Land Subsidence in Xiong’ an New Area, China Revealed by InSAR Observa-tions

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In 2017, China’ s central government approved the national strategy to build Xiong’ an New Area ( XNA, 100 km southwest to Beijing), which was announced as a“millennium strategy”and a“demo area”for a sustainable, modern, and innovative urban model. Xiong’ an will draw in as much as $380 billion investment and is expected to help accelerate the development of the wider Beijing-Tianjin-Hebei ( Jingjinji ) Area. In this paper, present subsidence in the XNA area is investigated using InSAR observations for the first time. The 24 SAR images acquired by European Space Agency’ s Sentinel-1 satellites during the period from June 2017 to July 2018 suggest that in the north of Xiong County, the subsidence rate reaches up to 90 mm/y, which is highly correlated with the exploitation of geothermal drilling. As the construction in the XNA area will significantly accelerate and its high-quality development, the InSAR findings could provide valuable information for future sustainable urban planning and underground infrastructure construction.
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