Landslide Monitoring
Products
Radar Remote Sensing
Landslide monitoring and warning maps
Landslide monitoring and warning systems
By using the Persistent Scatterers technique with the SPINUA© algorithm, it is possible to monitor slow-moving landslides and provide essential information for the development of an early warning system for landslide risk.
The example given relates to the study of the Maratea landslide, carried out in collaboration with Geocart.
The methodology was developed and validated as part of the European LEWIS project and has subsequently been applied in numerous studies carried out in various European countries.
The key element of the LEWIS project lies not in attempting to derive absolute values for the main geophysical parameters from Earth Observation (EO) data, but rather in monitoring their variations over time, understood as deviations from a known model of temporal evolution.
Additional periodic information relevant to the project, such as data on precipitation and seismic events, can be obtained from ground-based monitoring networks.
The variations detected are integrated into a Geographic Information System (GIS) alongside other, more stable parameters and used to assess possible changes in slope stability and to generate early warning systems.
The LEWIS Early Warning maps are therefore derived by detecting temporal variations in the ground surface, integrated with static maps of landslide susceptibility. The automated interpretation of the variation maps, using an inference engine that incorporates expert knowledge, makes it possible to identify situations where the observed changes indicate a progression towards conditions of slope instability.
Application examples
- Madesimo landslide (Italy)
- Slow ground movements in Maratea (Italy)
The five main products developed within the LEWIS project
Watch Map This
brings together all static and dynamic information from Earth Observation data and ground-based monitoring networks, integrated into the GIS after data processing but before the inference engine is applied.
Susceptibility
Map This divides the territory into seven levels of susceptibility (in addition to a level of zero), based on static information such as slope, lithology, geology, past landslide events and other data derived from Earth Observation and field surveys.
Warning Map or updatable
susceptibility map This is the final product representing seven warning levels. It is based on displacement data obtained through the analysis of Persistent Scatterers (PS) and on the results of the inference engine, which integrates and automates specialists’ expertise in identifying areas with increasing landslide hazard.
GIS
Module This comprises the innovative models used to produce both susceptibility maps and warning maps. It also forms the basis for an integrated product designed for landslide risk monitoring and warning.
User Consultation Enhancer
It is based on a system for visualising and analysing Persistent Scatterer (PS) data and is designed to support all users interested in landslide studies and monitoring.
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Landslide risk warning map developed as part of the LEWIS project |
