Q. Consider the following statements regarding south-west monsoon:
1. Peninsular shape of India divides the southwest monsoons into two branches – Arabian Sea branch and Bay of Bengal branch.
2. Arabian Sea branch of southwest monsoons causes heavy rains on the western slopes of the Western Ghats.
Which of statements above given is/are NOT correct?

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: D
Notes:

The peninsular shape of India divides these Southwest monsoons into two branches – Arabian Sea branch and Bay of Bengal branch.  

  • Arabian Sea branch of Southwest monsoons strikes the western coast of India and causes heavy rains on the western slopes of the Western Ghats.  
  • After crossing the Western Ghats, these winds cause less rainfall on the eastern slopes as they gain temperature while descending. This area is, therefore, known as rain shadow zone.  
  • The Bay of Bengal branch is divided into two sub branches after striking eastern Himalayas. One branch moves towards the east-northeast direction and causes heavy rains in Brahmaputra valley and northeast hills of India.  
  • The other branch moves towards northwest along the Ganga valley and the Himalayan ranges causing heavy and widespread rains over vast areas.  
  • In this region, the amount of rainfall decreases from east to west owing to the progressive decrease in humidity of these winds. 

Source: NCERT – India Physical Environment