Anatomy of Subsidence in Tianjin from Time Series InSAR

Peng Liu; Qingquan Li; Zhenhong Li; Trevor Hoey; Guoxiang Liu; Chisheng Wang; Zhongwen Hu; Zhiwei Zhou; Andrew Singleton

doi:10.3390/rs8030266

Remote Sensing (Mar 2016)

Anatomy of Subsidence in Tianjin from Time Series InSAR

Peng Liu,
Qingquan Li,
Zhenhong Li,
Trevor Hoey,
Guoxiang Liu,
Chisheng Wang,
Zhongwen Hu,
Zhiwei Zhou,
Andrew Singleton

Affiliations

Peng Liu: Key Laboratory for Geo-Environment Monitoring of Coastal Zone of the National Administration of Surveying, Mapping and GeoInformation & Shenzhen Key Laboratory of Spatial Smart Sensing and Services, Shenzhen University, Shenzhen 518060, China
Qingquan Li: Key Laboratory for Geo-Environment Monitoring of Coastal Zone of the National Administration of Surveying, Mapping and GeoInformation & Shenzhen Key Laboratory of Spatial Smart Sensing and Services, Shenzhen University, Shenzhen 518060, China
Zhenhong Li: Center for Observation & Modeling of Earthquakes, Volcanoes & Tectonics (COMET), School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear NE1 7RU, UK
Trevor Hoey: School of Geographical & Earth Science, University of Glasgow, Scotland G12 8QQ, UK
Guoxiang Liu: Department of Surveying Engineering, Southwest Jiaotong University, Chengdu 610031, China
Chisheng Wang: Key Laboratory for Geo-Environment Monitoring of Coastal Zone of the National Administration of Surveying, Mapping and GeoInformation & Shenzhen Key Laboratory of Spatial Smart Sensing and Services, Shenzhen University, Shenzhen 518060, China
Zhongwen Hu: Key Laboratory for Geo-Environment Monitoring of Coastal Zone of the National Administration of Surveying, Mapping and GeoInformation & Shenzhen Key Laboratory of Spatial Smart Sensing and Services, Shenzhen University, Shenzhen 518060, China
Zhiwei Zhou: School of Geographical & Earth Science, University of Glasgow, Scotland G12 8QQ, UK
Andrew Singleton: Center for Observation & Modeling of Earthquakes, Volcanoes & Tectonics (COMET), School of Civil Engineering and Geosciences, Newcastle University, Newcastle upon Tyne, Tyne and Wear NE1 7RU, UK

DOI: https://doi.org/10.3390/rs8030266
Journal volume & issue: Vol. 8, no. 3
p. 266

Abstract

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Groundwater is a major source of fresh water in Tianjin Municipality, China. The average rate of groundwater extraction in this area for the last 20 years fluctuates between 0.6 and 0.8 billion cubic meters per year. As a result, significant subsidence has been observed in Tianjin. In this study, C-band Envisat (Environmental Satellite) ASAR (Advanced Synthetic Aperture Radar) images and L-band ALOS (Advanced Land Observing Satellite) PALSAR (Phased Array type L-band Synthetic Aperture Radar) data were employed to recover the Earth’s surface evolution during the period between 2007 and 2009 using InSAR time series techniques. Similar subsidence patterns can be observed in the overlapping area of the ASAR and PALSAR mean velocity maps with a maximum radar line of sight rate of ~170 mm·year−1. The west subsidence is modeled for ground water volume change using Mogi source array. Geological control by major faults on the east subsidence is analyzed. Storage coefficient of the east subsidence is estimated by InSAR displacements and temporal pattern of water level changes. InSAR has proven a useful tool for subsidence monitoring and displacement interpretation associated with underground water usage.

Published in Remote Sensing

ISSN: 2072-4292 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science
Website: http://www.mdpi.com/journal/remotesensing/

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