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首页> 外文期刊>Universal Journal of Geoscience >Assessment of Fluvial Channel Dynamics of Padma River in Northwestern Bangladesh
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Assessment of Fluvial Channel Dynamics of Padma River in Northwestern Bangladesh

机译：孟加拉国西北部帕德玛河河道动力学评价

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摘要

Fluvial channel form and its dynamics over the period of time have been a major interest of study in fluvial geomorphology. The present study deals with the fluvial morphological characteristics of the Padma River in northwestern Bangladesh. Morphological and morpho-dynamic maps of the Padma River were prepared using remote sensing techniques. Sinuosity ratio, braided index and island percentage of the study area were estimated for the year of 1977, 1989 and 2000 respectively. Results showed a remarkable change in position of bank and channel as well as bars along with their geometry and morphology over time. Result also demonstrates that the bank line is unstable and migrated continuously towards westward in the recent decades. In addition, the study reveals that overall width of the Padma River is varied significantly during the last 23 years. Different maps and Landsat images (band 4) depict that the river shifting is abnormal which is alarming for the existence of the study area people. Outcomes of this study obtained from investigating satellite remote sensing imagery provide valuable information about the bank erosion and channel shifting of fluvial morphology of the Padma River and to recommend some protective measures.
机译：河道形式及其在一段时间内的动力学一直是河道地貌研究的主要兴趣。本研究涉及孟加拉西北部帕德玛河的河流形态特征。使用遥感技术绘制了帕德玛河的形态和形态动力学图。分别估算了1977年，1989年和2000年的研究区域的信度比，编织指数和岛屿百分比。结果显示，随着时间的推移，堤岸和河道以及钢筋的位置及其几何形状和形态发生了显着变化。结果还表明，近几十年来，河岸线是不稳定的，并不断向西迁移。此外，研究表明，帕德玛河的总宽度在过去23年中变化很大。不同的地图和Landsat图像（波段4）描述了河流转移异常，这警告了研究地区人们的存在。通过研究卫星遥感影像获得的这项研究结果提供了有关帕德玛河河岸侵蚀和河流形态的河道平移的有价值的信息，并提出了一些保护措施。

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