Morphometric analysis of low mountains for mapping flash flood susceptibility in headwaters

• DOI: 10.1007/s11069-022-05513-6
• Publication Date: 2022-08-06T11:03:46Z
• Authors: Balázs Víg; Szabolcs Ákos Fábian; Szabolcs Czigány; Ervin Pirkhoffer; Ákos Halmai; István Péter Kovács; Gábor Varga; József Dezső; Gábor Nagy; Dénes Lóczy
• Keywords: Flash flood; Drainage density

Abstract Morphometric indices from high-resolution DEMs can contribute to the estimation of flash flood susceptibility in mountainous areas. We have screened 25 morphometric commonly used literature, and based on a correlation matrix, selected those which showed strongest relationship with generation: area ( A ), drainage texture (Rt), density (Dd), elongation ratio (Re), form factor (Ff), lemniscate method k Gravelius coefficient (GC), forested (Fa) relief (Rr). Among them Dd, Rt Rr had direct impact generation, while , Re, Fa, Ff, GC are inverse intensity floods. Our summary map shows prioritization watersheds scale 0 9. The ranking was empirically verified using hydrological data (20-year water regime obtained 14 official stream gauges). conclusions only partially agree former observations may be explained by particular lithology morphology Mecsek Mountains. Since lower sections urbanized, for optimal watershed management more detailed GIS analyses anthropogenic controls hazard needed future.