Question

what is soil erosion? what are the various types of soil erosion in India. suggest some measures to conserve soil class. 10

Answer 1

The loss of soil cover due to natural agents like wind and running water is called soil erosion.

Types of Soil Erosion :
(a) Water Erosion : Water is a powerful agent of soil erosion. Following are the major types of erosion caused by water.

(i) Sheet Erosion : When the top layer of the soil is removed over a large area by the running water, it is called as sheet erosion.

(ii) Rill Erosion : This is the second stage of sheet erosion. If erosion continues unchecked for a sufficient time, (rills) or small finger-shaped grooves which are a few centimetres in depth, may develop on the landscape. Over a period of time, the fine rills increase in number and also become deeper and wider, and resemble the twigs, branches and trunk of a tree. This is called as rill erosion.

(iii) Gully Erosion : This is the third stage of sheet erosion. With further erosion of the soil, the rills may deepen and become enlarged, and are ultimately turned into gullies. The main cause of gully erosion is the removal of vegetation, particularly of trees with their widespread binding roots. Gullies cut up agricultural land and the entire area may be turned into a bad land topography. Gully erosion is also responsible for the formation of ravines.

(b) Wind erosion : Wind is a powerful agent of erosion in arid and semi-arid lands with little rainfall. Wind can lift the valuable top soil from one area and deposits in another area. The wind erosion is very dangerous type of erosion because due to wind most of the deserts of the world are expanding.



The 3 main principles to control erosion are to:

use land according to its capability.
protect the soil surface with some form of cover.
control runoff before it develops into an erosive force.

Other measures are :
Plant grass and shrubs. ...
Add mulch or rocks. ...
Use mulch matting to hold vegetation on slopes. ..
.Put down fiber logs. ....
Build retaining walls. ...
Improve drainage. ...
Reduce watering if possible. ...
Avoid soil compaction.

Answer 2

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Soil Erosion➫ The removal of top layer of the soil by the action of wind & rainfall is called soil erosion.

♦ This is a naturally occurring process that affects all landforms.

❱ This natural process is caused by the dynamic activity of erosive agents like:-

♦ Water
♦ Ice
♦ Snow
♦ Air
♦ Plants
♦ Animals
♦ Humans

➧ Types of Erosion are:-
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[1] Splash Erosion:-

❱ The first stage in the Erosion process.
Splash Erosion results from the bombardment of the soil surface by rain drops.

[2] Sheet Erosion:-

❱ The uniform removal of soil in thin layers by the forces of raindrops & overland flow.

[3] Rill Erosion:-

❱ The removal of soil by concentrated water running through little streamlet.

[4] Gully Erosion:-

❱ The removal of soil along drainage lines by surface water runoff.

➧ Causes 0f Soil Erosion are:-
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❱ Water

❱ Winds

❱ Glacier

❱ 0ver Grazing

❱ Human Activities

➧ Factors that cause Soil Erosion are:-
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❱ Rainfall

❱ Topography

❱ 0vergrazing

❱ Deforestation

❱ Human Activities

❱ Presence of 0rganic Materials in Soil

➧ Measures to Prevent Soil Erosion are:-
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❱ Strip Farming

❱ Soil Rotation

❱ Soil Stabilisation

❱ Terrace Farming

❱ Vegetation Cover

❱ Controlled 0ver-Grazing

➧ Effects 0f Soil Erosion are:-
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❱ Landslides

❱ Flash Floods

❱ Desertification

❱ Loss of soil fertility

❱ Silting of Rivers & Lakes

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