Ruinon The landslide is one of the most dangerous landslides in the central sector of the Alps, meaning the term "dangerous" in its pure sense. In particular it is a complex sliding scale of rock estimated to be between 20 and 40 million cubic meters. In fact it is quite similar in size to the most famous and infamous landslide Valpola during the flood of 1987 ( http://www.arpalombardia.it/cmg ).
knowledge of the landslide back to the first events of the early 90s when it was immediately following that covered the entire valtellina interventions Structural response to rain in its flood. In that same period, considering also the significant economic availability of funds, was born, or rather suffered a strong impulse, geological monitoring. According to a slightly more modern monitoring is in fact a structural response to a natural event. In particular, this is addressed primarily to the knowledge dle phenomenon, the next modeling, and finally, in a modern perspective of civil protection, forecasting and prevention of the effects of the phenomenon.
E 'in this spirit that the Ruinon today is so well known, since 1996 have been many tools and monitoring activities that have involved him.
From a technical point of view on Ruinon wire strain gauges were tested, base strain, and distometri convergence measures for manual measurements, inclinometers (fixed and manuals), and Casagrande piezometers open pipe (also telemetry), and one of the first monitoring campaign with fixed GPS telemetry ever made in Italy. Obviously many of these monitoring campaigns have been accompanied topography over time.
From a standpoint geognostic however, apart from the obvious geognostic the Ruinon has also been studied by geoelectrical: CT, stringing traditional geophysical and spontaneous potential, then we must remember idrogeognostiche campaigns related to the extent of the tracer diffusivity of hydro done through the introduction of sodium fluorescein and the measurement with verification of the depletion curve.
Finally in 2006 (June) there is a synthetic aperture radar system from the ground (GBInSAR) permanently installed on the side opposite to that in the landslide that allows near real-time monitoring of the entire landslide body, and then approach monitoring the areal and punctual.
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