PSI - Issue 84

Antonio Fiorentino et al. / Procedia Structural Integrity 84 (2026) 749–756

754

Fig. 4 - Comparison between the profile (a) of the slope and the upstream (b) and downstream (c) transects, based on 2014 and 2024 LiDARs.Compar. 6. Hydrological analysis Rainfall forcing was investigated to assess its role in the June 2023 reactivation of the earthflow. Daily precipitation data were collected from the “Sinni–Valsinni” rain gauge station (Basilicata Decentralized Functional Center), operating since November 2013, and processed on a hydrological-year basis (September–August). The period September 2022–August 2023 was compared with the mean regime reconstructed from the available record. Following Guerricchio et al. (2012) and Doglioni et al. (2020), rainfall was filtered using a 25 mm/day threshold (cut-off) to highlight antecedent wetting conditions and effective infiltration. This threshold may appear quite arbitrary, but it was