Question

"Devastating floods occur in Brahmaputra river during monsoon: give reason​

Answer 1

Explanation:

During the summer monsoon months June-September, the Brahmaputra River experiences severe floods that occur year after year causing death and destruction in the Assam Valley and neighbouring Bangladesh. During the period 1987-1998, flood data of 21 gauge/discharge sites on the main Brahmaputra River and its 12 major tributaries have been studied with a view to discovering which sites and tributaries experience frequent floods in different monsoon months and how high flood magnitudes are. It is hoped that this study may be useful to planners and water resources engineers for taking the remedial measures against recurring floods in this region.

Answer 2

Explanation:

The Brahmaputra basin is one of the largest river basins in the northeast region of India, i.e. Assam andneighbourhood. This is the region of highest rainfall in India. The main meteorological situations thatcause heavy rainstorms over the Brahmaputra basin are due to the shifting of the eastern end of theseasonal monsoon trough to the foothills of Himalayas in the north and ‘Break’ monsoon situationsduring the monsoon season. The mean annual rainfall over this region is of the order of 250 cm (IMD,1971) with a low co-efficient of variability, this being of the order of 10–15%.

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