RT Journal Article
T1 Using InSAR and GPR techniques to detect subsidence: application to the coastal area of “A Xunqueira” (NW Spain)
A1 Alonso Díaz, Alex
A1 Casado Rabasco, Josué
A1 Solla Carracelas, Maria Mercedes
A1 Lagüela, Susana
K1 2506 Geología
K1 2502 Climatología
K1 2507 Geofísica
AB Climate change represents an important cause of subsidence, especially in coastal cities affected by changes in surface water level and water table. This paper presents a complementary study of Interferometric Synthetic Aperture Radar (InSAR) and Ground Penetrating Radar (GPR) for the early detection of subsidence and sinkhole phenomena. The methodology was applied to a coastal urban area in Galicia, northwest Spain (humid region), showing apparent signs of subsidence and building settlement during the last two years. Two different InSAR methods are compared for the period from June 2021 to March 2022: PSI (Persistent Scatterer Interferometry) and SBAS (Small Baseline Subsets), and the average deformation velocities obtained resulted in −3.0 mm/yr and −4.1 mm/yr, respectively. Additional GPR data were collected in January 2022 to validate the InSAR results, which detected subsidence in agreement with the persistent scatters obtained from the PSI method. This is crucial information to plan preventive maintenance.
PB Remote Sensing
SN 20724292
YR 2023
FD 2023-07-26
LK http://hdl.handle.net/11093/5100
UL http://hdl.handle.net/11093/5100
LA eng
NO Remote Sensing, 15(15): 3729 (2023)
NO Xunta de Galicia | Ref. ED431F 2021/08
DS Investigo
RD 24-mar-2025