Land subsidence lagging quantification in the main exploration aquifer layers in Beijing plain, China

Beibei Chen, Huili Gong, Kunchao Lei, Jiwei Li, Chaofan Zhou, Mingliang Gao, Hongliang Guan, Wei Lv

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Land subsidence is rapidly developing across the Beijing Plain, China. Long-term intense overexploitation of groundwater is the main reason for land subsidence in Beijing. In this study, an optimized Small Baseline Subset (SBAS) interferometry method was developed to process 46 RADATSAT-2 images from 2011 to 2015 to investigate the spatial and temporal dynamics of land subsidence in the Beijing Plain. The lag time between land subsidence and groundwater exploitation was first analyzed by the Continuous Wavelet Transform (CWT) and Cross Wavelet Transform (XWT) methods Our study found that the maximum subsidence rate reached 141 mm per year. The analysis of the areas and volumes of the annual subsidence rates indicated that the overall deformation trend slowed down from 2011 to 2015. Our results indicate that the subsidence center is always located in the southeast of Chaoyang District from 2011 to 2015. The lag time between the observed subsidence and the groundwater level drops in the main exploration aquifer layers was 0.57–1.76 months. This information is helpful to reveal the mechanism of land subsidence and build hydrogeological model.

Original languageEnglish (US)
Pages (from-to)54-67
Number of pages14
JournalInternational Journal of Applied Earth Observation and Geoinformation
Volume75
DOIs
StatePublished - Mar 2019
Externally publishedYes

Keywords

  • Groundwater
  • InSAR
  • Lag time
  • Land subsidence

ASJC Scopus subject areas

  • Global and Planetary Change
  • Earth-Surface Processes
  • Computers in Earth Sciences
  • Management, Monitoring, Policy and Law

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