西南沿海地区的地貌变化评估：以孟加拉国巴格哈特的Mongla Upazila为例

IF 1.4 Q4 WATER RESOURCES

Journal of Applied Water Engineering and Research Pub Date : 2020-11-03 DOI:10.1080/23249676.2020.1831977

M. Hasan, S. Karmaker, M. R. Rahman

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引用次数: 4

摘要

由于其动态特征，西南沿海地区的侵蚀和海岸线变化率较高。本研究旨在通过卫星图像观测来评估巴格哈特蒙格拉的地貌变化。2000年至2018年使用ArcGIS软件中的归一化差异水指数（NDWI）和图像分类方法进行的研究。根据对多光谱卫星图像的分析，表明在过去18年中，约22.57平方公里的土地面积被连续侵蚀，并测量了土地和水的面积差异。海岸线的变化表明，在一些脆弱的横截面中，大约有366 m面积为位移。尽管如此，该地区位于潮汐带，但桑德兰的海洋相连地区和人口稠密地区的较低地区大多面临地貌变化的影响。

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Geomorphological change assessment of south western coastal region: a case study of Mongla Upazila, Bagerhat, Bangladesh

Erosion and shoreline changes are found at a higher rate in the southwestern coastal area due to its dynamic characteristics. The present study aims to evaluate the geomorphological changes through observations of satellite imagery in Mongla, Bagerhat. Study conducted from the years of 2000–2018 using the Normalized Difference Water Index (NDWI) and image classification method in ArcGIS software. According to the analysis of multispectral satellite imagery, it is revealed that about 22.57 km2 land area eroded consecutively over the last 18 years as well as the areal difference of land and water measured. Changes of shorelines figure out that in some vulnerable cross-sections about 366 m area is displacement. Though, this area located in the tidal zone but ocean connected areas of Sunderbans and lower regions of the populated area faced mostly the effect of geomorphological changes.

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来源期刊

Journal of Applied Water Engineering and Research WATER RESOURCES-

CiteScore

2.90

自引率

16.70%

发文量

期刊介绍： JAWER’s paradigm-changing (online only) articles provide directly applicable solutions to water engineering problems within the whole hydrosphere (rivers, lakes groundwater, estuaries, coastal and marine waters) covering areas such as: integrated water resources management and catchment hydraulics hydraulic machinery and structures hydraulics applied to water supply, treatment and drainage systems (including outfalls) water quality, security and governance in an engineering context environmental monitoring maritime hydraulics ecohydraulics flood risk modelling and management water related hazards desalination and re-use.