Application of InSAR and Gravimetry for Land Subsidence Hazard Zoning in Aguascalientes, Mexico

Remote Sensing

Jesús Pacheco-Martínez³  Enrique Cabral-Cano¹  Shimon Wdowinski²  Martín Hernández-Marín³  José Ángel Ortiz-Lozano³  Mario Eduardo Zermeño-de-León³  Zhenhong Li⁴  Roberto Tomas⁴  Norman Kerle⁴ 

[1] Departamento de Geomagnetismo y Exploración, Instituto de Geofísica, Universidad Nacional Autónoma de Mexico, Circuito de la investigación Científica, Ciudad Universitaria, D.F. 04510 Delegación Coyoacán, Mexico;Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149, USA;Centro de Ciencias del Diseño y de la Construcción de la Universidad Autónoma de Aguascalientes, Av. Universidad # 940, Ciudad Universitaria, C. P. 20131 Aguascalientes, Mexico;;Centro de Ciencias del Diseño y de la Construcción de la Universidad Autónoma de Aguascalientes, Av. Universidad # 940, Ciudad Universitaria, C. P. 20131 Aguascalientes, Mexico

关键词: land subsidence;    Aguascalientes;    surface cracks;    ground failure;    subsidence zoning;    subsidence hazard;   

DOI  :  10.3390/rs71215868

来源: mdpi

【 摘 要 】

In this work we present an application of InSAR and gravimetric surveys for risk management related to land subsidence and surface ground faulting generation. A subsidence velocity map derived from the 2007–2011 ALOS SAR imagery and a sediment thicknesses map obtained from the inversion of gravimetric data were integrated with a surface fault map to produce a subsidence hazard zoning in the city of Aguascalientes, Mexico. The resulting zoning is presented together with specific recommendations about geotechnical studies needed for further evaluation of surface faulting in these hazard zones. The derived zoning map consists in four zones including null hazard (stable terrain without subsidence), low hazard (areas prone to subsidence), medium hazard (zones with subsidence) and high hazard (zones with surface faulting). InSAR results displayed subsidence LOS velocities up to 10 cm/year and two subsidence areas unknown before this study. Gravimetric results revealed that the thicker sediment sequence is located toward north of Aguascalientes City reaching up to 600 m in thickness, which correspond to a high subsidence LOS velocity zone (up to 6 cm/year).

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.