Environmental protection and population safety are among the main concerns of Public Administrations. A lot of serious accidents related to ground and structures instability have happened in recent years, taken to extreme by exceptional meteorological phenomena and sometimes fostered by human negligence.
Slow landslides are often unknown and only apparently with no direct effects and in assets and population, whereas they can be accelerate by heavy rains, causing serious damages and affecting a lot of people.
Public Administrations need to be provided with efficient and effective tools to analyse the situation in order to prevent those accident or, at least, to take their evolution under control.
Traditional techniques are usually very limited and expensive with respect to the area which are able to analyse.
GPS stations and in situ sensors usually allows accurate and continuous measurements, but the information provided is related only to the strict surrounding of the sensor itself. Moreover sensors are expensive, sometimes difficult to reach for installation and maintenance, subjected to theft and get lost or broken once a bigger event happens.
Information provided by in situ sensor is also limited in time and it is difficult to have historical measurements to analyse the evolution of phenomena
with a moderate costs and no risk for manpower and materials, in order to allow the activation preventive actions and to better focus local traditional analysis. The solution is based on the provision of data and services through the use on remote sensing data integrated with more traditional in situ instrumentation. In fact, remote sensing imageries allow to monitor wide areas with relatively limited costs. Moreover, data derived by remote sensing analysis can be easily integrate and managed through GIS base platforms which allow data cross correlation for further and deeper analysis and modelling.
- To guarantee safety of settlements
- To receive early warning in case of existing landslides
- To save money and preserve instruments
Our solution enables the detection of slow movements (e.g. slight subsidence, ground movements, landslides) occurring along and close to critical assets (as plants, industrial sites, infrastructures) or standing on settlements, by adopting e-GEOS proprietary processing technology (PSP-IFSAR©).
The method is based on the analysis of time series of SAR satellite data, allowing to measure displacements with millimetre accuracy. This solution allows to collect displacement measures over points scattered on the territory, with a density that, in urban areas, can exceed 20,000 points per squared kilometre. SAR satellites have been in orbit since 1992, so in many cases it is possible to perform historical analysis to better study and understand phenomena evolution.
Therefore, this solution acts as an early warning system for detecting new landslides or potentially critical situation controlling the displacements over large extensions, without any kind of ground measurements and instrumentation setting up and maintaining, over every location on the earth.
Moreover PSP-IFSAR analysis is a completely independent measure. This helps in a better understanding of the territory guiding operators in the design of an more effective ground based sensor network.
Measures are fully tri-dimensional and all measures can be managed in any GIS systems. Achievable accuracy in the velocity estimation is continuously tested vs ground measurements.