城市化对孟加拉国土地覆盖格局的影响——以Chuadanga地区为例

S. Mahfuza, Hossain, M. Islam
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引用次数: 2

摘要

过去几年来,孟加拉国一直面临着迅速和无计划的城市化,导致该地区的植被、淡水水体和裸露的土壤发生毁灭性变化。本综合研究旨在了解孟加拉国西部川丹加地区城市化和土地覆盖变化的趋势。这种缩小的方法使用GIS和遥感技术对过去五年(2014-2018年)的Landsat图像进行监督土地覆盖分类。研究表明,该区建筑面积和裸露土壤呈增加趋势,植被和水体呈减少趋势。同时发现,在此期间,建成区面积与植被覆盖的变化呈强相关,建成区面积增加了1.28% (14.84 sq.km),植被减少了16.54% (191.96 sq.km)。此外,城区的快速增长对水体和裸土的减少以及城市化即将到来的变化格局也产生了相当大的影响。这项研究表明,城市扩张对于实现可持续发展目标(SDG),特别是目标11“可持续城市”的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Impacts of Urbanization on Land Cover Pattern in Bangladesh: A Downscaled Approach for Chuadanga District
Bangladesh has been facing rapid and unplanned urbanization for last several years resulting devastating change to vegetation, fresh water body and bare soil in this area. This integrated study aimed to find out the trend of urbanization and land cover changes in Chuandanga, a western district of Bangladesh. This downscaled approach used GIS and remote sensing techniques for supervised land cover classification of Landsat images for last five years (2014-2018). The study has portrayed an increasing trend in built up area and bare soil whereas a decreasing trend in vegetation and water body. Meanwhile, it has been found that change in built up area and vegetation cover is strongly correlated whilst built area is increased by 1.28% (14.84 sq.km) and vegetation decreased by 16.54% (191.96 sq.km) during this period. Moreover, it is also observed that rapid growth of urban areas has a considerable influence on decreasing water body and bare soil as well as the changing pattern showing the forthcoming urbanization in this city. This study shows the importance of urban expansion for achieving Sustainable Development Goals (SDG) in particular Goal 11, Sustainable Cities.
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