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Articles

Muskingum Method, EXTRAN and ONE-D for Routing Unsteady Flows in Open Channels

Pages 481-498 | Published online: 23 Jan 2013
 

Abstract

In the present study the numerical modelling aspects of unsteady flow in simple and compound channels are examined through the application to a laboratory data set of the simple hydrologic routing method Muskingum and the unsteady flow dynamic routing models EXTRAN and ONE-D. Model simulations were compared and evaluated by applying various statistical measures to determine the degree of goodness-of-fit between simulated and observed hydrographs. In terms of overall performance, the Muskingum method proved to be a simple and reliable method avoiding complicated mathematical and numerical computations for the cases considered.

Dans la présente étude, les aspects modélisation numérique de débit non permanent dans les canaux simples et composés sont examinés au moyen de l’application à une série de données de laboratoire de la méthode Muskingum (méthode hydrologique simple) et des modèles d’acheminement dynamique de débit non permanent EXTRAN et ONED. Les simulations de modèle ont été comparées et évaluées par l’application de diverses mesures statistiques afin de déterminer le degré de validité de l’ajustement entre les hydrographes simulés et observés. En fait de rendement global, la méthode Muskingum s’est avérée une méthode simple et fiable permettant d’éviter les calculs mathématiques et numériques compliqués pour les cas à l’étude.

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