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Products  Radar Remote Sensing Landslide monitoring and Warning Maps
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Using persistent scatterers technique with SPINUA © it is possible to monitor slow moving landslides and to provide important signals for a landslide warning system.
The example is relative to a study of Maratea landslide conducted in collaboration with Geocart.
The methodology has been developed and tested in the LEWIS eurpean project and has been applied in other investigations in different European countries.
The key element in the LEWIS project is to avoid trying to infer absolute values of relevant geophysical parameters from EO data, but only their changes in time in the wider sense of "deviations from a known temporal evolution model". Other periodic information, relevant for this project, can be obtained from existing ground networks for rain and earthquakes.
The detected changes have to be integrated into a GIS, together with other more static parameters, and used to infer potential slope stability changes and to produce Early Warning.
Therefore, the LEWIS Early-warning maps are obtained through the detection of temporal ground surface changes, associated with static landslide susceptibility mapping. Interpretation of the change maps, processed in automated mode by incorporating expert knowledge into an inference engine leads to a warning that the detected changes are leading towards a slope instability condition.
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Landslide in Madesimo (Italy)
Slow ground movements in Maratea (Italy)
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Five chief products obtained by LEWIS may be of interest for deployment in a variety of practical situations:
The Watch map: all the information, static and dynamic, collected from EO and from ground networks and included in the GIS after all processing but before the application of the inference engine.
The susceptibility map, which consists of a "zonation" of the area into seven levels of susceptibility (plus a zero level) based on the static information (slope, lithology, geology, past landslide activity,...) extracted from EO and field data.
The warning map or updateable susceptibility map, which is the final product highlighting seven levels of warning. The warning map is based on the displacement information coming from the PS detection and from the outcomes of the inference engine, incorporating and automating expert competences in recognizing areas of increasing landslide hazard.
The GIS module includes the innovative models for producing both the susceptibility and warning maps. It could thus also constitute the basis for an integrated marketable product for landslide warning.
The user Consultation enhancer, which is based on a visualization and analysis tool of the PS. This is a support tool dedicated to all kinds of customers interested in landslide studies.
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Landslide Warning Map from LEWIS Project
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