Q101. Which of the following is the primary cause of the rain shadow effect in the Western Ghats region of India?
- (a) The Himalayas blocking the monsoon winds
- (b) The Western Ghats intercepting moisture-laden winds from the Arabian Sea
- (c) The Thar Desert drawing moisture from the monsoon winds
- (d) The Deccan Plateau blocking winds from the Bay of Bengal
Answer & solution
Answer: (b) The Western Ghats intercepting moisture-laden winds from the Arabian Sea
The Western Ghats act as a barrier to the southwest monsoon winds blowing in from the Arabian Sea. The windward (western) slopes receive heavy rainfall, while the leeward (eastern) side – the Deccan Plateau – remains dry. This dry region on the leeward side is called the rain shadow zone.
Option 1 (Himalayas blocking monsoon): The Himalayas affect the northern Indian plains; they are not the cause of the Western Ghats rain shadow.
Option 3 (Thar Desert drawing moisture): The Thar Desert is itself a result of low rainfall; it does not cause the rain shadow of the Western Ghats.
Option 4 (Deccan Plateau blocking Bay of Bengal winds): The Deccan Plateau is on the leeward side; it doesn't block Arabian Sea winds.