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The breach site for the 2008 flood was in … The breach site for the 2008 flood was in Nepal, and most of the flood impacts there occurred in the Sunsari districts, with about 60,000 people affected. However, a few kilometers downstream, in India, about 3.3 million people were affected in Bihar (Supaul, Saharsa, Madhepura, Araria and Purnia districts). Neither the 1954 or 1966 Kosi Project Agreements addressed the issue of economic responsibility for disasters due to project failure. While flooding had been common along the river prior to the agreements, no mechanism was included to address future flood concerns, disaster response capacity, or economic outcomes or responsibility in case of infrastructure failure.
Additionally, the shifting path of the Kosi and powerful scouring and sedimentation patterns along the river have proved to be a greater challenge than originally envisioned by the engineers who developed the project. The flood control structures have altered the flood regime, but without constant monitoring and maintenance, they are likely to fail again. While the project altered the original flood risks in the region, it has had unintended outcomes that include high maintenance costs and increased risk of catastrophic flood due to structural failures. The Project Agreements address the need to provide maintenance for the structures, but did not identify or address specific needs or provide a mechanism for strong enforcement of the responsibilities of either party.t of the responsibilities of either party. +
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