Neighborhood dynamics of urban expansion based on morphological spatial pattern analysis and geospatial techniques: a case study of the Colombo metropolitan area, Sri Lanka
Neighborhood dynamics of urban expansion based on morphological spatial pattern analysis and geospatial techniques: a case study of the Colombo metropolitan area, Sri Lanka
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DOI：
10.1080/10225706.2021.1903519
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发表时间：
2021-03
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通讯作者：
S. Subasinghe;Ruci Wang;Matamyo Simwanda;Y. Murayama;L. L. Vitanova-L.
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作者：
S. Subasinghe;Ruci Wang;Matamyo Simwanda;Y. Murayama;L. L. Vitanova-L.
基于形态空间格局分析（MSPA）和地理空间技术，研究了1992 - 2014年斯里兰卡科伦坡大都市区（CMA）城市扩张的邻里动态。传统上，使用绝对土地利用/覆盖（LULC）术语和景观格局（即城市和非城市）来检测城市扩张。然而，用邻里规则来描述城市扩张的非传统特征可以更好地理解城市转型，这对城市规划者和管理者来说是必不可少的。因此，本研究利用1992年、2001年和2014年Landsat影像的MSPA，基于邻域规则对城市土地利用扩张进行分类和检测。城市扩张强度和拓扑结构（填充、延伸和跨越式）也被用于进一步分析。结果表明：1992 - 2014年，CMA经历了快速的城市扩张，总城市足迹增加了288%；2000年代城市扩张强度（1.45%）高于1990年代（0.95%）。城市扩张拓扑分析表明，在整个研究的时间范围内，跨越式扩张是最主要的扩张模式。从城市中心向外填充扩张，城市延伸沿主要交通走廊和沿海带呈带状发展。CMA地区城市扩张的模式和强度与斯里兰卡的经济、人口和政治变化直接相关。总体而言，该研究提高了对CMA中城市扩张的理解，并为未来的城市规划举措提供了可考虑的方向。
ABSTRACT This study examined neighborhood dynamics of urban expansion based on morphological spatial pattern analysis (MSPA) and geospatial techniques in the Colombo Metropolitan Area (CMA) of Sri Lanka from 1992 to 2014. Traditionally, urban expansion has been detected using absolute land use/cover (LULC) terms and landscape patterns (i.e. urban and non-urban). However, non-traditional characterization of urban expansion with neighborhood rules provides a better understanding of urban transformation which is essential to urban planners and managers. This study therefore used MSPA of Landsat images (1992, 2001 and 2014) to classify and detect the expansion of urban land uses based on neighborhood rules. Urban expansion intensity and topologies (infill, extension, and leapfrog) were also employed for further analysis. The results show that the CMA experienced rapid urban expansion, recording a 288% increase in the total urban footprint from 1992 to 2014. The annual urban expansion intensity was higher during the 2000s (1.45%) than during the 1990s (0.95%). Urban expansion topological analysis revealed that leapfrog was the most dominant pattern throughout the study’s temporal extent. An outward infill expansion from the city center was observed, while urban extension exhibited a ribbon-type development along the main transport corridors and coastal belts. The patterns and intensity of urban expansion in the CMA are directly linked to the economic, demographics, and political changes in Sri Lanka. Overall, the study provides an improved understanding of urban expansion in the CMA and offers directions that could be considered in future urban planning initiatives.