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Assam and West Bengal: Bank erosion in the Brahmaputra valley–impact and causes by DHRUBA JYOTI BORGOHAIN August 01,2019   |  Source: NorthEast Now

The entire Brahmaputra valley is at present reeling under a devastating flood. The peak flow of the Brahmaputra during this wave of flood at Pandu was about 39000 cubic meters per sec (cumec). Statistically, this kind of flood is quite common and happens almost every 10 years. The highest ever recorded flow at Pandu is about 72000 cumec. It is difficult to imagine the kind of devastation such a flood may cause today. Lurking behind this flood is its twin brother – the erosion waiting to strike once the flood recedes. It is even a more serious problem than floods in the Brahmaputra valley. It causes immense damages to life and property. Farmers in the river bank are turned into paupers overnight through a permanent loss of their land. Unlike floods, which have many benefits as well, such as enriching the soil, recharge of groundwater, increased fish population, etc, erosion has no good side and is feared by everyone living on the river banks of the valley.

Complete and permanent immunity from erosion in Brahmaputra valley is a utopian concept. This is because the entire Brahmaputra valley is formed of river deposits (alluviums) brought down by the river and its tributaries. Changes in a river course through erosion and deposition in its alluvial plain is a natural process

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