what are the causes and effects of beach erosion?
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Beach erosion is usually caused by ocean currents and waves. The energy of the moving water pulls sand away from the shore. High winds speed up erosion. ... Building along the coast can damage sand dunes, which are mounds of sand that separate the lower beach from higher ground.
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['Reduce wave height and strength.', 'Reduce erosion.', 'Protect coastal development.']
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Soil erosion is the process of the soil being carried away by mostly water or wind. Soil depletion means that the quality of the soil goes downs, like when crops take up the soil nutrients and the farmers don't fertilize the soil to replenish the nutrients.
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normal erosion. [′nȯr·məl i′rō·zhən] (geology) Erosion effected by prevailing agencies of the natural environment, including running water, rain, wind, waves, and organic weathering. Also known as geologic erosion.
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The major causes of land degradation include, land clearance poor farming practices, overgrazing, inappropriate irrigation, urban sprawl, and commercial development, land pollution including industrial waste and quarrying of stone, sand and minerals.
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['1) Sheet erosion by water;', '2) Wind erosion;', '3) Rill erosion – happens with heavy rains and usually creates smalls rills over hillsides;', '4) Gully erosion – when water runoff removes soil along drainage lines.', '5) Ephemeral erosion that occurs in natural depressions.']
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EROSION: Wearing away the soil and rocks. This puts lots of sand, mud, pebbles and silt into the river. TRANSPORT: Moving material. The force of the flowing water moves the mud, sand, pebbles and silt created by erosion.
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Agriculture is probably the most significant activity that accelerates soil erosion because of the amount of land that is farmed and how much farming practices disturb the ground (Figure 1). Farmers remove native vegetation and then plow the land to plant new seeds. ... Fine soil is blown away by wind.
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These dunes form when complex wind patterns alternate direction and change the way sand is piled onto the dune. ... Weathering is the physical and/or chemical breakdown of surfaces due to wind, water, or ice. Erosion is the process of moving the broken down material from one place to another via wind, water, or gravity.
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['Rainfall and Runoff. ... ', 'Soil Erodibility. ... ', 'Slope Gradient and Length. ... ', 'Cropping and Vegetation. ... ', 'Tillage Practices. ... ', 'Sheet Erosion. ... ', 'Rill Erosion. ... ', 'Gully Erosion.']
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['Abrasion: The erosion of the river bottom and the riverbank by material being carried by the river itself.', 'Attrition: The rocks and pebbles being carried by the river crash against each other, wearing them down to become smaller, rounded pebbles.', 'Corrasion: see Attrition.']
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There are two main types of erosion: chemical and physical. Chemical erosion occurs when a rock's chemical composition changes, such as when iron rusts or when limestone dissolves due to carbonation.
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The construction of beaches Actually sediments of sand originate from the weathering of rocks resulting from natural elements such as water, wind, and sun. ... Many popular beaches around the world are not only a result of natural forces, but are actually to some degree man-made.
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['Deeper, darker coloured water. Once waves hit the shore they have to go somewhere. ... ', 'Fewer breaking waves. ... ', 'A rippled surface surrounded by still water. ... ', 'Seaweed, sediment and churning, sandy clouds floating towards the back of the waves.']
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These impacts include compaction, loss of soil structure, nutrient degradation, and soil salinity. ... The effects of soil erosion go beyond the loss of fertile land. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in fish and other species.
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Gravity, running water, glaciers, waves, and wind all cause erosion. The material moved by erosion is sediment. Deposition occurs when the agents (wind or water) of erosion lay down sediment. Deposition changes the shape of the land.
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Erosion occurs when rock particles are moved by an external force or agent. The agents of erosion are ice, water, wind, waves and gravity. The degree to which erosion occurs depends on the slope of the land, amount of rain or snow, wind and looseness of the rock and soil.