The agents of erosion are waves, water, wind and ice. The process of weathering dissolves rock or breaks it down into tiny fragments, making it weak and susceptible to erosion. The agents of erosion carry fragmented rocks away, causing the earth to be worn away.Know More
All forms of water cause erosion. In dry environments, raindrops cause splash erosion, which moves small particles of soil. The water that collects on the Earth’s surface causes sheet erosion when it starts to move towards streams. Water in streams is a powerful agent of erosion because it moves fast and can pick up and move large soil particles and objects. Streams that move slowly move fine sand. Erosion by water wears away river banks and alters the shape of coastlines. Erosion by wind occurs often in dry areas, such as deserts, where it forms sand dunes.
Strong wind erodes cliffs and rocks, making them smooth. Wind also moves volcanic ash and dust. Ice often causes erosion on mountain tops and frigid areas. As glaciers move downhill, they pick up and move rocks and sand, which scrape the ground, causing erosion. Waves in large bodies of water, such as oceans, are responsible for coastal erosion.
Human activities, such as cutting down trees, facilitate erosion. Global warming is linked to severe and frequent storms and speeds up erosion.Learn more in Erosion & Weathering
Plants and animals become agents of mechanical weathering when their growth, activities or movements expose rocks to the weathering actions of wind, rain and ice. The roots of plants, particularly large trees, can shift the soil and lift or crack rocks that block their paths. Animals often dig tunnels that cause the same effects, but their burrowing, foraging and den-making activities can also cause rocks to become exposed.Full Answer >
Wind erosion happens when pieces of the Earth are worn away by strong winds over time, and water erosion happens when moving water such as ocean waves wear away rock instead of seeping into the ground. Water is a more powerful erosion force than wind.Full Answer >
Erosion is a process that causes the soil surface to wear out; geological erosion is caused naturally by water, wind or gravity, and accelerated erosion is caused by human use of land. Geologists estimate that 70 percent of soil erosion is caused by human activities like excessive construction, agriculture, surface mining and forestry.Full Answer >
There are several ways to prevent erosion, including grassing waterways, conserving tillage, covering crops, managing pastures and fortifying stream and riverbanks. Some erosion control methods, such as fortifying embankments along waterways, take place at the source, while others, such as modifying farming techniques, occur offsite. These techniques help to control and stabilize erosion on short- and long-term bases and are ideally used in combination.Full Answer >