Seeking genericity in the selection of parameter sets: impact on hydrological model efficiency

Une sélection des jeux de paramètres basée sur la recherche de la généricité: impact sur les performances d'un modèle hydrologique

Andréassian, V. ; Bourgin, F. ; Oudin, L. ; Mathevet, T. ; Perrin, C. ; Lerat, J. ; Coron, L. ; Berthet, L.

Type de document
Article de revue scientifique à comité de lecture
Langue
Anglais
Affiliation de l'auteur
IRSTEA ANTONY UR HBAN FRA ; IRSTEA ANTONY UR HBAN FRA ; UNIVERSITE PIERRE ET MARIE CURIE UMR SISYPHE PARIS FRA ; EDF DGT GRENOBLE FRA ; IRSTEA ANTONY UR HBAN FRA ; BUREAU OF METEOROLOGY CANBERRA AUS ; IRSTEA ANTONY UR HBAN FRA ; DREAL AUVERGNE FRA
Année
2014
Résumé / Abstract
This paper evaluates the use of a small number of generalist parameter sets as an alternative to classical calibration. Here parameter sets are considered generalist when they yield acceptable performance on a large number of catchments. We tested the genericity of an initial collection of 106 parameter sets sampled in the parameter space for the four-parameter GR4J rainfall-runoff model. A short list of 27 generalist parameter sets was obtained as a good compromise between model efficiency and length of the short list. A different data set was used for an independent evaluation of a calibration procedure, in which the search for an optimum parameter set is only allowed within this short list. In validation mode, the performance obtained is inferior to that of a classical calibration, but when the amount of data available for calibration is reduced, the generalist parameter sets become progressively more competitive, with better results for calibration series shorter than 1 year.
Source
Water Resources Research, vol. 50, num. 10, p. 8356 - 8366

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