Disaster Management - 2008 Bihar Flood

Introduction It was one of the virtually disastrous floods in the storey of Bihar, an free and densely populated state in India. A come apart in the Kosi embankment near the Indo-Nepal border (at Kusha in Nepal) occurred on 18 August 2008. The river changed course and affected the field of operations which hadnt experienced floods in many another(prenominal) decades. The flood affected over 2.3 underlying people in the Union part of Bihar. incident On 18 August 2008, laboured monsoon rains and poor maintenance caused a breach in the Kosi embankment. weewee passed through the breach at an estimated 129,800 m³/s, inundating hundreds of villages in northern Bihar. The flood submerged most of the Kosi alluvial fan area, which is real fertile, with a dense agricultural population. Background The Kosi Rivers speeding basin in southern Tibet and eastern Nepal has approximately 60,000 km² of mountainous terrain, a region that architectonic forces are elevating by about 1 cm a year. If erosion keeps pace with the uplift, an estimated 600 million three-dimensional meters of sediment is potentially carried downstream in an average year. However, verifiable measurements of the rivers sediment commove have given estimates of 100 million cubic meters annually, indicating that the area is rising.

River slope ranges from more than 10 meters/km for major upper tributaries in the mountains to as little as 6 cm/km as the inflict Kosi nears the  gang up. As the gradient decreases on the plains, current slows and turbulence that holds sediments in interruption diminishes. Sediments represent out and are deposited on the riverbed. This process finally raises a channel above the ! surrounding terrain. The river breaks out, seeking lower terrain, which it once again proceeds to elevate by deposition. This creates a conic alluvial fan. The Kosi alluvial fan is one of the largest in the world, coating some 15,000 km² and extending 180 km from the outermost foothills of the Himalayas to the Ganges river valley. binge waters naturally spread out...If you want to dismount a full essay, order it on our website: OrderEssay.net

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