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. Land subsidence, as a surface response to thedevelopment, utilization and evolution of underground space, has become aglobal and multidisciplinary complex geological environment problem. Sincethe 1960s, land subsidence has been developing rapidly inthe Beijing Plain area. Against the backdrop of the integration of Beijing,Tianjin and Hebei in addition to “southern water” (South-to-North Water DiversionProject, SNWDP) entering Beijing, the systematic study of the evolutionmechanism of land subsidence is of great significance for the sustainable development of theregional economy. Firstly, this study used ENVISAT ASAR and RADARSAT-2 datato obtain surface deformation information for the Beijing Plain area from2004 to 2015 and then verified the results. Secondly, the study area was dividedinto units using a 960 m×960 m grid, and the ground settlement rate of eachgrid unit from 2004 to 2015 was obtained. Finally, the Mann–Kendall test wasperformed on the grid to obtain the mutation information for each grid unit.Combined with hydrogeology and basic geological conditions, we have attempted toanalyze the causes of the mutations in the grid. The results show that 2347grid cells were mutated in a single year, with most of these distributedacross the Yongding River alluvial fan and the middle and lower parts ofthe Chaobai River alluvial fan. A total of 1128 grid cells weremutated in multiple years, with the majority of these cells mainly distributed across theupper-middle area of the alluvial fan, near the emergency water source andat the edge of the groundwater funnel. This study aims to provide favorabletechnical support and a scientific basis for urban construction in Beijing.

Analysis of land subsidence changes on the Beijing Plain from 2004 to 2015