Mapping Urban Expansion and Exploring Its Driving Forces in the City of Praia, Cape Verde, from 1969 to 2015

Mapping Urban Expansion and Exploring Its Driving Forces in the City of Praia, Cape Verde, from 1969 to 2015
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绘制佛得角普拉亚市 1969 年至 2015 年的城市扩张图并探索其驱动力

DOI:
10.3390/su9081434
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发表时间:
2017-08
期刊:
影响因子:
3.9
通讯作者:
Li Lin
Li Lin
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Silva Patrik;Li Lin

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城市扩张是人类在一定自然环境中密集活动的结果,可能造成生态和环境问题,特别是在土地资源稀缺的小岛屿上。普拉亚是佛得角的首都,位于这样一个岛上。了解城市扩展将为城市规划和政策制定提供良好的知识,以平衡城市经济发展和自然资源保护。根据现有数据,1969年至2015年普拉亚的城市扩张分为四个阶段(1969-1993年,1993-2003年,2003-2010年和2010-2015年)。为了整合不同的数据源,本研究采用了一种有效的方法来协调和校准不同比例尺和形式的地图数据到一个一致的数据集,然后介绍了一些改进的城市区域划定。在此基础上,运用回归分析方法对各阶段的城市扩展驱动力进行了分析,揭示了城市扩展的主要过程。我们发现,在2003年之后,城市扩张的年增长率(AGR)下降,城市利用密度(UD)和人均土地消耗(LCR)的平行稳定。这项研究还表明,人口并不总是城市扩张的持续驱动因素,大多数横向扩张发生在基础设施较少的地区。
Urban expansion is the outcome of intensive human activity within a certain natural environment and may cause ecological and environmental problems, especially on small islands where land is a scarce resource. Praia is the capital city of Cape Verde, located on such an island. Understanding urban expansion will provide good knowledge for urban planning and policy making in balancing urban economic development and natural resource protection. According to available data, the urban expansion in Praia between 1969 and 2015 is observed in four phases (1969–1993, 1993–2003, 2003–2010, and 2010–2015). In order to integrate various data sources, this study applies an available method to coordinate and calibrate map data with different scales and forms into a consistent dataset and then introduces some improvements in the delineation of urban areas. With this data, the driving forces in each phase are explored using regression analysis, by which the main urban expansion processes are presented. We found a decrease in annual growth rate (AGR) of urban expansion after the year 2003 and a parallel stabilization of urban utilization density (UD) and land consumption per capita (LCR). This study also indicates that population is not always the persistent driving factor for urban expansion and the majority of horizontal expansion has occurred in zones with less infrastructure.
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