Reliability Engineering and System Safety, cilt.274, 2026 (SCI-Expanded, Scopus)
Floods are among the most recurrent and disruptive natural hazards in mountainous regions, where river corridors often coincide with critical transport infrastructure. This study introduces a diagnostic framework combining fractal and wavelet analyses to evaluate the resilience of transport corridors exposed to extreme hydro-meteorological events. Using the floods that occurred during 20 to 21 September 2025 in the Eastern Black Sea Region of Türkiye, the Higuchi Fractal Dimension (HFD) is applied in a sliding-window scheme to detect spatial “fragility windows” along the Fırtına and Görele Rivers. Complementary wavelet decomposition captures multiscale irregularities, reinforcing the interpretation of HFD peaks and revealing spatial complexity patterns. The results show that the Fırtına River exhibits high HFD zones coinciding with flood damage such as embankment collapses, bridge scour, and road blockages. In contrast, the Görele River, despite higher rainfall totals, shows lower fractal values and limited damage due to its more regular morphological form that disperses flow energy. The findings demonstrate that morphological irregularities derived from fractal and wavelet analyses can serve as practical indicators of flood-induced fragility. The proposed framework offers a data-efficient tool for identifying critical segments of transport networks and improving flood resilience in mountainous and risk-prone regions.