层层的含水层的有效垂直异构性
1Water Management Department, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, The Netherlands.
Ground water
|August 16, 2024
概括
沉积层含水层的有效异构性取决于地下水流条件和层次序列,而不仅仅是液压导电性. 建议在模型校准时使用10的中位离异性因子.
科学领域:
- 水文地质学 水文地质学
- 计算建模计算建模
- 地质科学 地质科学
背景情况:
- 沉积层含水层通常包括具有不同液压导电性的多层材料.
- 同质但异质的模型通常用于地下水流量模拟.
- 异构系数 (水平到垂直的液压导电率比) 通常被认为是10.
研究的目的:
- 为了确定分层沉积水层的有效异构性.
- 为了研究层次序列和流场对有效异构的影响.
- 在地下水建模中评估固定异构度因子的有效性.
主要方法:
- 数字实验模拟地下水流向部分透的运河和井的数值实验.
- 分析了1000个随机实现的400个水平层,具有不同的导电性.
- 在实现中改变层次的序列,而不是它们的内在导电性.
主要成果:
- 有效的含水层异构性是一个流场依赖的参数.
- 根据层次序列和流量条件,异性质值有显著的变化 (5到50).
- 平均有效异性质大约为10,与相当的异性质定义保持一致.
结论:
- 恒定异构系数为10是对异构含水层模型校准的合理起点.
- 有效的异质性不仅仅是含水层物质的属性,也是模拟流动模式的属性.
- 液压导电性变化的顺序显著影响了有效的含水层异构性.
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