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Reactive contaminant transport modeling using analytic element flow solutions.

机译：使用分析元素流解决方案进行反应性污染物迁移建模。

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摘要

A new approach to modeling reactive contaminant transport in groundwater is developed and evaluated. The approach is unique in that it uses a grid- or mesh-independent representation of model input parameters, including continuous velocities, dispersion coefficients, and saturated thickness values obtained directly from analytic element groundwater flow solutions.; The approach is realized within a suite of revised finite element, finite difference, and characteristic methods that are designed to improve the accuracy and reduce the computational costs of complex reactive vertically-averaged transport simulations in surficial aquifers. These methods are implemented in a fully object-oriented parallel-friendly software framework, benchmarked against existing analytic and numerical solutions, tested against traditional discrete methods, and applied to a set of difficult field-scale test problems.; It was found that the majority of the methods benefited from continuous representation, and that the use of the analytic element method can facilitate the development of computationally efficient multi-scale reactive transport models.; Importantly, this work represents the first thorough implementation of a linkage between reactive contaminant transport models and the analytic element method for modeling groundwater flow, and the first detailed analysis of such a linkage.
机译：开发和评估了一种模拟地下水中反应性污染物运移的新方法。该方法的独特之处在于，它使用模型输入参数的独立于网格或网格的表示形式，包括直接从分析元素地下水流解中获取的连续速度，弥散系数和饱和厚度值。该方法是在一组经过修改的有限元，有限差分和特征方法中实现的，这些方法旨在提高精度并减少表面含水层中复杂的反应性垂直平均输运模拟的计算成本。这些方法在完全面向对象的并行友好软件框架中实现，以现有的分析和数值解决方案为基准，以传统的离散方法进行测试，并应用于一系列困难的现场规模测试问题。发现大多数方法都受益于连续表示，并且分析元素方法的使用可以促进计算效率高的多尺度反应性输运模型的发展。重要的是，这项工作代表了活性污染物迁移模型与用于模拟地下水流的分析元素方法之间的联系的首次彻底实现，并且是对这种联系的首次详细分析。

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