Morphological and Functional Polycentric Urbanization in Colombo Metropolitan of Sri Lanka Using Time-Series Satellite Images from 1988-2022

被引:1
作者
Fonseka, H. P. U. [1 ,2 ]
Premasiri, H. M. R. [1 ]
Chaminda, S. P. [1 ]
Zhang, Hongsheng [3 ,4 ]
机构
[1] Univ Moratuwa, Fac Engn, Dept Earth Resource Engn, Moratuwa 10400, Sri Lanka
[2] Arthur C Clarke Inst Modern Technol, Moratuwa 10400, Sri Lanka
[3] Univ Hong Kong, Dept Geog, Hong Kong 999077, Peoples R China
[4] Univ Hong Kong, Shenzhen Inst Res & Innovat, Shenzhen 518057, Peoples R China
基金
中国国家自然科学基金;
关键词
polycentric; spatial evaluation; temporal evaluation; morphological dimension; functional dimension; SPARSE REPRESENTATION; URBAN-DEVELOPMENT; CHINA; EXPANSION; PATTERNS; GROWTH;
D O I
10.3390/su16177816
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Examining urban growth in metropolitan areas from both morphological and functional perspectives is paramount for sustainable development in developing and developed countries. As a collaborative and critical approach, polycentrism operates concurrently at local, regional, and national levels. However, the decentralized morphologies and functional attributes of polycentric urban spaces are yet to be adequately explored, despite their significant influence on sustainable urban planning and management. Colombo, the only metropolitan area in Sri Lanka, has experienced considerable yet ambiguously imbalanced spatial growth due to insufficient data. This study employed time-series satellite imagery from 1988 to 2022, in conjunction with a network model, to elucidate Colombo's uneven urban patterns, while achieving an accuracy of over 80% throughout the period. The results revealed that the metropolis has evolved into a polynuclear city, complicating the identification of centers and their corresponding developmental stages. Nevertheless, the study successfully pinpointed the morphological and functional Grama Niladhari divisions, disclosing the morphological features of centralized dispersion and the functional traits of decentralized concentration. These insights provide significant implications for local government, guiding urban planning initiatives to achieve sustainable development goals.
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页数:17
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