Whyte (1957) while commenting on the problem of soil erosion of Kashmir Himalayas, mentioned, “control of fluctuating grazing was made the responsibility of forest department in 1939 but this appears to have little effect and the problem is as acute as ever”. The outcomes of soil erosion are reduced agricultural productivity, ecological collapse, soil degradation, and the possibility of desertification. In some arid and semiarid areas, wind can be the cause of soil erosion too. Earth Eclipse. It results in a continuous loss of topsoil, ecological degradation, soil collapse, etc. Weathered rock will be removed from its original site and transported away by a … Wind erosion picks up dust particles of the soil and throws them into the air, causing air pollution. The problem may become so severe that the land can no longer be cultivated and must be abandoned. The agricultural plants that often replace the trees cannot hold onto the soil and many of these plants, such as coffee, cotton, palm oil, soybean and wheat, can actually worsen soil erosion. It is this layer of soil that is endangered by wind and water erosion. (a) The bare areas of farmland are especially vulnerable to erosion. Soil erosion is a gradual process that occurs when the impact of water or wind detaches and removes soil particles, causing the soil to deteriorate. Wind is also a leading cause of soil erosion because wind can pick up soil and blow it far away. All Rights Reserved . Also, exposed subsoil is highly erodible to the forces of water and wind. When she is not writing, she loves watching sci-fi movies on Netflix. Soil erosion eats away the top soil which is the fertile layer of the land and also the component that supports the soil’s essential microorganisms and organic matter. Tillage action moves soil to convergent areas of a field where surface water runoff concentrates. The flow of rivers and streams causes valley erosion. Put simply, the causes of soil erosion are somewhat inevitable. It also sends soil-laden water downstream, which can create heavy layers of sediment that prevent streams and … (And Which Foods to Avoid), Can Squirrels Eat Raisins? They also churn up the ground with their hooves. The accumulation of soil and crop debris at the. Agricultural practices such as burning and clearing of vegetation also reduce the overall vegetation cover. Over time, repeated rainfall can lead to significant amounts of soil loss. (b) Slash-and-burn agriculture leaves land open for soil erosion and is one of the leading causes of soil erosion in the world. Soil erosion is a continuous process that occurs either slowly or at an alarming rate. Since Europeans settled in North America, about one-third of the topsoil in the area that is now the United States has eroded away. Water. These types of erosions are caused by the impacts of raindrops on the soil surface that break down and disperse the soil particles, which are then washed away by the stormwater runoff. Accumulated sediments can also cause clogging of water ways and raises the water level leading to flooding. (b) Hiking trails may become eroded. The outward and downward movements of sediments and rocks on slanting or slope surfaces due to gravitational pull qualify as an important aspect of the erosion process. Soil erosion is a major driver of desertification. Some Other Causes of Soil Erosion: 1. Wind erosion happens when wind gusts blow away unsecured soil. Causes of Soil Erosion It gradually transforms a habitable land and the ASAL regions into deserts. The transformation of natural ecosystems to pasture lands has largely contributed to increased rates of soil erosion and the loss of soil nutrients and the top soil. Because most crops grow only in spring and summer, the land lies fallow during the winter. The transformations are worsened by the destructive use of the land and deforestation that leaves the soil naked and open to erosion. Figure 6. It is severe during the times of drought in the ASAL regions. The root structure of trees hold the soil in one place. While there are many types of erosion, all have the same basic process - the removal of topsoil by wind or water. While it is a natural process, caused by the weather, it is also caused by human activity, and it can cause harm to agricultural processes when it occurs rapidly and excessively. These occur more often when the land is not covered with grass or plants. In the absence of trees, it can lead to heavy erosion of topsoil. 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. Even deforestation or reduced vegetation caused by things like forest fires are sometimes unavoidable. The agents of soil erosion are the same as of other types of erosion: water, ice, wind, and gravity. Soil erosion is the washing away of the topsoil from one place to another by erosional agents like wind, water, animals, and glaciers. The leaves and canopy of big, tall trees protects the soil from wind and rain. Recreational activities may accelerate soil erosion. The removal of topsoil by wind and water is called soil erosion. Geologists estimate that 70 percent of soil erosion is caused by human activities like excessive construction, agriculture, surface mining and forestry. 