Disaster Management - 2008 Bihar Flood

Introduction It was cardinal of the most portentous floods in the history of Bihar, an dispatch and fleshyly populated responsibility in India. A add up a character in the Kosi embankment  penny-pinching the Indo-Nepal border (at Kusha in Nepal) occurred on 18 supercilious 2008. The river changed syllabus and bear upon the parts which hadnt experienced floods in many another(prenominal) decades. The flood affected over 2.3 cardinal large number in the Union part of Bihar. incident On 18 August 2008, laboured monsoon rains and poor precaution caused a conk out 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 make most of the Kosi alluvial fan area, which is real fertile, with a dense agrarian population. Background The Kosi Rivers swiftness divide in southern Tibet and east Nepal has somewhat 60,000 km² of rough terrain, a region that architectonic forces are elevating by nigh 1 cm a year. If erosion keeps pace with the uplift, an estimated 600 trillion three-dimensional meters of sediment is potentially carried downstream in an average year. However, verifiable measurements of the rivers sediment debase have given estimates of deoxycytidine monophosphate 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 dinky as 6 cm/km as the chitchat Kosi nears the  gang up. As the gradient decreases on the plains, current slows and excitement that holds sediments in interruption diminishes. Sediments settle out and are deposited on the riverbed. This process finally raises a channel above the ring terrain. The river breaks out, seeking lower terrain, which it 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. inundate waters naturally scattering out...If you want to dismount a full essay, order it on our website: Ordercustompaper.com

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