Abstract
Abstract. Heavy rain between the 2nd and 3rd of October 2020 severely affected the area of Limone Piemonte, Piemonte Region (Italy). The consequence of those two days of rain was a flood that, starting from the hamlet of Limonetto severely damaged the areas close to the riverbed of the Vermegnana river and the related hydrographyc network. A synergistic multi-sensor and multi-scale approach for documenting the affected areas using VHR satellite images and UAVs (Uncrewed Aerial Vehicles) is presented. The pro and cons in terms of level of detail and processing strategies are reviewed with a focus on the workflows adopted for processing large UAV datasets. A thorough analysis of the 3D positional accuracy achievable with different georeferentation strategies for UAVs data processing is carried out, confirming that if an RTK (Reale Time Kinematic)-enabled GNSS (Global Navigation Satellite System) receiver is available on the UAV platform and proper acquisition guidelines are followed, the use of GCPs (Ground Control Points) is not impacting significantly on the overall positional accuracy. Satellite data processing is also presented, confirming the suitability for large scale mapping.
Highlights
In the last decades, the increased incidence of catastrophic events has posed new obstacles to the operators involved in preparedeness, response, recovery, and mitigation phases of the emergency management cycle
The case study presented in this research is focused on the area of Limone Piemonte, a village located in the southwest of Piemonte region, Italy that was hit by a major flood induced by heavy precipitations between the 2nd and 3rd of October 2020 (Figure 1)
The documentation of the area of interest in Limone Piemonte was carefully designed to respond to different needs: during the fieldwork, it was necessary to map the riverbed and the damages in the urban area of Limone and along the Strada Statale 20
Summary
The increased incidence of catastrophic events has posed new obstacles to the operators involved in preparedeness, response, recovery, and mitigation phases of the emergency management cycle. In this context, emergency mapping based on both satellite has been used as primary source of information in the last decade, being generally available shortly after the event (Boccardo & Giulio Tonolo, 2015; Tralli et al, 2005). The case study presented in this research is focused on the area of Limone Piemonte, a village located in the southwest of Piemonte region, Italy that was hit by a major flood induced by heavy precipitations between the 2nd and 3rd of October 2020 (Figure 1). The hydric systems and the riverbed of the Vermegnana river were severely hit by these events
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
