Vertical Displacement Measurement in a Slow-Moving Sinkhole Using BOTDA

作     者：Pascual SEVILLANO Javier PRECIADO-GARBAYO Jorge SEVIL Francisco GUTIERREZ Juan JMARTiNEZ Sonia MARTiN-LOPEZ Miguel GONZALEZ-HERRAEZ Pascual SEVILLANO;Javier PRECIADO-GARBAYO;Jorge SEVIL;Francisco GUTIÉRREZ;Juan J.MARTÍNEZ;Sonia MARTÍN-LÓPEZ;Miguel GONZÁLEZ-HERRÁEZ

作者机构：Aragon Institute of Engineering Research(I3A)Universidad de ZaragozaZaragoza 50018Spain Electronic Enginering and Communicaton DpartmentEINAUniversidad de ZaragzaZaragza 50018Spain Aragon Photonics Labs.Zaragoza 50009Spain Department of Earth SciencesUniversidad de ZaragozaZaragoza 50009Spain Department of ElectronicsEscuela Politecnica SuperiorUniversidad de AlcalaMadrid 28805Spain 

出 版 物：《Photonic Sensors》 (光子传感器（英文版）)

年 卷 期：2024年第14卷第1期

页      面：23-39页

核心收录：

学科分类：080202[工学-机械电子工程] 08[工学] 0804[工学-仪器科学与技术] 0802[工学-机械工程] 0702[理学-物理学] 

基　　金：This work has been supported by Ministerio de Ciencia e Innovacion,Gobierno de Espana(Grant Nos.CGL2017-85045-P,PID2021-123189NB-I00,DI-17-09169) Government of Aragon(Grant No.Reference Group T20_23R) Jorge Sevil has a predoctoral contract(Grant No.PRE2018-084240)co-financed by the Spanish Government and the European Social Fund(ESF) 

主　　题：Distributed fiber optic sensing(DFOS) vertical displacement measurement slow subsidence rate sinkhole hazard early-warning system 

摘      要：The effectiveness of monitoring and early-warning systems for ground deformation phenomena,such as sinkholes,depends on their ability to accurately resolve the ongoing ground displacement and detect the subtle deformation preceding catastrophic *** sinkholes with a slow subsidence rate and diffuse edges pose a significant challenge for subsidence monitoring due to the low deformation rates and limited lateral strain *** this work,we satisfactorily illustrate the practicality of the Brillouin optical time domain analysis(BOTDA)to measure the spatial-temporal patterns of the vertical displacement in such challenging slow-moving sagging *** assess the performance of the approach,we compare the strain recorded by the distributed optical fiber sensor with the vertical displacement measured by high-precision *** results show a good spatial correlation with the ability to identify the maximum subsidence *** is also a good temporal correlation with the detection of an acceleration phase in the subsidence associated with a flood event.