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    非均质介质中地下水流动与溶质运移模拟——问题与挑战

    TsangChin-Fu

    TsangChin-Fu, 2000. 非均质介质中地下水流动与溶质运移模拟——问题与挑战. 地球科学, 25(5): 443-450.
    引用本文: TsangChin-Fu, 2000. 非均质介质中地下水流动与溶质运移模拟——问题与挑战. 地球科学, 25(5): 443-450.
    Tsang Chin-Fu, 2000. MODELING GROUNDWATER FLOW AND MASS TRANSPORT IN HETEROGENEOUS MEDIA: ISSUES AND CHALLENGES. Earth Science, 25(5): 443-450.
    Citation: Tsang Chin-Fu, 2000. MODELING GROUNDWATER FLOW AND MASS TRANSPORT IN HETEROGENEOUS MEDIA: ISSUES AND CHALLENGES. Earth Science, 25(5): 443-450.

    非均质介质中地下水流动与溶质运移模拟——问题与挑战

    基金项目: 

    美国能源部项目 DE-AC03-76SF00098

    详细信息
      作者简介:

      TsangChin-Fu:Chin-Fu Tsang, 男, 研究员, 1969年获美国加州大学博士学位, 现任美国Lawrence Berkeley国家实验室地球科学部主任, 主要从事核废物地质处置、地下水流和溶质运移数值模拟研究

    • 中图分类号: P641.2

    MODELING GROUNDWATER FLOW AND MASS TRANSPORT IN HETEROGENEOUS MEDIA: ISSUES AND CHALLENGES

    • 摘要: 对大空间尺度和长时间跨度的地下水流动及污染物质运移进行预测的需求, 使水文地质研究面临异乎寻常的挑战.这些需求来自于对核废料地质储放方法的安全性评价、地下水污染状况评价及其治理方案的选择.流动系统的非均质性是地下水流动及物质运移模拟中最主要的困难之一, 这种困难来自对非均质系统进行特征描述(通过原位观测实现)、概念化及模拟.评述了非均质介质中流动运移模拟的一些重要问题与挑战, 讨论了解决的途径.讨论的主题包括: 动力流动的沟道化, 示踪剂穿透曲线, 裂隙岩石中流体流动的多尺度, 观测的不同尺度, 模拟、预测与非均质性以及系统特征描述和预测性模拟的分析.

       

    • 图  1  二维非均质介质中流动沟道化随σ的变化

      Fig.  1.  Emergence of flow channeling, under pressure step applied from the top to the bottom boundary, as a function of σ for a 2D heterogeneous medium

      a.λ′=0.15, σ=0.5;b.λ′=0.15, σ=2.0;c.λ′=0.15, σ=6.0

      图  2  二维非均质介质中流动沟道化随λ′的变化

      Fig.  2.  Emergence of flow channeling, under pressure step applied from the top to the bottom boundary, as a function of λ′ for a 2D heterogeneous medium

      a.λ′=0.015, σ=2.0;b.λ′=0.15, σ=2.0;c.λ′=0.3, σ=2.0

      图  3  不同标准偏差σ值和相关长度与路程长度比λ′为0.075 (a), 0.30 (b) 对应的穿透曲线

      图  4  裂隙岩石中流动和运移的多步骤弥散度

      图  5  隙宽变化的裂隙网络中示踪剂穿透曲线(裂隙间距在4~8 m范围变化)

      Fig.  5.  Tracer breakthrough curves for a fracture network with variable apertures for each fracture

      图  6  预测性模拟中不同尺度的图示

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    出版历程
    • 收稿日期:  2000-06-20
    • 刊出日期:  2000-09-25

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