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A RAM-economizing domain decomposition technique for regional high-resolution groundwater simulation

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Hydrogeology Journal : Volume 11, Issue 1, February 2003

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A RAM-economizing domain decomposition technique for regional high-resolution groundwater simulation

Content Provider	Springer Nature Link
Author	Gräsle, W. Kessels, W.
Copyright Year	2003
Abstract	A major limitation of the use of high-resolution groundwater models on a regional scale for resource management by water companies is the excessive RAM requirements of such models which surpass the capacity of today's PCs. A strategy is presented to overcome this problem by using overlapping domain decomposition techniques. Furthermore, because very long computing time is the bottleneck for the practical use of this technique for large groundwater models, an analysis is also presented of a number of methods implemented to increase calculation performance. The approach presented here is characterized by a fairly simple structure that represents a generalized relaxation algorithm. It can be adapted for use with finite element as well as with finite difference methods.Une limitation majeure de la mise en oeuvre de modèles de nappe à haute résolution à l'échelle régionale pour la gestion des ressources en eau par les sociétés d'exploitation de l'eau est la grande gourmandise en mémoire vive de ces modèles, qui dépasse la capacité des micro-ordinateurs actuels. Une stratégie est présentée afin de s'affranchir de ce problème en utilisant des techniques de décomposition de domaine par superposition. De plus, parce que le très long temps de calcul est le problème de fond de l'utilisation pratique de cette technique pour les grands modèles de nappes, une analyse est également présentée d'un certain nombre de méthodes développées pour accroître les performances de calcul. L'approche présentée ici est caractérisée par une structure assez simple qui représente un algorithme généralisé de relaxation. Il peut être adapté à la mise en œuvre des méthodes aux éléments finis, comme de celles aux différences finies.La necesidad excesiva de memoria RAM es una de las mayores limitaciones en el uso de modelos de aguas subterráneas de alta resolución a escala regional para las compañías de gestión de recursos hídricos, ya que se sobrepasa la capacidad de las computadoras personales actuales. Se presenta una estrategia para vencer este problema mediante el uso de técnicas de descomposición de dominios superpuestos. Más aún, debido a que los elevados tiempos de cálculo suponen un cuello de botella para la aplicación práctica de esta técnica a modelos extensos, se presenta también un análisis de los métodos implementados para mejorar su rendimiento. El enfoque descrito aquí se caracteriza por una estructura relativamente sencilla que representa un algoritmo generalizado de relajación, que puede ser adaptado a su uso tanto en modelos de elementos finitos como de diferencias finitas.
Starting Page	304
Ending Page	310
Page Count	7
File Format	PDF
ISSN	14312174
Journal	Hydrogeology Journal
Volume Number	11
Issue Number	2
e-ISSN	14350157
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-03-05
Publisher Institution	International Association of Hydrogeologists
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Water Science and Technology

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