DiC.WLF2023 — Pubblicazione

Purpose: In 2021, the Special Commissioner for mitigating the hydrogeological risk of the Apulia Region has identified 16 engineering companies for the assignment of engineering and architectural technical services for the reduction of hydrogeological risk (Landslide Plan). The projects were related to 16 lots, located mainly in the Daunia area (north of Apulia Region), for interventions financed through the Operational Plan FSC Environment 2014-2020. Methods: To support the planning and construction of the consolidation works, the Special Commissioner has planned an in-depth monitoring of the evolutionary kinematics of the instability. In particular, support for the design activities with updated information related to the historical ground motion movements has been foreseen for each scheduled mitigation intervention. In particular, in addition to the in-situ monitoring systems (existing or planned), the integration of the satellite monitoring through the multi-temporal interferometry technique was requested to monitor the areas objects of the stabilization works. The Multi-Temporal Interferometry provides a synoptic picture of the monitored phenomena of instability that is useful to support the design activities, and the Special Commissioner’s activities. Results: To answer these needs, the Rheticus Displacement satellite monitoring service provided by Planetek Italia was adopted for the monitoring of the areas subject to interventions. This service provided the ground motion measurements over the areas of intervention subject to instability phenomenon through the processing of data acquired both from Sentinel-1 and COSMO-SkyMed radar satellite constellations processed with the interferometric technique based on the SPINUA algorithm. The Rheticus Displacement service provided the ground motion maps and the historical time series of displacement and geo-analytics for each Persistent Scatterers (PS) and Distributed Scatterers (DS) over the time interval 2015 – 2020. The geo-analytics information has been made available to the Special Commissioner’s Office technicians and the designers through the Rheticus Displacement cloud platform. In addition to the Rheticus Displacement access, Planetek Italia provided dedicated on-the-job training to the technicians in charge of the design activities focusing on the results produced with the interferometric analysis and on the functionality of the Rheticus geo-portal. The training activities were essential for fully exploiting the results and their integration within the design phase of the intervention works. Conclusions: Currently, the Rheticus Displacement service is adopted by the Special Commissioner of Apulia Region, among the actions, to monitor the impact of the realized mitigation works continuously, guaranteeing optimal maintenance of the territory over the areas of interest.

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