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首页> 外文期刊>Bulletin of Pure & Applied Sciences, Section F. Geology: An International Research Journal of Geological Sciences >Effect of Channel Width Contraction at Bogibeel Bridge Site on the Morphology of the River Brahmaputra
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Effect of Channel Width Contraction at Bogibeel Bridge Site on the Morphology of the River Brahmaputra

机译：河道桥梁桥梁桥梁现场对渤海河河形态的影响

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摘要

The purpose of construction of bridge over the river or stream is to ensure and facilitate the smooth communication over the waterways.However,in certain engineering designs of bridge,a significant portion of waterway is occupied by the piers placed on the river bed and approach road build on the river bed.This results the constriction of the natural waterway.When the waterway is constricted because of the construction of bridges,it results detrimental effects on the morphology of the streams.The major consideration of the paper is to study the effect of constriction of the natural waterway on the river bank morphology and river island due to bridge construction.In this study,4.94 km long Bogibeel Bridge constructed over the river Brahmaputra is taken into consideration to study the morphological changes in its upstream and downstream portion of the river reach due to the constriction of the waterway.With the completion of the construction of the piers and approach road of Bogibeel Bridge,some significant morphological changes have already been observed.The satellite imageries of the area over two decade clearly indicates the changes that took place in the river bank morphology due to the construction of the bridge structure on the river bed.Some significant gradual modification in the river bank as well as on the permanent river island is identifiable with the progress of the bridge construction.The portions of the river bank which recede alarmingly due to changes in the configuration of the river channel have been identified to take up effective and sustainable measures to reduce or stop the current erosion.
机译：在河流或溪流上建造桥梁的目的是确保并促进水道上的平稳通信。然而，在某些工程设计的桥梁中，一部分的水路被位于河床和接近道路上的码头占据在河床上。结果是天然水道的收缩。由于水道因桥梁的建造而受到限制，它会导致对流的形态产生不利影响。本文的主要考虑是研究效果桥梁建设河岸形态学和河岛的自然水路的收缩。本研究，4.94公里长的Brahmaputra建造了河河上游和下游部分的形态变化由于水道的收缩而达到。在完成码头的建设和博吉的方法之路DGE，已经观察到一些显着的形态变化。该地区的卫星成像在二十多年上的成像清楚地表明，由于河床上的桥梁结构建设，河流形态发生的变化。有些显着的修改河岸以及常任河岛上是可识别的桥梁建设的可识别。由于河流渠道配置的变化，河岸的一部分令人担忧的是，占据了有效和可持续的措施减少或阻止当前的侵蚀。

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