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प्रश्न
Distinguish between the following:
Sheet erosion and gully erosion.
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उत्तर १
Sheet Erosion :
- Sheet Erosion causes washing out the upper layer of soil and vegetation cover due to heavy rainfall or floods.
Gully Erosion :
- Through gully erosion deep cuts, cracks and trenches are carved in the soil-bed, These tend to be deeper channels known as ‘gullies’.
उत्तर २
Sheet Erosion: When the vegetation cover of an area is removed, the rain, instead of sinking into the ground, washes the soil downslope. Each succeeding rain-storm washes away a thin layer of absorbed top soil. This is known as Sheet Erosion.
Gully Erosion: When rain falls more heavily, the flow off stormwater finds its way downhill in a series of channels.
Every fresh down pour widens and deepens the channels which develop into gullies. Gullies cut up agricultural land into small fragments and make them finally unfit for cultivation. This type of erosion is known as Gully Erosion.
संबंधित प्रश्न
Complete the flowchart below.
What is known as mass wasting?
Give a technical term for the following:
Expansion of minerals in rocks on coming into contact with rainwater.
Say whether the following is ‘True’ or ‘False’.
Shear plane is the surface on which movement of a landslide takes place as a result of its breaking off.
Define weathering.
Define the following term briefly:
Soil texture
Give reasons for the following :
A soil dominated by clay makes tilling difficult.
Give reasons for the following :
Grassland soils are less acidic than forest soils.
Give a geographical reason:
Human is an agent of weathering.
A region is having an annual mean temperature of 5°C and an annual rainfall of 1000 mm. Can you comment upon the weathering and the type with the help of the following questions? Discuss in class.
- Which type of weathering will be dominant here?
- Where will such a region be found?
