Question

Describe the distribution of population in the Ganga Plain and explain how it is influenced by rainfall.

Answer 1

The Ganga Plain, a prominent part of the Indo-Gangetic Plain, is one of the most densely populated regions not just in India but globally. It spans across several states, including Uttar Pradesh, Bihar, West Bengal, and parts of Haryana and Delhi.

Distribution of Population in the Ganga Plain:

1. High-Density Areas: The central and eastern parts of the Ganga Plain, especially in eastern Uttar Pradesh, northern Bihar, and West Bengal, have extremely high population densities, often exceeding 1,000 persons per square kilometer. Major urban centers like Delhi, Kanpur, Lucknow, Varanasi, Patna, and Kolkata attract large populations due to economic opportunities and better infrastructure.

2. Moderate to Low Density Areas: The western parts, such as western Uttar Pradesh and southern Bihar, while still densely populated, are relatively less so compared to the eastern parts. Population density declines further as one moves towards the foothills of the Himalayas or into tribal-dominated areas of southern Bihar and northern Jharkhand.

Influence of Rainfall on Population Distribution: Rainfall significantly influences the pattern of population in the Ganga Plain through its impact on agriculture, which is the mainstay of the region's economy:

1. Adequate and Well-Distributed Rainfall: The Ganga Plain receives moderate to high rainfall (about 1,000–2,000 mm annually), mostly during the southwest monsoon. This ensures a steady supply of water for crops, especially rice and wheat, supporting intensive farming and high food production, which in turn supports dense populations.
2. Multiple Cropping and Irrigation: Consistent rainfall combined with fertile alluvial soil enables multiple cropping seasons. In areas where rainfall is slightly less reliable, extensive irrigation facilities (like in Punjab and western Uttar Pradesh) help maintain agricultural productivity.
3. Floods and Waterlogging: In the eastern part of the plain, especially in northern Bihar and West Bengal, excessive rainfall sometimes leads to flooding and waterlogging, which can temporarily disrupt habitation and agriculture but does not significantly reduce population densities due to the otherwise fertile conditions.