Work

Brief communication: Threshold and probability. The conceptual difference between ID thresholds for landslide initiation and IDF curves

Year: 2025

Type: article

Abstract: . Intensity-duration (ID) thresholds are used to identify rainfall conditions likely to initiate landslides. They consider the average rain intensity observed over the entire length (called duration) of user-defined events. Intensity-duration-frequency (IDF) curves assign a probability to the intensity of precipitation observed over fixed-length temporal windows (also called durations). As the term duration refers to different concepts, ID thresholds and IDF curves cannot be compared directly, and should better not be plotted in one figure, and IDF curves should not be used to quantify the exceedance probability of ID thresholds.

Source: Natural hazards and earth system sciences

DOI: 10.5194/nhess-25-5055-2025

Authors: Francesco Marra, Eleonora Dallan, Marco Borga, Roberto Greco, Thom Bogaard

Institutions: University of Padua, University of Campania "Luigi Vanvitelli", Delft University of Technology

Language: English

Topic: Landslides and related hazards

Subfield: Management, Monitoring, Policy and Law

Field: Environmental Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,553

Funders: Dipartimenti di Eccellenza, European Commission, Ministero dell'Università e della Ricerca