Land subsidence,a common geological phenomenon in deltaic regions,poses significant risks to infrastructures,environments,and human lives.Monitoring and understanding land subsidence are crucial for establishing resil...Land subsidence,a common geological phenomenon in deltaic regions,poses significant risks to infrastructures,environments,and human lives.Monitoring and understanding land subsidence are crucial for establishing resilient,adaptive,and sustainable environments.In this study,a robust multi-temporal interferometric synthetic aperture radar(MTInSAR)method was employed to monitor land subsidence in the Guangdong-Hong Kong-Macao Greater Bay Area(GBA)using 541 Sentinel-1 SAR images.Spatial auto-and cross-correlation analysis were applied to select the most reasonable explanatory variables from nine candidates in each city of the GBA.City-level geographically weighted regression(GWR)models were then constructed to explore the spatially nonstationary effects of natural and human-induced factors.The findings revealed subsidence velocities ranging from 0 to 83.7 mm/yr in the GBA from 2015 to 2021,with the dominant factors affecting subsidence varying among regions.Natural and human-related factors accounted for 51.13%and 48.87%,respectively.Further analysis of representative subsidence areas highlights the importance of continuous monitoring of ground deformation using MTInSAR,regionspecific land subsidence mitigation strategies,and regular maintenance of urban infrastructure.These insights are valuable for policymakers and urban planners in comprehending the complex processes underlying land subsidence and informing decision-making processes for sustainable and resilient urban development.展开更多
1 Introduction Environmental protection plays a critical role in ensuring the sustainable development of economies,particularly in developing countries where the balance between growth and ecological preservation is o...1 Introduction Environmental protection plays a critical role in ensuring the sustainable development of economies,particularly in developing countries where the balance between growth and ecological preservation is often delicate.Understanding the mechanisms behind environmental changes is essential for crafting informed policies that promote long-term environmental sustainability(Vitousek,1992;Kondratyev et al.,2002).展开更多
基金supported by the National Natural Science Foundation of China(41971278)the Research Grants Council(RGC)of Hong Kong(CUHK14223422,CUHK14201923 and AoE/E-603/18)+4 种基金CUHK Direct Grant for Research(4052294)In addition,Mei-Po Kwan was supported by grants from the Hong Kong Research Grants Council(General Research Fund Grant no.14605920,14611621,14606922Collaborative Research Fund Grant no.C4023-20GFResearch Matching Grants RMG 8601219,8601242)a grant from the Research Committee on Research Sustainability of Major Research Grants Council Funding Schemes(3133235)of the Chinese University of Hong Kong。
文摘Land subsidence,a common geological phenomenon in deltaic regions,poses significant risks to infrastructures,environments,and human lives.Monitoring and understanding land subsidence are crucial for establishing resilient,adaptive,and sustainable environments.In this study,a robust multi-temporal interferometric synthetic aperture radar(MTInSAR)method was employed to monitor land subsidence in the Guangdong-Hong Kong-Macao Greater Bay Area(GBA)using 541 Sentinel-1 SAR images.Spatial auto-and cross-correlation analysis were applied to select the most reasonable explanatory variables from nine candidates in each city of the GBA.City-level geographically weighted regression(GWR)models were then constructed to explore the spatially nonstationary effects of natural and human-induced factors.The findings revealed subsidence velocities ranging from 0 to 83.7 mm/yr in the GBA from 2015 to 2021,with the dominant factors affecting subsidence varying among regions.Natural and human-related factors accounted for 51.13%and 48.87%,respectively.Further analysis of representative subsidence areas highlights the importance of continuous monitoring of ground deformation using MTInSAR,regionspecific land subsidence mitigation strategies,and regular maintenance of urban infrastructure.These insights are valuable for policymakers and urban planners in comprehending the complex processes underlying land subsidence and informing decision-making processes for sustainable and resilient urban development.
基金supported by National Key R&D Program of China(Grant No.2021YFB3900400).
文摘1 Introduction Environmental protection plays a critical role in ensuring the sustainable development of economies,particularly in developing countries where the balance between growth and ecological preservation is often delicate.Understanding the mechanisms behind environmental changes is essential for crafting informed policies that promote long-term environmental sustainability(Vitousek,1992;Kondratyev et al.,2002).
