Article Dans Une Revue (Data Paper) Earth System Science Data Année : 2025

Benchmark dataset for hydraulic simulations of flash floods in the French Mediterranean region

Juliette Godet
Eric Gaume
Philippe Davy
Olivier Payrastre

Résumé

The absence of validation or comparison data for verifying flood mapping methods poses a significant challenge in developing operational hydraulic approaches. This article aims to address this gap by presenting a benchmark dataset for flash flood mapping in the French Mediterranean region. The dataset described in this paper (https://doi.org/10.57745/IXXNAY, Nicolle et al., 2024) includes flood hazard maps and simulation results of three actual flash flood events, all computed in a steady regime at a 5 m resolution using a 2D SWE (shallow water equation) model (neglecting inertia) named Floodos (Davy et al., 2017). Additionally, it includes the input data necessary (digital terrain models, inflow discharges, hydrographic network) for conducting similar simulations with other hydrodynamic modelling approaches in both steady and unsteady regimes. A comprehensive validation dataset, comprising observed flood extents, high water marks, and rating curves, is also provided, enabling a detailed evaluation of 2D hydraulic simulation results. The simulation results from Floodos, compared against stage-discharge rating curves available at gauging stations, yielded highly encouraging outcomes. The median error (sim.-obs.) was -0.04 m for the 2-year return period and -0.14 m across all simulated return periods, ranging from 2 to 1000 years.

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Cite 10.57745/IXXNAY Jeu de données NICOLLE, P., HOCINI, N., GODET, J., PONS, F., PAYRASTRE, O., ARNAUD, P., & LAGUE, D. (2024). Benchmark dataset for hydraulic simulations of flash floods in the French Mediterranean region [Data set]. Recherche Data Gouv. https://doi.org/10.57745/IXXNAY

Dates et versions

insu-05150377 , version 1 (08-07-2025)

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Juliette Godet, Pierre Nicolle, Nabil Hocini, Eric Gaume, Philippe Davy, et al.. Benchmark dataset for hydraulic simulations of flash floods in the French Mediterranean region. Earth System Science Data, 2025, 17 (6), pp.2963-2983. ⟨10.5194/essd-17-2963-2025⟩. ⟨insu-05150377⟩
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