气候变化领域集成服务门户(CCPortal): Satellite InSAR survey of structurally-controlled land subsidence due to groundwater exploitation in the Aguascalientes Valley, Mexico

CCPortal

DOI	10.1016/j.rse.2020.112254
	Satellite InSAR survey of structurally-controlled land subsidence due to groundwater exploitation in the Aguascalientes Valley, Mexico
	Cigna F.; Tapete D.
发表日期	2021
ISSN	00344257
卷号	254
英文摘要	To address increasing water demands in expanding cities, many aquifers in Mexico are overexploited and deplete. The resulting land subsidence often combines with ground faulting/fracturing and damage to infrastructure. This study provides the longest Synthetic Aperture Radar (SAR) survey ever undertaken for the Aguascalientes Valley, aimed to constrain its structurally-controlled subsidence process and the induced risk. 275 ERS-1/2 1996–2002, ENVISAT 2003–2010 and Sentinel-1 2014–2020 C-band SAR images are processed with change detection, differential Interferometric SAR (InSAR) and Small Baseline Subset (SBAS) methods. Aguascalientes notably expanded over the last four decades, as revealed by Seasat 1978 L-band SAR, Landsat 1985–2010 and Sentinel-2 2020 optical imagery. The observed subsidence pattern involves alluvial/fluvial deposits within the N-S trending graben. Maximum settlement rates are −14 cm/year in 1996, −10 cm/year in 2000–2010 and over −12 cm/year in 2015–2020. An acceleration (−0.70 cm/year2) is recorded in 2015–2020 close to recently developed industrial plants and housing districts. Satellite estimates agree with in-situ observations, static GPS surveying and continuous GPS monitoring data. Rough correlation is found with piezometric level drop rates, whereas aquifer thickness plays a stronger role in the subsidence process. While these outcomes align with the existing literature, this InSAR survey: (i) unveils previously unknown E-W deformation affecting two N-S oriented bands within the valley, with up to ~ ±3 cm/year in 2015–2020 towards its center; (ii) identifies zones of sagging and hogging with horizontal strain (ε) of up to 0.05–0.1%; (iii) retrieves differential rates reaching 6–8 cm/year and angular distortions (β) of 1/500 along the Oriente fault; and (iv) investigates the statistical distribution of β across field surveyed faults and fissures, and marks areas with potentially yet-unmapped ground discontinuities. A new surface faulting risk matrix embedding β and ε is therefore proposed to estimate subsidence impact on properties and population. Given its scale-dependency, the risk assessment provides a lower bound to the percentage of urban areas at risk within the Aguascalientes state: at least 2% of the urban areas were at high and very high risk in 2003–2010 (involving ~12,000 properties and ~39,000 inhabitants), but this increased to 6% in 2015–2020 (~25,600 properties, ~85,200 inhabitants). The evidence of a subsidence process evolving spatially and temporally highlights the need for continuous updating of hazard information. © 2020 Elsevier Inc.
英文关键词	Angular distortion; Aquifer depletion; Groundwater pumping; InSAR; Land subsidence; Mexico; SAR; SBAS; Sentinel-1; Surface faulting
语种	英语
scopus关键词	Angular distribution; Aquifers; Faulting; Geodetic satellites; Global positioning system; Groundwater resources; Hydrogeology; Landforms; Process control; Risk assessment; Risk perception; Space-based radar; Subsidence; Surveys; Angular distortions; Continuous updating; Differential interferometric sar; Groundwater exploitation; In-situ observations; Piezometric levels; Small baseline subsets; Statistical distribution; Synthetic aperture radar; aquifer; exploitation; GPS; groundwater; Landsat; risk assessment; Seasat; subsidence; synthetic aperture radar; urban area; Aguascalientes; Mexico [North America]
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/178983
作者单位	Italian Space Agency (ASI), Via del Politecnico s.n.c., Rome, 00133, Italy
推荐引用方式 GB/T 7714	Cigna F.,Tapete D.. Satellite InSAR survey of structurally-controlled land subsidence due to groundwater exploitation in the Aguascalientes Valley, Mexico[J],2021,254.
APA	Cigna F.,&Tapete D..(2021).Satellite InSAR survey of structurally-controlled land subsidence due to groundwater exploitation in the Aguascalientes Valley, Mexico.Remote Sensing of Environment,254.
MLA	Cigna F.,et al."Satellite InSAR survey of structurally-controlled land subsidence due to groundwater exploitation in the Aguascalientes Valley, Mexico".Remote Sensing of Environment 254(2021).