ISSN (Print) - 0012-9976 | ISSN (Online) - 2349-8846

Bihar FloodsSubscribe to Bihar Floods

The Kosi and the Embankment Story

The Kosi afflux bundh breached in Kusaha in Nepal on 18 August 2008. This was the eighth incident of its kind and the first time did a breach occur upstream of the Kosi Barrage. The ones in 1968 and 1984 were no less disastrous but this year's breach has generated the most concern and its international dimension has added an edge. In an effective life of 45 years, the embankments have remained intact for 37 years. What happens to the people who have suffered the wrath of the river nearly five times more than those in the areas protected by the embankments?

Management of Floods in Bihar

A combination of short- and long-term measures that gives importance to both structural (traditional) means and non-structural techniques is required to solve the perennial flood problem in north Bihar.

Kosi: Rising Waters, Dynamic Channels and Human Disasters

The recent Kosi floods have proved once again that inadequate control measures have been responsible for the recurring disasters. Typically flood control and riverine studies focus on hydrological information, whereas a much more integrated approach that pays attention to specific morphological factors is required. Since Kosi is a dynamic river with a unique morphology and because it is a river which has always carried high sediment loads, flood management strategies must be attuned to such specific parameters of the river, besides being much more than mere "river control" through embankments.

Floods, Himalayan Rivers, Nepal: Some Heresies

The strategy of building embankments to constrain river flow and to prevent floods in north Bihar has proven to be questionable and flawed. Reliance on a dam-and-reservoir system for that purpose only offers limited protection and even greater risks of flooding in case of damage. Learning to cope with floods and managing a transition to a system that does not rely upon the embankments any more seems to be the rational course of action.
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