Disaster Management - 2008 Bihar Flood

Introduction It was one of the intimately disastrous floods in the biography 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 empyreans which hadnt experience floods in many another(prenominal) decades. The flood affected over 2.3 cardinal grosbeak 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 rural population. Background The Kosi Rivers pep pill basin in southern Tibet and easterly Nepal has close to 60,000 km² of mountainous terrain, a region that tectonic 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 dilute have given estimates of 100 million cubic meters annually, indicating that the area is rising. River gradient 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 specify 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 over 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. flood waters naturally spread out...If you want to dismount a full essay, order it on our website: OrderEssay.net

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