What is the primary source of flooding for the Brahmaputra River?

The primary source of flooding for the Brahmaputra River is predominantly influenced by seasonal rain rather than glacial melt. The river basin experiences heavy monsoon rains during the summer months, particularly between June and September. This influx of rainfall can lead to significant river swelling and subsequent flooding, as the river is unable to contain the volume of water.

While glacial melt occurs in the Himalayas and contributes to river flow, especially during warmer months, it does not produce the same immediate and widespread flooding effects that the intense seasonal rains do. The impact of monsoon rains on the Brahmaputra is compounded by its drainage basin's topography, leading to rapid accumulation of water and floods in the river's low-lying areas.

Human activity can exacerbate flood conditions through urbanization and deforestation, but it is not the primary source of flooding in this context. In summary, the seasonal rains during the monsoon are the main drivers of flooding in the Brahmaputra River, making it the most significant contributor to flood events in the region.