Displacement patterns of a landslide affected by human activities: insights from ground-based InSAR monitoring |
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| Authors: | Francesca Bozzano Ivan Cipriani Paolo Mazzanti Alberto Prestininzi |
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| Institution: | 1.CERI,Research Centre on Prevention, Prediction and Control of Geological Risks,Valmontone,Italy;2.Dipartimento di Scienze della Terra,“Sapienza” Università di Roma,Rome,Italy;3.NHAZCA S.r.l.,Spin-Off “Sapienza” Università di Roma,Rome,Italy |
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| Abstract: | Landslides interacting with large infrastructures represent a major problem for the economy, society as a whole, and the safety
of workers. Continuous monitoring for 23 months using an integrated platform with a ground-based SAR interferometer (GB-InSAR),
a weather station, and an automatic camera gave us the opportunity to analyze the response of an unstable slope to the different
phases of work. The deformational behavior of both the natural slope and the man-made structures was recorded and interpreted
in relation to the working stages and the rainfall conditions during the whole monitoring period. A typical pattern of displacement
was identified for shallow landslides, debris produced by the excavation and gabions, metallic walls, and anchored bulkheads.
Furthermore, insights into the dynamics and behavior of the slope and the man-made structures that interact with the landslide
were obtained. Extreme rainfall is the main trigger of shallow landslides and gabion deformations, while anchored bulkheads
are less influenced by rainfalls. Movement of debris that is produced by excavations and temporary metallic barrier deformation
are closely related to each other. The herein proposed monitoring platform is very efficient in monitoring unstable slopes
that are affected by human activities. Moreover, the recorded patterns of displacement in the slope and the man-made structures
can be used as reference data for similar studies and engineering designs. |
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