2. The different factors of Soil Erosion are: Wind: When strong winds blow, the topsoil along with the organic substance is carried away by the wind. All soils undergo soil erosion, but some are more vulnerable than others due to human activities and other natural causal factors. lower end of this field is an indicator of sheet erosion. What are National Parks? As mentioned, the predominant causes of soil erosion are either related to naturally-occurring events or influenced by the presence of human activity. When the rivers and streams are full of soil deposits due to sedimentation and the valley levels up with the surface, the water ways begin to wash away the soils at the banks. Grazing animals (Figure 2) wander over large areas of pasture or natural grasslands eating grasses and shrubs. It happens in the place where soil is not covered by plants. Up and down field tillage practices as well create pathways for surface water runoff and can speed up the soil erosion process. Grazing animals can cause erosion if they are allowed to overgraze and remove too much or all of the vegetation in a pasture. While the slash and burn technique of deforestation introduces significant volumes of carbon dioxide into the atmosphere it has become popular due to its speed and cost-effectiveness at clearing an area. When forests are wiped out, the land becomes exposed, leaving it vulnerable to being washed or blown away by elements. Erosion definition. … Sheet erosion affects a whole area, when water or the wind act like a broom to clear out the topsoil. It is likely that most of the cultivated areas around the globe are vulnerable to soil erosion. Figure 1. Luxury Landscape Supply explains the four common causes of soil erosion below. Of course, winter is also the stormy season in many locations, so wind and rain are available to wash soil away. Causes of Soil Erosion: Various agents, like wind, water, deforestation, overgrazing by cattle, and etc., cause soil erosion. It takes place in both dry and wet areas. (a) Disturbed land at a coal mine pit in Germany. Tractor tires make deep grooves, which are natural pathways for water. Some soil erosion causes are mentioned below. Causes of Soil Erosion. This means most of the environmental problems the world face today arises from soil erosion. She loves writing on topics related to space, environment, chemistry, biology, geology and geography. Rain and Rainwater Runoff (And Do They Mate With Other Species). Soils eroded from agricultural lands carry pesticides, heavy metals, and fertilizers which are washed into streams and major water ways. But, before we go into how to prevent soil erosion, you first need to understand what causes it. How Does Photosynthesis Take Place in Desert Plants? Some of the principal causes of soil erosion include: 1. Bank erosion happens when bodies of water sap away the topsoil near its shores. There are many different forces in nature that cause erosion. Hence, wind erosion is a major source of soil degradation and desertification. Man has cut too many jungles, has grazed the grasses excessively, and ploughed the land too often. Once you know why your soil is eroding, you can take the steps to resolve the issue and pacify your neighbor. The consequences of soil erosion are primarily centered on reduced agricultural productivity as well as soil quality. The wind picks up the loose soil particles with its natural force and carries them away to far lands, leaving the soil sculptured and denudated. This reduces soil quality and agricultural productivity. Soil erosion is a process that involves the wearing away of the topsoil. Although soil erosion is a natural process, human activities have greatly accelerated it. (And Almond Butter), Oceanography vs Marine Biology (Are They Same or Different), 20+ Solid Reasons to Stop Deforestation That You Need to Know Today, Why is Biodiversity Important and Reasons For Loss of Biodiversity, Can Squirrels Eat Bread? What causes erosion? Rainstorm produces four major types of soil erosion including rill erosion, gully erosion, sheet erosion, and splash erosion. © 2020 . Rill and gully erosion happen when impromptu streams form for water to carry away topsoil. Distribution of rainfall and landscape: If the ground surface is such that rainfall distributes evenly, … Logging results in the loss of leaf litter, or dead leaves, bark, and branches on the forest floor. Running water is one of the main cause of soil erosion. Factors like heavy rainfall, flooding, high winds, and even mass movements are part and parcel of the cyclical nature of soil. Soil erosion is as natural as any other type of erosion, but human activities have greatly accelerated soil erosion. The tree roots hold the soil together and the tree canopy protects the soil from hard falling rain. Soil erosion refers to the process whereby the top layer of soil is removed. Activities that remove vegetation, disturb the ground, or allow the ground to dry are activities that increase erosion. Without plant cover, erosion can occur and sweep the land into rivers. Deforestation causes some of the worst soil erosion. This technique in parti… The wet areas include; the shores of Lake