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首页> 外文期刊>Journal of Hydroinformatics >Two-dimensional numerical modeling of chemical transport–transformation in fluvial rivers: formulation of equations and physical interpretation
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Two-dimensional numerical modeling of chemical transport–transformation in fluvial rivers: formulation of equations and physical interpretation

机译：河流河流化学迁移-转化的二维数值模拟：方程的表示和物理解释

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摘要

Based on previous work on the transport–transformation model of heavy metal pollutants in fluvialnrivers, this paper presents the formulation of a two-dimensional model to describe chemicalntransport–transformation in fluvial rivers by considering basic principles of environmentalnchemistry, hydraulics and mechanics of sediment transport and recent developments along withnthree very simplified test cases. The model consists of water flow governing equations, sedimentntransport governing equations, transport–transformation equation of chemicals and convection–ndiffusion equations of sorption–desorption kinetics of particulate chemical concentrations onnsuspended load, bed load and bed sediment. The chemical transport–transformation equation isnbasically a mass balance equation. It demonstrates how sediment transport affects transport–ntransformation of chemicals in fluvial rivers. The convection–diffusion equations of sorption–ndesorption kinetics of chemicals, being an extension of batch reactor experimental results, takenboth physical transport, i.e. convection and diffusion, and chemical reactions, i.e. sorption–ndesorption into account. The effects of sediment transport on chemical transport–transformationnwere clarified through three simple examples. Specifically, the transport–transformation ofnchemicals in a steady, uniform and equilibrium sediment-laden flow was calculated by applying thisnmodel, and results were shown to be rational. Both theoretical analysis and numerical simulationnindicated that the transport–transformation of chemicals in sediment-laden flows with anclay-enriched riverbed possesses not only the generality of common tracer pollutants, but alsoncharacteristics of transport–transformation induced by sediment motion. Future work will benconducted to present the validation/application of the model with available data.
机译：在先前关于黄河中重金属污染物的迁移转化模型的工作的基础上，本文提出了一个二维模型，该模型通过考虑环境化学，泥沙运移的水力学和力学原理以及河床河流中河流化学转化的转化来描述。最近的发展以及三个非常简单的测试用例。该模型由水流控制方程式，泥沙输送控制方程式，化学物质的运输-转换方程式和颗粒化学浓度在悬浮负荷，床层负荷和床层沉积物上的吸附-解吸动力学的对流-扩散方程组成。化学迁移-转化方程基本上是质量平衡方程。它展示了沉积物的运输如何影响河流中化学物质的运输-正转变。化学品吸附-解吸动力学的对流-扩散方程是间歇式反应器实验结果的扩展，同时考虑了物理传输（即对流和扩散）和化学反应（吸附-解吸）。通过三个简单的例子证实了沉积物迁移对化学迁移转化的影响。具体而言，通过应用该模型计算了稳定，均匀且平衡的充满泥沙流中化学物质的迁移转化，结果表明是合理的。理论分析和数值模拟均表明，含泥土富集河床的含沙流中化学物质的运移转化不仅具有常见的示踪污染物的普遍性，而且还具有由泥沙运动引起的运移转化的特征。将进行未来的工作，以提供可用数据的模型验证/应用。

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  • 来源
    《Journal of Hydroinformatics》 |2009年第2期|p.106-118|共13页
  • 作者

    Liang Huang Sui;

  • 作者单位

    Sui Liang HuangNumerical Simulation Group for WaterEnvironment,Key Laboratory of Pollution Processes andEnvironmental Criteria of Ministry of Education,Tianjin Key Laboratory of EnvironmentalRemediation and Pollution Control,College of EnvironmentalScience and Engineering,Nankai University, 300071 Tianjin,ChinaTel./Fax: +86 22 2350 3423E-mail: slhuang@nankai.edu.cn orslhuang_china@yahoo.com.cn;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    chemical, fluvial rivers, numerical modeling, transport–transformation,water–sediment–pollutants interaction;

    机译：化工;河流河流;数值模拟;运输-转化;水-泥沙-污染物相互作用;

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