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首页> 外文期刊>Geosphere >Comparison of transport simulations and equivalent dispersion coefficients in heterogeneous media generated by different numerical methods: A genesis model and a simple geostatistical sequential Gaussian simulator
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Comparison of transport simulations and equivalent dispersion coefficients in heterogeneous media generated by different numerical methods: A genesis model and a simple geostatistical sequential Gaussian simulator

机译:不同数值方法在非均质介质中的传输模拟和等效弥散系数的比较:成因模型和简单的地统计顺序高斯模拟器

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摘要

This article presents a genesis method for characterizing heterogeneous media representing alluvial deposits. This method simulates the main steps of the medium genesis for meandering, braided, and incising streams and generates facies, which are then translated into hydraulic conductivities to simulate flow and transport. In order to compare this "genetic" model with other methods commonly used to characterize heterogeneous media, a basic sequential Gaussian indicator method was applied to the same site: a 5200-m-long reach of the Aube River floodplain (France). Ten different geostatistical realizations were generated. An equivalent homogeneous representation was also included. Flow and transport simulations in the different heterogeneous numerical media were conducted with Visual MODFLOW. The results were analyzed and compared in terms of permeability fields, plume spreading, and equivalent longitudinal dispersion. Emphasis is on the ability of the genetic model to represent continuous channels that can serve either as conduits or as barriers to flow, which, we think, is unique.
机译:本文介绍了一种用于表征代表冲积沉积物的异质 介质的成因方法。此方法模拟 弯曲,编织, 和切开流的介质生成的主要步骤,并生成相,然后将其转换为水力传导率。为了模拟流动和传输。 为了将该“遗传”模型与其他通常用于表征异构介质的方法 进行比较,一种基本的顺序 Gaussian指示器方法已应用于同一地点:奥伯河漫滩(法国)长5200米( )。生成了十个不同的地统计 实现。还包括等效的均质表示形式 。使用Visual MODFLOW在不同的 数值数据介质中进行了流动和传输模拟。 根据渗透率场,羽流对结果进行了分析和比较。扩展和等效的纵向分散。 重点在于遗传模型表示 连续通道的能力,该通道可以用作管道或 屏障流动,我们认为这是独一无二的。

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  • 来源
    《Geosphere》 |2006年第5期|275-286|共12页
  • 作者单位

    Laboratoire des Sciences du Climat et de l'Environnement, Unité Mixte de Recherche, Commissariat à l'Energie Atomique—Centre National de la Recherche Scientifique, Orme des Merisiers, bat. 709, 91191 Gif sur Yvette Cedex, France;

    University of Poitiers, Unité Mixte de Recherche, 6532 Hydrasa of Centre National de la Recherche Scientifique, 40 Avenue du Recteur Pineau, 86022 Poitiers Cedex, France;

    University Paris VI, Unité Mixte de Recherche, Sisyphe of Centre National de la Recherche Scientifique, 4 place Jussieu, 75252 Paris Cedex 05, France;

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