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|Title:||Analysis of InSAR displacements for the slopes around Odelouca reservoir|
Falcão, A. P.
Lemos, J. V.
Fonseca, A. M.
|Keywords:||Radar interpretation;Slope instability;Cluster analysis;Time series analysis;Odelouca dam|
|Abstract:||Odelouca is the second largest earth dam in Portugal and holds an important water reservoir. A displacement map for the slopes around the reservoir during the initial phase of the first filling was built using a multitemporal interferometric synthetic aperture radar (MTI) technique. A method based on cluster and time series analysis is proposed in order to find patterns on the obtained scatterers. The points are aggregated through a measure of the similarity between their displacement time series and form clusters, whose properties can then be evaluated. The analysis can be complemented by additional information for a better understanding of the influence on the ground of the storage of such a large amount of water. Three different patterns were identified on the data: stable scatterers, scatterers moving away from the sensor and scatterers moving towards it. A set of outliers was also detected. One of the clusters may contain points susceptible to landslide occurrence.|
|Appears in Collections:||DBB/NGA - Comunicações a congressos e artigos de revista|
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|1-s2.0-S1877050918316818-main.pdf||Documento principal||1.25 MB||Adobe PDF||View/Open|
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