The Brahmaputra becomes bigger in summer due to melting Himalayan glaciers and heavy monsoon rains. Unlike rivers that shrink, its water level rises, often causing floods. It carries sediment and supports agriculture, wetlands and biodiversity across Assam and nearby northeastern regions.
Class 7 Social Science Exploring Society: India and Beyond
Class 7 Social Science Chapter 1 Geographical Diversity of India question answer
The Brahmaputra River expands during summer because of two reasons: glacial melt from the Himalayas and intense monsoon rainfall in the northeast. As temperatures rise, snow and ice melt rapidly, adding water to the river. Unlike rivers that dry up, the Brahmaputra overflows, sometimes flooding the plains of Assam. This seasonal swelling enriches soil through sediment deposits, supports agriculture and replenishes wetlands. Though helpful, the floods can also damage homes and displace people in low-lying areas.
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