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我们在水饱和、天然砂含水层中有控制地释放四氯乙烯,以便评价用各种地球物理技术探测和监视地层中致密非水相流体(DNAPL)的有效性。四氯乙烯是一种典型的DNAPL,它具有相对低的介电常数(2.3),而替代的孔隙水具有相对高的介电常数(80),这样它可成为用地面穿透雷达(GPR)进行探测的可能目标之一。GPR数据采用200MHz天线采集。在不同的采集时间、相同
We controlled the release of PCE in a water-saturated, natural sand aquifer in order to evaluate the effectiveness of using various geophysical techniques to detect and monitor dense non-aqueous fluid (DNAPL) in the formation. Tetrachlorethylene is a typical DNAPL with a relatively low dielectric constant (2.3), whereas alternative pore waters have a relatively high dielectric constant (80) so that it can be used as a ground penetrating radar (GPR) One of the possible targets for exploration. GPR data using 200MHz antenna acquisition. At different acquisition times, the same