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GeographyEasyAsked in: CDS · CDS-I 2019, GK

Which one of the following river valleys of India is under the influence of intensive gully erosion?

  1. A.Kosi
  2. B.Chambal
  3. C.Damodar
  4. D.Brahmaputra

Correct answer

B. Chambal

Explanation

The correct answer is B, Chambal. The Chambal valley is the best-known Indian example of land destroyed by intensive gully erosion, which has carved it into deep ravines.

Running water on the soft alluvial soils of the Chambal basin in Madhya Pradesh, Rajasthan and Uttar Pradesh cuts deep channels called gullies. When the gullies widen and join, farmland turns into a maze of ravines, called badlands or beehad. These ravines cover several lakh hectares and were once known as hideouts of dacoits. Afforestation, contour bunding and check dams are used to stop them spreading.

Option A is wrong because the Kosi is known for floods and frequent shifts of its course, which earned it the name Sorrow of Bihar. Option C is wrong because the Damodar is known for floods and its coal-rich valley, not for ravines. Option D is wrong because the Brahmaputra valley suffers mainly from floods and bank erosion.

Exam tip: gully erosion = Chambal ravines (badlands); sheet erosion removes a thin layer of soil over a wide area.

Practice Questions

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Q2.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements is/are correct? 1. Himalayan rivers have their origin in the snow-covered areas, hence are dry in winter season. 2. Rivers of the Peninsular Plateau have reached maturity. 3. Himalayan rivers depict all the three stages of normal cycle of erosion. Select the correct answer using the code given below.

  1. A.2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: C. 2 and 3 only

Himalayan rivers are perennial, so statement 1 is wrong, while statements 2 and 3 are correct. Himalayan rivers such as the Ganga, Indus and Brahmaputra rise from glaciers and snowfields and also get monsoon rain, so they flow all year round, including in winter.

Q3.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following statements related to latitude are true? 1. Rainfall, temperature and vegetation vary with latitude. 2. The difference between the longest day and the shortest day increases with latitude. 3. Indira Point is located approximately at 6°45' N latitude. Select the correct answer using the code given below.

  1. A.1 and 2 only
  2. B.1 and 3 only
  3. C.2 and 3 only
  4. D.1, 2 and 3
Show answer
Correct answer: D. 1, 2 and 3

All three statements about latitude are true. Latitude decides how directly the Sun's rays strike a place, so temperature, rainfall and the type of vegetation change from the equator towards the poles, from hot, wet rainforests to cold tundra.

Q4.GeographyAsked in: CDS · CDS-II 2017, GKMedium

Which of the following lakes is/are situated in Ladakh? 1. Tso Kar 2. Pangong Tso 3. Tsomgo 4. Tso Moriri Select the correct answer using the code given below.

  1. A.1 only
  2. B.2 and 3
  3. C.1, 2 and 4
  4. D.2 and 4 only
Show answer
Correct answer: C. 1, 2 and 4

Tso Kar, Pangong Tso and Tso Moriri are high-altitude lakes of Ladakh, while Tsomgo lies in Sikkim. Pangong Tso, at about 4,350 metres, is a long, narrow lake that stretches from Ladakh into Tibet, and most of its length lies on the Chinese side.