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- Title
Seeking genericity in the selection of parameter sets: Impact on hydrological model efficiency.
- Authors
Andréassian, Vazken; Bourgin, François; Oudin, Ludovic; Mathevet, Thibault; Perrin, Charles; Lerat, Julien; Coron, Laurent; Berthet, Lionel
- 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.
- Subjects
WATERSHEDS; RESERVOIRS; RAINFALL; RUNOFF; HYDROLOGY
- Publication
Water Resources Research, 2014, Vol 50, Issue 10, p8356
- ISSN
0043-1397
- Publication type
Article
- DOI
10.1002/2013WR014761