Parameter Optimization in Groundwater using Proper Orthogonal Decomposition as a Reduced Modeling Technique

Abstract : This paper deals with different approaches of applying Proper Orthogonal Decomposition in the field of groundwater flow, specifically the Richards equation, which is a convection-diffusion partial differential equation governing the behaviour of unsaturated fluid flow through a porous medium. The motivation for this research is the need to reduce computational complexity in inverse modelling studies, where a significant number of simulations are needed to determine suitable model parameters. Three different methods of implementing Proper Orthogonal Decomposition are explored. The first method is the Petrov-Galerkin method, a method well suited to speeding up linear problems. The second method is a "Hybrid" method, and proposes a linearization of all non-linear functions, building upon the Petrov-Galerkin approach. As such, it is suitable for use in the non-saturated groundwater zone. The third method combines the use of kriging and Proper Orthogonal to create a non-intrusive model for comparison purposes. With these three methods, the suitability of Proper Orthogonal as a reduced modelling method for unsaturated groundwater flow is shown.
Type de document :
Communication dans un congrès
5th International Conference from Scientific Computing to Computational Engineering (5th IC-SCCE), Jul 2012, Athène, Greece. 2012
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https://hal-emse.ccsd.cnrs.fr/emse-00740968
Contributeur : Florent Breuil <>
Soumis le : jeudi 11 octobre 2012 - 14:46:25
Dernière modification le : mardi 23 octobre 2018 - 14:36:09

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  • HAL Id : emse-00740968, version 1

Citation

John N. Wise, G. Venter, Mireille Batton-Hubert, Eric Touboul. Parameter Optimization in Groundwater using Proper Orthogonal Decomposition as a Reduced Modeling Technique. 5th International Conference from Scientific Computing to Computational Engineering (5th IC-SCCE), Jul 2012, Athène, Greece. 2012. 〈emse-00740968〉

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