基于空间指数和可持续发展目标指标的孟加拉国主要城市城市环境变化检测

IF 3.9 2区 社会学 Q1 URBAN STUDIES
Sumya Tasnim , Farzana Mahbub , Gopa Biswas , Dewan Mohammad Enamul Haque
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引用次数: 1

摘要

了解城市的增长趋势和相关的环境变化情景对于通过维持生态系统健康来确保城市人口的生活质量是必要的。我们在利用遥感技术分析城市指数的基础上,对孟加拉国主要城市进行了城市环境变化检测。通过估算可持续发展目标指标11.3.1,我们进一步将这些指数衍生的结果与可持续发展目标(SDG)第11项(可持续城市和社区)联系起来。这一指标涉及城市土地消耗率与人口增长率的比率。我们计算了达卡、吉大港、锡尔赫特和库尔纳这四个孟加拉国主要城市的不透水面面积(ISA)、植被分数(VF)和生物群落面积比(BAR)。我们还估算了归一化城市面积综合指数(NAUCI),因为NAUCI利用了其他相关的预先建立的指数,如NDVI、NDWI和NDBI的进一步信息。这些广泛使用的指数也是必须考虑的,因为这些指数也与土地消耗和人口增长直接相关。在这里,我们发现每个被考虑的城市都在以更快的速度扩张。因此,就可持续发展目标11.3.1而言,城市环境的生态正在退化,城市状况正在恶化。达卡、吉大港和锡尔赫特的可持续发展目标指标呈下降趋势,而库尔纳市则相反;然而,我们发现库尔纳的城市发展和其他被调查的城市一样,也在损害生态。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Spatial indices and SDG indicator-based urban environmental change detection of the major cities in Bangladesh

Understanding a city's urban growth trend and associated environmental change scenarios is necessary to ensure the quality of life of urban people by sustaining ecosystem health. We have performed urban environmental change detection for the major cities in Bangladesh based on the analysis of urban indices using remote sensing techniques. We have further correlated these indices-derived outcomes with Sustainable Development Goal (SDG) number 11 (sustainable cities and communities) by estimating the SDG indicator 11.3.1. This indicator deals with the urban land consumption rate ratio to the population growth rate. We calculated the Impervious Surface Area (ISA), Vegetation Fraction (VF), and Biotope Area Ratio (BAR) for Dhaka, Chittagong, Sylhet, and Khulna-the four major cities in Bangladesh. We have also estimated the Normalized Urban Area Composite Index (NAUCI) as NAUCI utilizes further information from other pertinent pre-established indices like NDVI, NDWI, and NDBI. These widely used indices are also essential to consider because these indicators are also directly related to land consumption and population growth. Here we find that each of the considered cities is expanding significantly faster. Therefore, the ecology of the urban environment is degrading as well as the cities' conditions are worsening in terms of SDG 11.3.1. Dhaka, Chittagong, and Sylhet exhibit a lowering trend of the SDG indicator, whereas Khulna city show the opposite; however, we found Khulna's urban growth like the other cities under investigation is harming the ecology too.

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来源期刊
CiteScore
9.50
自引率
4.90%
发文量
45
审稿时长
65 days
期刊介绍: Journal of Urban Management (JUM) is the Official Journal of Zhejiang University and the Chinese Association of Urban Management, an international, peer-reviewed open access journal covering planning, administering, regulating, and governing urban complexity. JUM has its two-fold aims set to integrate the studies across fields in urban planning and management, as well as to provide a more holistic perspective on problem solving. 1) Explore innovative management skills for taming thorny problems that arise with global urbanization 2) Provide a platform to deal with urban affairs whose solutions must be looked at from an interdisciplinary perspective.
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