Morphological changes of river Bank Erosion and channel shifting assessment on Arial Khan River of Bangladesh using Landsat satellite time series images

IF 2.6 Q3 ENVIRONMENTAL SCIENCES

Progress in Disaster Science Pub Date : 2024-10-18 DOI:10.1016/j.pdisas.2024.100381

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引用次数: 0

Abstract

The continuous processes of erosion and deposition in rivers are intricately linked to changes in land use and land cover (LULC), reflecting dynamic landscape transformations. This study investigates the rate of riverbank erosion, channel shifting, and the impact of erosion on LULC dynamics along the Arial Khan River. Utilizing GIS and remote sensing techniques, we analyzed time-series satellite images from 1993 to 2024 within a 2 km buffer zone of the floodplain. Supervised classification methods were applied for LULC analysis, with results validated using confusion matrices to assess classification accuracy. ArcGIS 10.8 was employed to analyze channel centerline migration, while NDVI analysis assessed vegetation health. The study reveals that between 1993 and 2024, 5142.60 ha were lost to erosion, while deposition affected 4756.52 ha, with erosion surpassing deposition overall. The river shifted an average of 0.66 km during this period, with higher migration rates in Muladi Upazila compared to Babuganj Upazila. Settlement areas expanded significantly from 137.82 ha in 1993 to 2768.68 ha in 2024, while agricultural land declined substantially. These findings provide valuable insights for policymakers to address erosion severity in confluence zones and lay the groundwork for sustainable land management practices.

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利用 Landsat 卫星时间序列图像评估孟加拉国 Arial Khan 河河岸侵蚀和河道移动的形态变化

河流中持续不断的侵蚀和沉积过程与土地利用和土地覆盖（LULC）的变化密切相关，反映了景观的动态变化。本研究调查了阿里亚汗河沿岸的河岸侵蚀速度、河道移动以及侵蚀对 LULC 动态变化的影响。利用地理信息系统和遥感技术，我们分析了洪泛区 2 公里缓冲带内 1993 年至 2024 年的时间序列卫星图像。在 LULC 分析中采用了监督分类方法，并使用混淆矩阵对结果进行验证，以评估分类的准确性。ArcGIS 10.8 用于分析河道中心线的迁移，而 NDVI 分析则用于评估植被健康状况。研究显示，1993 年至 2024 年间，侵蚀损失了 5142.60 公顷，而沉积影响了 4756.52 公顷，侵蚀总体上超过了沉积。在此期间，河流平均移动了 0.66 公里，与巴布甘吉乡相比，穆拉迪乡的迁移率更高。居住区面积从 1993 年的 137.82 公顷大幅扩大到 2024 年的 2768.68 公顷，而农业用地却大幅减少。这些发现为决策者解决汇流区水土流失严重问题提供了宝贵的见解，并为可持续土地管理实践奠定了基础。

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来源期刊

Progress in Disaster Science Social Sciences-Safety Research

CiteScore

14.60

自引率

3.20%

发文量

审稿时长

12 weeks

期刊介绍： Progress in Disaster Science is a Gold Open Access journal focusing on integrating research and policy in disaster research, and publishes original research papers and invited viewpoint articles on disaster risk reduction; response; emergency management and recovery. A key part of the Journal's Publication output will see key experts invited to assess and comment on the current trends in disaster research, as well as highlight key papers.