Evaluating Potential Ground Subsidence Geo-Hazard of Xiamen Xiang’an New Airport on Reclaimed Land by SAR Interferometry

Guanchen Zhuo, Keren Dai, Huina Huang, Shengpeng Li, Xianlin Shi, Ye Feng, Tao Li, Xiujun Dong and Jin Deng
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Guanchen Zhuo: College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
Keren Dai: College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
Huina Huang: College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
Shengpeng Li: College of Public Administration, Fujian Agriculture and Forestry University, Fuzhou 350028, China
Xianlin Shi: College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
Ye Feng: College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
Tao Li: Global Navigation Satellite System Research Center, Wuhan University, Wuhan 430079, China
Xiujun Dong: State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
Jin Deng: College of Earth Science, Chengdu University of Technology, Chengdu 610059, China

Sustainability, 2020, vol. 12, issue 17, 1-17

Abstract: The land reclaimed from the seaside may have a long-term subsidence trend, which poses a potential geohazard in the future land use. Xiamen Xiang’an New Airport (XXNA) is built on reclaimed land since 2016. Based on the spaceborne Sentinel-1 data between January 2018 to April 2019 and the time series interferometric synthetic aperture radar (InSAR) technique, this paper analyzed the reclaimed land subsidence evolution at XXNA in this period. InSAR measurements show that XXNA is suffering from severe subsidence, mainly in three regions because of the earth and sand compacting. By analyzing the spatial subsidence characterizations of the main subsiding areas combined with historical land reclamation and future land use planning, we find the potential threat of subsidence to future land use. Correlation between subsidence and the period of reclamation was found, indicating that the consolidation and compression in dredger fill is the main cause of subsidence. By combining subsidence monitoring results with different land use types and adopting the Expectation (Ex) and Entropy (En) methods, we analyzed the key area with potential subsidence geo-hazard. This work shows that with SAR interferometry, it is possible to find the large area ground subsidence in the airport reclaimed area. The areas with potential subsidence geo-hazards are consistent with the deep reclaimed earth, which means high subsidence risk in the future.

Keywords: InSAR; reclaimed land; subsidence; Sentinel-1; Xiamen Xiang’an New Airport; entropy (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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