Question

3. Why does the rainfall decrease from the east to the west in Northern India?
4. Give reasons as to why.
(i) Seasonal reversal of wind direction takes place over the Indian subcontinent?
(ii) The bulk of rainfall in India is concentrated over a few months.
(iii) The Tamil Nadu coast receives winter rainfall.
(iv) The delta region of the eastern coast is frequently struck by cyclones.
(v) Parts of Rajasthan, Gujarat and the leeward side of the Western Ghats are drought-prone.

Answer 1

3. As they move in the direction, the winds lose the moisture content. Hence the reason for the reduction in rainfall.

4.(i)

1. Seasonal change in wind direction due to pressure difference.

2. El-Nino plays a major role.

(ii) Rainfall is dependent on the South West Monsoon winds, it rapidly progresses and covers large swathes of the country by July.

(iii) It is because of North-East monsoon winds.

(iv) The Bay of Bengal faces frequent pressure changes.

(v) Because they fall in the rain shadow region of Aravali Mountains.