major causes of shoreline erosion, though storm-induced erosion is rather temporary or local in nature. The most effective way to protect against coastal erosion and shoreline migration is through setbacks. Setting new development and construction sufficiently back from the shoreline allows erosion and shoreline migration to occur without narrowing of beach width or enabling damage to structures. Erosion is the displacement of solids, differing from weathering, which is a BREAKDOWN in minerals. There are 5 types of erosion: gravity, water, shoreline, ice, and wind. Gravity erosion drives the sediments downward, with rate depending on the slope of the place. Water erosion utilizes water to carry sediments away. Shoreline erosion occurs through the currents and waves of the water and also tides in both exposed and sheltered shores. Ice erosion wears away sediments with debris under glaciers similar to sandpaper on wood in a process called abrasion Wind erosion. Wind erosion occurs when the land surface is left bare in regions that are arid enough, as a result of low rainfall, to allow the soil to dry out, and flat enough to allow the wind to carry the soil away over several consecutive days. Soil erosion is characterised by the downslope removal of soil particles within a thin sheet of water.  Sheet erosion occurs when the entire surface of a field is gradually eroded in a more or less uniform way. Feedbacks are also possible between rates of erosion and the amount of eroded sediment that is already carried by, for example, a river or glacier. While erosion is a natural process, human activities have increased by 10-40 times the rate at which erosion is occurring globally. Excessive (or accelerated) erosion causes both on-site and off-site problems. Water and wind erosion are the two primary causes of land degradation; combined, they are responsible for about 84% of the global extent of degraded land, making excessive erosion one of the most significant environmental problems world-wide. Beach Erosion. Beach erosion occurs when waves and currents remove sand from the beach system. The loss of sand causes the beach to become narrower and lower in elevation (Figure 1). Storm waves carry the sand offshore, depositing and storing the sediment in large sandbars
http://www.factmonster.com/dk/encyclopedia/erosion.html http://www.nda.agric.za/docs/erosion/erosion.htm https://en.wikipedia.org/wiki/Longshore_drift http://www.dec.ny.gov/permits/67096.html http://www.dnrec.delaware.gov/ClimateChange/Pages/ClimateChangeShorelineErosion.aspx http://www.answers.com/Q/When_does_erosion_happen http://www.nda.agric.za/docs/erosion/erosion.htm https://en.wikipedia.org/wiki/Erosion http://coastal.er.usgs.gov/hurricanes/coastal-change/beach-erosion.php
why does shoreline erosion occur