Probe for Measuring Groundwater Velocity at the Centimeter Scale

W.  LABAKY; J.F.  DEVLIN; R.W.  GILLHAM

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Probe for Measuring Groundwater Velocity at the Centimeter Scale

机译：以厘米为单位测量地下水速度的探头

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A novel method of measuring small-scale groundwater velocities in unconsolidated noncohesive media uses the travel time of a tracer pulse between an injection port and two detectors located on the surface of a cylindrical probe, called a point-velocity probe (PVP), as the basis for velocity estimation. The direction and magnitude of the water velocity vector were determined to within ±9% of magnitude and ±8° in direction, on average, in ten laboratory tank tests conducted with the PVP, when the velocities were between 5 and 98 cm/ day. Numerical simulations supported the accuracy of the underlying theory for interpretation of the PVP data and indicated that the technology is capable of measuring velocity at a very fine scale (0.5 cm around the circumference). The benchtop and modeling investigations indicated that the probe is moderately sensitive to the condition of the porous medium immediately next to the cylinder surface, suggesting that challenges exist for the deployment of the instrument in the field.

机译：一种测量未固结非粘性介质中小规模地下水速度的新颖方法，是利用注入口与位于圆柱形探针表面上的两个探测器（称为点速度探针（PVP））之间的示踪脉冲的行进时间作为目标。速度估计的基础。在使用PVP进行的十次实验室水箱测试中，当速度在5到98厘米/天之间时，水速矢量的方向和大小平均确定在幅度的±9％以内，方向的平均值为±8°。数值模拟支持了用于解释PVP数据的基础理论的准确性，并表明该技术能够以非常精细的比例（圆周0.5厘米）测量速度。台式和模型研究表明，该探头对紧邻圆柱体表面的多孔介质的状况具有中等敏感性，这表明在现场部署该仪器存在挑战。

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来源
《Environmental Science & Technology》 |2007年第24期|p.8453-8458|共6页
作者
W. LABAKY; J.F. DEVLIN; R.W. GILLHAM;
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作者单位

Schlumberger Water Services, Waterloo, Ontario, Canada;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类环境化学;
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Probe for Measuring Groundwater Velocity at the Centimeter Scale

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