With reference to the distribution of rainfall in India, which of the...
o There are two rain-bearing systems in India.
- First originates in the Bay of Bengal causing rainfall over the plains of north India.
- Second is the Arabian Sea current of the southwest monsoon which brings rain to the west coast of India.
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With reference to the distribution of rainfall in India, which of the...
Introduction:
The distribution of rainfall in India is influenced by various factors, including the oscillation of the axis of the monsoon trough. The intensity and amount of rainfall can vary across different regions of the country. In addition, there is a trend of declining rainfall from southeast to northwest in the North Indian plains.
Explanation:
1. Intensity and amount of rainfall vary with the oscillation of the axis of the monsoon trough:
The monsoon trough is a low-pressure zone that forms during the summer monsoon season in India. It is responsible for the majority of rainfall in the country. The axis of the monsoon trough oscillates between the northern and southern parts of India, bringing rainfall to different regions.
- When the axis of the monsoon trough is positioned closer to the northern parts of India, regions like Punjab, Haryana, and Rajasthan receive more rainfall.
- Conversely, when the axis of the monsoon trough shifts towards the southern parts of India, regions like Tamil Nadu, Andhra Pradesh, and Kerala receive more rainfall.
This oscillation of the monsoon trough's axis leads to variations in the intensity and amount of rainfall across different parts of the country.
2. Rains over North Indian plains show a declining trend from southeast to northwest:
The North Indian plains, which include states like Uttar Pradesh, Bihar, and West Bengal, experience a distinct pattern of rainfall distribution.
- In the southeastern parts of the North Indian plains, such as West Bengal and Odisha, the rainfall is relatively higher due to the proximity to the Bay of Bengal and the influence of the southwest monsoon winds.
- As we move towards the northwest, the rainfall gradually decreases. States like Punjab and Haryana receive less rainfall compared to the southeastern regions.
This declining trend in rainfall from southeast to northwest is attributed to factors such as the obstruction of the monsoon winds by the Himalayas and the influence of the arid regions of Rajasthan and Gujarat.
Conclusion:
Both statements are correct. The intensity and amount of rainfall in India vary with the oscillation of the axis of the monsoon trough. Additionally, there is a declining trend in rainfall from southeast to northwest in the North Indian plains. These factors contribute to the diverse distribution of rainfall across different regions of India.
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