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首页> 外文期刊>International Journal of Geomatics and Geosciences >Application of Remote Sensing and GIS in studying changing river course in Bankura District, West Bengal
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Application of Remote Sensing and GIS in studying changing river course in Bankura District, West Bengal

机译：遥感和GIS在西孟加拉邦班库拉地区研究河道变化中的应用

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Remote Sensing and Geographical Information System has emerged as the most important tool of a geographer to handle spatial data. This technique is now widely used around the world to analyse physical as well as cultural geographical elements. Change in the alignment and course of streams is one such area where such a sophisticated technique can be applied fruitfully, the results of which are utilized in several regional planning occasions. Drainage system of an area is a dynamic system of the earth which always keep on changing in response to the changes in the earth-atmosphere system. The present study deals with the changes occurred in the drainage system of Bankura district- its morphology and alignment as well as its adjustment with underlying structure. Bankura district is the connecting link between the western upland and eastern alluvial tract of West Bengal. The district is located between 220? 38′ N and 230? 38′ N latitude and between 860? 36′ E and 870? 46′ E longitude, covering an area of about 6882 sq. Km (DSH, Bankura, 2006). This isosceles triangle look district is geologically a portion of eastern extension of Chhotanagpur plateau. Thus it has a very long geological history. Consequently, the evolution of drainage in this area has passed through long period of denudation. Rivers always undergone through change in its shapes and alignment by continuous changing their hydrodynamic and morphodynamic processes, depending upon the slope, terrain characteristics, structural parameters, vegetal cover with due course of time. For the present study, topographical maps, satellite images (MSS and ETM+) of different dates and the google earth image of 2011 are analysed using RS-GIS softwares. The results obtained from these analyses are then overlaid one upon another and the change in alignment of each course is determined on the basis of various channel morphological parameters such as sinuosity index, cross valley asymmetry, meander ratio, entrenchment ratio and other morphological characters.
机译：遥感和地理信息系统已经成为地理学家处理空间数据的最重要工具。现在，该技术已在世界范围内广泛用于分析物理和文化地理元素。溪流的路线和路线的变化就是这样一种领域，在这种领域中，可以成功地应用这种复杂的技术，其结果在多个区域规划场合中得到利用。一个地区的排水系统是地球的一个动态系统，它总是随着地球-大气系统的变化而不断变化。本研究探讨了班库拉地区排水系统中发生的变化-其形态和路线以及对底层结构的调整。班库拉区是西部高地与西孟加拉邦东部冲积道之间的连接点。该区位于220之间？ 38′N和230？ 38'N纬度和860之间？ 36′E和870？经度46'，占地约6882平方公里（DSH，班库拉，2006年）。这个等腰三角形的外观区域在地质上是Chhotanagpur高原东部延伸的一部分。因此它具有很长的地质历史。因此，该地区排水的演变经历了长期的剥蚀。河流的形状和路线总是不断变化，取决于坡度，地形特征，结构参数和植被覆盖，并随着时间的推移不断变化其水动力和形态动力过程。对于本研究，使用RS-GIS软件分析了地形图，不同日期的卫星图像（MSS和ETM +）以及2011年的Google地球图像。然后将这些分析获得的结果相互叠加，并根据各种通道的形态参数（如波度指数，跨谷不对称性，曲折率，夹带率和其他形态特征）确定每个航向的路线变化。

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