Ground Penetrating Radar Imaging of an Aquifer During a Pumping Test
Ground Penetrating Radar Imaging of an Aquifer During a Pumping Test
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抽水测试期间含水层的探地雷达成像
DOI：
10.1111/j.1745-6584.2000.tb00249.x
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发表时间：
2000
期刊：
影响因子：
2.6
通讯作者：
D. Rudolph
中科院分区：
文献类型：
--
作者：
A. Endres;W. P. Clement;D. Rudolph
我们使用探地雷达 (GPR) 剖面图对抽水测试期间无承压含水层的时间和空间响应进行了成像。特别是，我们观察到了上覆残余饱和材料和下面的水饱和毛细管边缘之间的过渡区中发生的含水量变化所产生的反射的瞬态行为。测量该反射的渐进到达时间延迟并用于推断抽水测试期间发生的下降。我们还在探地雷达剖面上观察到了与排水相关的其他几个现象：（1）一系列衍射的发展表明水饱和度的局部不规则性；（2）由于上覆部分电磁（EM）波速增加而导致地层反射的速度拉升。
We have imaged the temporal and spatial response of an unconfined aquifer during a pumping test using ground penetrating radar (GPR) profiling. In particular, we have observed the transient behavior of the reflection generated by the water content variation occurring in the transition zone between the overlying residually saturated material and the water saturated capillary fringe below. The progressive arrival time delay of this reflection was measured and used to infer its drawdown that occurred during the pumping test. We also observed several other phenomena on the GPR profiles that are related to drainage: (1) the development of a series of diffractions indicating localized irregularities in water saturation and (2) the velocity pull‐up of stratigraphic reflections due to increased electromagnetic (EM) wave velocity in the overlying section.