气候变化领域集成服务门户(CCPortal): Surface response and subsurface features during the restriction of groundwater exploitation in Suzhou (China) inferred from decadal SAR interferometry

CCPortal

DOI	10.1016/j.rse.2021.112327
	Surface response and subsurface features during the restriction of groundwater exploitation in Suzhou (China) inferred from decadal SAR interferometry
	Shi G.; Ma P.; Hu X.; Huang B.; Lin H.
发表日期	2021
ISSN	00344257
卷号	256
英文摘要	Groundwater overexploitation has caused dramatic land subsidence over the metropolitan areas in the Yangtze River Delta (YRD) and many other economic centers worldwide. Suzhou (China) is such a sinking city and faces enhanced flood risks. Restrictions on groundwater exploitation (RGE) have been imposed by the government since 1997 to prevent further elevation loss. However, knowledge on the spatiotemporal evolution of the urban land deformation during the RGE is limited by sparse and infrequent field measurements, which may bias the evaluation of the RGE policy and the strategy formulation of water management. Interferometric synthetic aperture radar (InSAR) provides regional surface deformation at a regular temporal interval of dozens of days. Here we present the decadal evolution of ground deformation in Suzhou using multiple InSAR datasets from ERS1/2, ENVISAT-ASAR, and ALOS-1 PALSAR-1 during 1993–2010, spanning the entire RGE period. An elongated zone from southern to northwestern Suzhou is highlighted by a drastic cumulative land subsidence exceeding 0.9 m due to inelastic aquifer compaction. We characterize the spatiotemporal ground deformation response to the RGE policy using an exponential decay function, from which we also infer the subsurface boundaries with sharp bedrock gradients. We identify a corridor connecting the Yangcheng and Taihu lakes, which is highly sensitive to RGE during the decelerated subsidence. Our analysis also suggests that urban subsidence in Suzhou was under control by 2006−0.4+1.4. © 2021 Elsevier Inc.
英文关键词	Aquifer deformation; Geological boundary; Groundwater overexploitation; InSAR; Restrictions on groundwater exploitation (RGE)
语种	英语
scopus关键词	Aquifers; Deformation; Floods; Groundwater resources; Interferometry; Subsidence; Water management; Exponential decay functions; Ground deformations; Groundwater exploitation; Groundwater overexploitation; Interferometric synthetic aperture radars; Spatiotemporal evolution; Strategy formulations; Surface deformation; Synthetic aperture radar; exploitation; flood; interferometry; response surface methodology; spatiotemporal analysis; synthetic aperture radar; water management
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178929
作者单位	Institute of Space and Earth Information Science, The Chinese University of Hong Kong, Shatin, N.T, Hong Kong; Key Lab of Poyang Lake Wetland and Watershed Research of Ministry of Education, School of Geography and Environment, Jiangxi Normal University, Nanchang, 330022, China; Berkeley Seismological Laboratory, University of California, Berkeley, CA 94720-4767, United States; Department of Earth and Planetary Science, University of California, Berkeley, CA 94720-4767, United States; Department of Geography and Resource Management, The Chinese University of Hong Kong, Shatin, N.T, Hong Kong; Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, 518063, China
推荐引用方式 GB/T 7714	Shi G.,Ma P.,Hu X.,et al. Surface response and subsurface features during the restriction of groundwater exploitation in Suzhou (China) inferred from decadal SAR interferometry[J],2021,256.
APA	Shi G.,Ma P.,Hu X.,Huang B.,&Lin H..(2021).Surface response and subsurface features during the restriction of groundwater exploitation in Suzhou (China) inferred from decadal SAR interferometry.Remote Sensing of Environment,256.
MLA	Shi G.,et al."Surface response and subsurface features during the restriction of groundwater exploitation in Suzhou (China) inferred from decadal SAR interferometry".Remote Sensing of Environment 256(2021).