El georadar como herramienta para estimar tasas de desplazamiento en deslizamientos activos
- M. Moreno-Sánchez 1
- C. Reyes-Carmona 2
- P. Ruano 1
- T. Teixidó 3
- A. Millares 4
- J.P. Galve 1
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1
Universidad de Granada
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2
Instituto Geológico y Minero de España
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- 3 Instituto Andaluz de Geofísica, Universidad de Granada
- 4 Instituto Interuniversitario de Investigación del Sistema Tierra en Andalucía (IISTA), Universidad de Granada
ISSN: 1576-5172
Year of publication: 2021
Issue Title: X Congreso Geológico de España
Issue: 18
Pages: 552
Type: Article
More publications in: Geotemas (Madrid)
Abstract
The slope movements are a frequent phenomenon in mountainous terrains. However, human interaction with the environment could increase natural hazards related to them. The Rules Reservoir (Southern Spain) is an example of how human modifica- tion of natural conditions could increase a previous tendency of unstable slopes to slide. An active and potentially dangerous new landslide has been detected and mapped recently in the Rules Reservoir, thanks to the contribution of InSAR data. The national road N-323 crosses that landslide, called El Arrecife, which activity had dama- ged the road continuously, at least since the last two decades. Due to the road resurfacing yearly, it is possible to estimate the subsidence that had experimented the road analysing ground-penetrating radar (GPR) profiles where asphalt layers and their thickness can be identified. This information has completed the record of displacement rates measured with InSAR tech- niques. Thus, GPR profiles indicates an average subsidence rate of 45 mm/yr and InSAR data show a movement between 5 up to 65 mm/yr along the road. These techniques therefore measure movements of the same order of magnitude (cm/yr). GPR also indicates that those displacement rates remained throughout the last 20 years.