Skip to Main content Skip to Navigation
Journal articles

Exploring the signature of climate and landscape spatial variabilities in flash flood events: Case of the 8–9 September 2002 Cévennes-Vivarais catastrophic event

Abstract : This paper investigates the signature of climate and landscape spatial variabilities on flash-floods events. Through the case of the catastrophic 8–9 September 2002 Cévennes-Vivarais event, the impact of the space-time structure of the rainfall on the distributed hydrological response is evaluated. Comparisons are made with other spatial variabilities that may also contribute to the flash-flood generation such as initial soil moisture condition, topography, landscape characteristics, hydraulic processes. A model-based approach is suggested and was applied on 19 catchments. It is shown that the spatial variability of rainfall and of the initial soil moisture conditions were both of first order in the flash-floods generation and that the spatial variability of landscape properties were of second order. This methodology will be applied on other extreme hydro-meteorological events surveyed by the OHM-CV (Cévennes-Vivarais Mediterranean Hydrometeorological Observatory), with the aim of providing clues on processes that should be particularly focused when measuring and simulating such intense mesoscale meteorological events.
Complete list of metadatas

https://hal-insu.archives-ouvertes.fr/insu-00386865
Contributor : Thierry Pellarin <>
Submitted on : Friday, May 22, 2009 - 10:54:45 AM
Last modification on : Friday, September 25, 2020 - 11:02:44 AM

Links full text

Identifiers

Collections

Citation

Matthieu Le Lay, Georges-Marie Saulnier. Exploring the signature of climate and landscape spatial variabilities in flash flood events: Case of the 8–9 September 2002 Cévennes-Vivarais catastrophic event. Geophysical Research Letters, American Geophysical Union, 2007, 34, pp.L13401. ⟨10.1029/2007GL029746⟩. ⟨insu-00386865⟩

Share

Metrics

Record views

181