基于自然电位方法的土壤水分入渗过程监测

Monitoring the water infiltration progress in soil using the self-potential method

自然电位方法可以应用于水文地球物理领域获取土壤水分入渗特征。通过连续监测野外试验场的自然电位场,获取连续的自然电位平面图,直接获知了土壤水分在平面上的主要入渗区域,同时借助自然电位成像方法,揭示了土壤水分的两个主要通道,并探测出两个地下孔洞的位置,最终在地质雷达剖面图的辅助下证实了上述结论,为水文地球物理领域提供了新的技术手段和方法。

Self-potential method can be used to observe the water infiltration process in soil in hydrogeophysics. In the present study, continuous electrical potential field is measured and the surface self- potential maps are gained. Using these maps, surface infiltration region is shown immediately. With the help of self-potential tomography technique, two main preferred paths are discovered in soil and the positions of two sinkholes are determined at the same time. The ground-penetrating radar （GPR） profile maps also offer proof to confirm the above results. The self-potential method provides a new technological means in hydrogeophysics.