Evaluation of Vertical Variations in Hydraulic Conductivity in Unconsolidated Sediments
Evaluation of Vertical Variations in Hydraulic Conductivity in Unconsolidated Sediments
复制标题
松散沉积物中水力传导率垂直变化的评估
DOI：
10.1111/j.1745-6584.2011.00854.x
复制
发表时间：
2012
期刊：
影响因子：
2.6
通讯作者：
P. Dietrich
中科院分区：
文献类型：
--
作者：
M. Dietze;P. Dietrich
关于水力传导度(K)垂直变化的详细信息对于描述受污染地点的地下水运动动态或作为用于建模的输入数据是必不可少的。应该确定高垂直分辨率的K值，因为K在水平方向上往往比在垂直方向上更连续。用最新研制的直推式注水测井仪可以测定浅层疏松沉积物中的K和垂直方向的K。通过这种方法获得的信息可以作为K的替代，并且必须进行校准，以获得测量的垂直剖面的定量K值。在这项研究中，我们进行了直推式土壤采样、筛分分析和直推式段塞试验，以获得垂直高分辨率的K值。利用直推式段塞测试结果，可以成功地确定直推式注水测井仪获得的定量K值。由于筛分方法的固有局限性，筛分分析的结果与测井结果的一致性较低。
Detailed information on vertical variations in hydraulic conductivity (K) is essential to describe the dynamics of groundwater movement at contaminated sites or as input data used for modeling. K values in high vertical resolution should be determined because K tends to be more continuous in the horizontal than in the vertical direction. To determine K in shallow unconsolidated sediments and in the vertical direction, the recently developed direct‐push injection logger can be used. The information obtained by this method serves as a proxy for K and has to be calibrated to obtain quantitative K values of measured vertical profiles. In this study, we performed direct‐push soil sampling, sieve analyses and direct‐push slug tests to obtain K values in vertical high resolution. Using the results of direct‐push slug tests, quantitative K values obtained by the direct‐push injection logger could be determined successfully. The results of sieve analyses provided lower accordance with the logs due to the inherent limitations of the sieving method.