Hydrogeological Methods for Estimation of Spatial Variations in Hydraulic Conductivity
Hydrogeological Methods for Estimation of Spatial Variations in Hydraulic Conductivity
复制标题
估算水力电导率空间变化的水文地质方法
DOI：
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发表时间：
2005
期刊：
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通讯作者：
J. Butler
中科院分区：
文献类型：
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作者：
J. Butler
事实上，每次水文地质调查都需要估算水力传导率 (K)，该参数用于表征水在地下流动的难易程度。对于供水调查，对相对较大体积的含水层进行平均 K 的单一估计通常就足够了。然而，对于水质调查来说，这种估计的价值往往有限。大量工作表明，K 的空间变化在控制饱和流系统中的溶质运动中发挥着重要作用（例如，Sudicky 和 Huyakorn，1991；Zheng 和 Gorelick，2003）。大量研究表明，需要有关此类变化的信息才能获得污染物迁移的可靠预测并设计有效的修复系统。人们使用了多种方法来努力获取这些信息。本章的主要目的是描述这些方法并评估它们可以提供的信息的质量。后面的章节将讨论地球物理学如何增强通过这些方法获得的信息。
Virtually every hydrogeologic investigation requires an estimate of hydraulic conductivity (K), the parameter used to characterize the ease with which water flows in the subsurface. For water-supply investigations, a single estimate of K averaged over a relatively large volume of an aquifer will usually suffice. However, for water-quality investigations, such an estimate is often of limited value. A large body of work has demonstrated that spatial variations in K play an important role in controlling solute movement in saturated flow systems (e.g., Sudicky and Huyakorn, 1991; Zheng and Gorelick, 2003). Numerous studies have shown that information about such variations is required to obtain reliable predictions of contaminant transport and to design effective remediation systems. Varieties of methods have been used in efforts to acquire this information. The primary purpose of this chapter is to describe these methods and assess the quality of the information that they can provide. Later chapters will discuss how geophysics can augment the information obtained with these approaches.