Emergency monitoring of a landslide for public safety
Client:
Municipality of Bonorva
Period:
January 2021 – February 2021
Location:
Sardinia, Italy
Technologies:
Terrestrial SAR Interferometry
Emergency monitoring of a landslide for public safety
Client:
Municipality of Bonorva
Period:
January 2021 – February 2021
Location:
Sardinia, Italy
Technologies:
Terrestrial SAR Interferometry
Problem
Following heavy rainfall, a landslide process was triggered that involved a house, destroying it, and threatening an entire settlement.
Problem
Following heavy rainfall, a landslide process was triggered that involved a house, destroying it, and threatening an entire settlement.
Solution
Less than 48 hours after the request for intervention, a series of emergency activities were carried out according to the emergency protocol called PRIMO – PRompt Intervention Monitoring Service. In detail, following a technical inspection by NHAZCA experts, several instruments were deployed in the field, including a Terrestrial Laser Scanner, a Terrestrial SAR Interferometer and Corner Reflectors to refine the quality of SAR data acquired. The Terrestrial SAR Interferometer (TInSAR) had the aim to monitor continuously (24h/24h) the movements of the unstable slope and to control its evolution in time.
Solution
As part of the monitoring campaign, a series of activities were carried out using various techniques in the field of remote sensing. Initially, a survey was carried out using a Terrestrial Laser Scanner that allowed the creation of a three-dimensional model of the area under investigation. This activity is considered preparatory to the installation of a Terrestrial SAR Interferometer (TInSAR) for the continuous monitoring (24h/24h) of the movements of the slope and of the works realized on the highway section. Corner Reflectors were also installed along the scenario in order to refine the quality of the acquired data. Finally, the monitoring station has been equipped with an optical sensor for the continuous acquisition of digital images of the monitored scenario.
Results
The continuous monitoring by Terrestrial SAR Interferometry allowed to identify the main unstable sectors of the slope and to control their evolution, also taking into account local meteorological data (e.g. rainfall).
Results
The continuous monitoring by Terrestrial SAR Interferometry allowed to identify the main unstable sectors of the slope and to control their evolution, also taking into account local meteorological data (e.g. rainfall). Monitoring reports were continuously provided to the local civil protection authorities in order to implement all precautionary measures.
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