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This is an archive article published on September 14, 2007

High sediment load has made Brahmaputra flood-prone: experts

Two major rivers of Assam, the Brahmaputra and the Barak, are highly flood-prone, said sources in the Assam Water Resource Department...

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Two major rivers of Assam, the Brahmaputra and the Barak, are highly flood-prone, said sources in the Assam Water Resource Department on Thursday.

The Water Resource Department officials said the rivers flowing from the Eastern Himalayas are swifter and carry more sediment compared to those originating from Nagaland, Meghalaya or Manipur. 8220;Owing to increased deforestation and dam construction work, the rivers carry heavy quantities of sand, leading to increased erosion,8221; an official in the department said.

While the Brahmaputra bed has risen due to the earthquake that struck the territory in 1950, the increased sediment load has further disturbed the natural flow of the river. Officials are, however, concerned over the alarming rate at which the silt is flowing into the Brahmaputra from its tributaries, especially from Bhutan and Arunachal Pradesh.

8220;The bed load of sediments at Pandu in Guwahati is found to be between five and 15 per cent of the total load of the river,8221; said J N Sarma of the Department of Applied Geology at Dibrugarh University, indicating how much of the river8217;s natural capacity has been occupied by silt.

 

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