Distributed Acoustic Sensing (DAS) for River Embankments Monitoring: An Open Laboratory at the Chivasso Test Site

Summary The management of river basins has often involved the building of embankments. These need proper monitoring of their geotechnical properties and this task has become more critical in recent decades due to the increase of extreme rain events induced by climate change. Embankment monitoring faces numerous challenges, foremost the lack of instrumentation installed along their relevant lengths. Distributed Acoustic Sensing (DAS) could provide a feasible solution. However, DAS data analysis and interpretation could be critical, therefore, preliminary tests comparing DAS and standard seismic instrumentation are necessary to allow for a precise understanding of its potentiality. In this context, and within the framework of the Geocharme project, an open field laboratory for the study of DAS response over embankment structures was built over the Chivasso (near Torino, northwest Italy) embankment test site. This paper presents the test site and DAS installation and report the results of some preliminary tests executed. The final aim is the implementation and full functionality of the open field laboratory in order to make it available for different researchers to test their acquisition and interpretation approaches and improve the applicability of DAS technology at a wide scale over embankment structures.

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