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Etude du rôle hydrologique d'une tourbière de montagne: modélisation comparée de couples "averse-crue" sur deux bassins versants du Mont-Lozère

Title data

Cognard-Plancq, Anne-Laure ; Bogner, Christina ; Marc, Vincent ; Lavabre, Jacques ; Martin, Claude ; Didon-Lescot, Jean-François:
Etude du rôle hydrologique d'une tourbière de montagne: modélisation comparée de couples "averse-crue" sur deux bassins versants du Mont-Lozère.
In: Etudes de Géographie Physique. Vol. 31 (2004) . - pp. 3-15.
ISSN 0769-1750

Official URL: Volltext

Abstract in another language

The impact of a toeslope humid area upon high flows was studied in a sub-Mediterranean mountainous catchment (Peschio catchment, Mont-Lozère) using a lumped rainfall-runoff model (GR3H).The simulations were carried out at a hourly time step. The model performances and parameters werecompared with those computed on an adjacent bog-free catchment (Samouse catchment) used as reference.From the study of 24 flood events recorded between January 2000 and December 2001, the overall qualityof the simulations was found to be better for the reference catchment : 1 and 9 bad fittings for the Samouse and Peschio catchments, respectively. The shape of the instantaneous unit hydrographs corroborated the results from previous study : the humid area induces a delay in the catchment response and smoothes the flood event. However, this behaviour is subdued to a seasonal evolution, with a gradual increase of thecatchment lag time while the bog dries up. Thus, the lag time on Peschio varied from 2 hours in winter to 14 hours in august 2000. By comparison, the lag time on the reference catchment kept values close to 1,5 h.

Further data

Item Type: Article in a journal
Refereed: No
Additional notes: BAYCEER71693
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Ecological Modelling
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 30 Sep 2015 05:55
Last Modified: 10 Mar 2016 14:26
URI: https://eref.uni-bayreuth.de/id/eprint/19848