Investigating the drivers of urban cover-collapse sinkholes in shanghai:analyzing dominant factors and proposing mitigation strategies  

作　　者：Bing Li Hanmei Wang Hang Tang 

机构地区：[1]Shanghai Institute of Geological Survey,Shanghai 200072,China [2]Key Laboratory of Land Subsidence Monitoring and Prevention of Ministry of Natural Resources,Shanghai 200072,China

出　　处：《Anthropocene Coasts》2024年第1期259-265,共7页人新世海岸(英文)

基　　金：funded by the Shanghai Science and Technology Commission(project num.19DZ1200902);National Natural Science Foundation of China(Grant No.42076081).

摘　　要：Urban cover-collapse sinkholes pose a significant global challenge due to their destructive impacts.Previous studies have identified groundwater fluctuations,subsurface soil conditions,pipeline leakage,precipitation,and subterranean construction activities as key contributors to these phenomena.However,unique geological settings across different urban environments lead to variations in the primary factors influencing sinkhole formation.This study focuses on Shanghai,a city notable for its extensive urbanization and rich historical context,to explore the dynamics of sinkholes within urbanized areas worldwide.We employ spatial analysis and statistical methods to examine data on sinkholes recorded in the past two decades in Shanghai,correlating these events with the city’s shallow sand layer,ground elevation,and proximity to surface water.Our goal is to identify the dominant factors governing sinkhole occurrence in Shanghai and to lay the groundwork for their effective scientific management and prevention.Key findings indicate that most sinkholes in the area are associated with a thin shallow sand layer,low to moderate ground elevations,and the absence of nearby rivers.Additionally,many sinkholes correlate with subterranean voids within the confined aquifer beneath the cohesive soil layer.The lack of historical river channels,obscured by urban development,also indirectly contributes to sinkhole formation.We recommend enhancing urban river management and drainage systems to mitigate potential damage from water accumulation.

关 键 词：Cover-collapse Sinkhole Coastal urban area Controlling factor Digital Elevation Model(DEM) Shallow sand layer Groundwater 

分 类 号：F42[经济管理—产业经济]