PSI - Issue 84

Luciano Pavesi et al. / Procedia Structural Integrity 84 (2026) 583–590

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only median risk estimates but also quantile distributions, enabling stakeholders to understand the range of possible outcomes and identify areas where parameter uncertainty most significantly affects risk estimates. In this respect, the project RESCUE_SAT also aims to make accessible the originated products (i.e. inundation maps, derived DEMs) to end-users through the development of an interactive web-GIS application for visualization and spatial analysis. 3. Applicability of RESCUE_SAT hydraulic risk assessment at bridges This approach allows RESCUE_SAT to consistently evaluate how infrastructure presence and geometry modify flood impacts at the territorial scale, without resorting to fully resolved local hydrodynamic simulations. At the same time, it remains aligned with the ANSFISA Guidelines, positioning RESCUE_SAT as a methodological support for intermediate assessment levels. The framework preserves the computational efficiency and spatial homogeneity required for large-scale applications, while introducing a more physically-based estimation of water depth, hydraulic head, overtopping and cross-section restrictions effects. In this way, RESCUE_SAT addresses key limitations of purely screening-level approaches and provides a more refined representation of the interaction between infrastructures and flood dynamics. This capability is particularly relevant not only for present conditions but also for future scenarios, where increasing flood intensity may amplify hydraulic effects associated with levee confinement and channel constriction at bridge crossings. By doing so, RESCUE_SAT contributes to the harmonization of hydraulic risk assessment procedures within the ANSFISA Level 2 framework, without replacing the detailed analyses envisaged at higher assessment levels. Acknowledgements The RESCUE_SAT project is developed in collaboration with the Italian Space Agency (ASI) under the “I4DP_SCIENCE” initiative (Agreement no. 2025-2-HB.0 between ASI and the University of Roma Tre). Research carried out using COSMO-SkyMed® Products, © of the Italian Space Agency (ASI), delivered under a license to use by ASI. References Alfieri, L., Burek, P., Feyen, L. & Forzieri, G. (2015). Global warming increases the frequency of river floods in Europe. Hydrology and Earth Systems Science , 19, 2247–2260. Blöschl et al. (2019). Changing climate both increases and decreases European river floods. Nature 573, 108–111. D’Angelo, C., Fiori, A. & Volpi, E. (2020). Structural, dynamic and anthropic conditions that trigger the emergence of the levee effect: Insight from a simplified risk-based framework. Hydrological Sciences Journal , 65. de Moel, H., van Alphen, J., & Aerts, J. (2009). Flood maps in Europe-methods, availability and use. Natural Hazards and Earth Systems Science, 9, 289–301. Dottori, F., Mentaschi, L., Bianchi, A., Alfieri, L., & Feyen, L. (2023). Cost-effective adaptation strategies to rising river flood risk in Europe. Nature Climate Change , 13(2), 196-202. Farr, T. G., Rosen, P. A., Caro, E., Crippen, R., Duren, R., Hensley, S., ... & Alsdorf, D. (2007). The shuttle radar topography mission. Reviews of Geophysics , 45(2). Ferretti, A., Prati, C., & Rocca, F. (2002). Permanent scatterers in SAR interferometry. IEEE Transactions on Geoscience and Remote Sensing , 39(1), 8-20. Gagliardi, V., Mwangi, R., Napolitano, A., Pavesi, L., Pomarico, I., Cipollini, S., ... & Volpi, E. (2025). Enhancing hydraulic risk assessment using next-generation satellite remote sensing: the RESCUE_SAT project. In Earth Resources and Environmental Remote Sensing/GIS Applications XVI (Vol. 13671, pp. 161-168). SPIE. Ingram, W. (2016). Increases all round. Nature Climate Change, 6, 443–444. Italian Space Agency—ASI. COSMO—SkyMed Mission and Products Description; Doc. N° ASI-CSM-PMG-NT-001, 8 July 2019, issue 3; Italian Space Agency: Rome, Italy, 2019; https://www.asi.it/wp-content/uploads/2019/08/COSMO-SkyMed-Mission-and-Products-Description_rev3 1.pdf Jongman, B., Ward, P. J., & Aerts, J. C. (2012). Global exposure to river and coastal flooding: Long term trends and changes. Global Environmental Change , 22(4), 823-835.