Article (Scientific journals)
Parameter identification of the STICS crop model, using an accelerated formal MCMC approach
Dumont, Benjamin; Leemans, Vincent; Mansouri, Majdi et al.
2014In Environmental Modelling and Software, 52, p. 121-135
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Keywords :
Crop model; Parameter estimation; Bayes; STICS; DREAM
Abstract :
[en] This study presents a Bayesian approach for the parameters’ identification of the STICS crop model based on the recently developed Differential Evolution Adaptive Metropolis (DREAM) algorithm. The posterior distributions of nine specific crop parameters of the STICS model were sampled with the aim to improve the growth simulations of a winter wheat (Triticum aestivum L.) culture. The results obtained with the DREAM algorithm were initially compared to those obtained with a Nelder-Mead Simplex algorithm embedded within the OptimiSTICS package. Then, three types of likelihood functions implemented within the DREAM algorithm were compared, namely the standard least square, the weighted least square, and a transformed likelihood function that makes explicit use of the coefficient of variation (CV). The results showed that the proposed CV likelihood function allowed taking into account both noise on measurements and heteroscedasticity which are regularly encountered in crop modelling
Disciplines :
Computer science
Agriculture & agronomy
Author, co-author :
Dumont, Benjamin  ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Mécanique et construction
Leemans, Vincent ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Mécanique et construction
Mansouri, Majdi ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Mécanique et construction
Bodson, Bernard ;  Université de Liège - ULiège > Sciences agronomiques > Phytotechnie des régions tempérées
Destain, Jean-Pierre ;  Université de Liège - ULiège > Sciences agronomiques > Phytotechnie des régions tempérées
Destain, Marie-France ;  Université de Liège - ULiège > Sciences et technologie de l'environnement > Mécanique et construction
Language :
English
Title :
Parameter identification of the STICS crop model, using an accelerated formal MCMC approach
Publication date :
February 2014
Journal title :
Environmental Modelling and Software
ISSN :
1364-8152
Publisher :
Elsevier Science
Volume :
52
Pages :
121-135
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Suivi en temps réel de l’environnement d’une parcelle agricole par un réseau de micro-capteurs en vue d’optimiser l’apport en engrais azotés
Funders :
SPW DG03-DGARNE - Service Public de Wallonie. Direction Générale Opérationnelle Agriculture, Ressources naturelles et Environnement [BE]
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