Victoria, Kigezi highlands, Nyanza province, Imatong hills in southern Tanzania. This leads to water pollution and damage to marine and freshwater habitats. Soil erosion usually happens in overly disturbed soil systems especially with unfavorable weather conditions. A land is overgrazed if too many animals are living there. This erosive activity is evident in most rivers or streams especially during heavy rainfall and rapid river channel movement. Water and wind erosion are two main agents that degrade soils. Trees and vegetation cover help to hold the soil particles together thereby reduces the erosive effects of erosion caused by rainfall and flooding. Deforestation and urbanization destroy the vegetation land cover. So erosion removes topsoil, but how? Fine soil is blown away by wind. Soil erosion is a natural process which has increasingly been exacerbated by human activities such as agriculture and deforestation. Farmers remove native vegetation and then plow the land to plant new seeds. Tillage erosion is the redistribution of soil through the action of tillage and gravity (Figure 8). This is geological erosion.. While there are many different factors that can cause soil erosion, most can be broken down into two main categories: (And Can They Choke on Raisins), Can Squirrels Eat Popcorn? Soil structure and composition is another factor that determines erosivity of wind or rainfall. Uneven distribution of rainfall. Erodibility of soil. What are Natural Resources, Types and Threats to Natural Resources. Water is the most common cause of soil erosion. What is Soil Conservation and What are Various Ways To Conserve Soil? Depending on the type of force, erosion can happen quickly or take thousands of years. Some of the dust particles may contain harmful and toxic particles such as petroleum and pesticides that can pose a severe health hazard when inhaled or ingested. Some of the exposed ground is being reclaimed by planting trees. Soil erosion is the geological process wherein soil particles are detached and transported by various agents of erosion, namely water, wind, glaciers, and gravity. What causes soil erosion? The water flowing in the rivers and streams tend to eat away the soils along the water systems leading to a V-shaped erosive activity. Deforested swatches in Brazil show up as gray amid the bright red tropical rainforest. Agriculture is the main way humans cause soil erosion. Trees and their roots provide the soil with an anchor, as well as shelter from the wind and rain. What is a Habitat and Reasons For Habitat Loss and Destruction? The agents of soil erosion are the same as the agents of all types of erosion: water, wind, ice, or gravity. When vegetation is planted in the ground, the topsoil is shifted, which causes erosion. 3. Causes of Soil Erosion Various agents, like wind, water, deforestation, overgrazing by cattle, etc., cause soil erosion. Apart from polluting the water systems, high soil sedimentation can be catastrophic to the survival of aquatic life forms. Soil erosion from surface water runoff often causes serious damage to roads and tracks, especially if stabilizing techniques are not used. Wind causes erosion of rock particles driven by soil and sand particles that are not tightly glued together and not insulated by vegetation. Greater duration and intensity of rainstorm means greater potential for soil erosion. Soil erosion is more likely where the ground has been disturbed by agriculture, grazing animals, logging, mining, construction, and recreational activities. Surface mining disturbs the land (Figure 5) and leaves the soil vulnerable to erosion. Much of the worldâs original forests have been logged. Runoff washes away the soil particles from sloping and bare lands while wind blows … Water Runoff. (a) ATVs churn up the soil, accelerating erosion. The accumulation of soil sediments in dams/drainages and along embankments can reduce their operational lifetime and efficiency. Why are National Parks Important and How Do They Help the Environment? Sediments may also enter the fish gills, affecting their respiratory functions. Off-road vehicles disturb the landscape and the area eventually develops bare spots where no plants can grow. Figure 3. Farming activities such as tillage also significantly contribute to soil erosion. Why Do White Rabbits Have Red Eyes? The causes of soil erosion are directly related to improper landuse, and are, therefore, entirely man-made. What are some human activities that increase the likelihood that soil will be eroded? Such a case is evident in North America where dust winds from the Gobi desert have recurrently been a serious problem. In this view, soil erosion has severely threatened the productivity of fertile cropping areas as they are continually degraded. (And Which Foods Do They Actually Like), How Do Birds Mate? If too many animals graze the same land area, the animals’ hooves pull plants out by their roots. Many of the tropical forests that remain are currently the site of logging because North America and Europe have already harvested many of their trees (Figure 4). Plant roots firmly hold the soil particles together. 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