基于自然电位方法的非饱和带水分分布和运移情况探测  

Detecting the information of water distribution and transport in unsaturated zone by self-potential method

作　　者：杨磊[1] 周启友[1] 雷鸣[1] 杨建龙[1] 

机构地区：[1]南京大学地球科学与工程学院水科学系,南京市210093

出　　处：《工程勘察》2012年第12期84-89,共6页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(40771038)

摘　　要：通过在中山植物园陆域水文观测站研究区埋设电极,监测野外研究区的电阻率变化和自然电位分布,可以获取非饱和带的水分分布和运移信息。结果表明:研究区的低电阻率区域也是自然电位异常区域,即含水量异常引起自然电位异常;视电阻率差值图显示的电阻率变化区域(即含水量变化的区域)与自然电位正异常区域吻合,水分的运移引起自然电位的异常。通过监测自然电位,可以同时获取了水分分布和水分运移情况。另外,本文借助自然电位概率成像方法,获取异常体的深度信息。After installing the electrodes in landside hydrometric station in Zhongshan Botanical Garden, the information of water distribution and transport could be obtained in unsaturated zone by monitoring the resistivity and self-potential in field site. The results show that the area with low resistivity is the self- potential anomaly area at the same time. That is to say, the anomaly of water content induces the anomaly of self-potential. The area whose resistivity is changing coincided with the area where self-potential shows anomaly, which means that water transport causes the self-potential anomalies. Based on the self-potential signals, the information of both water distribution and transport could be gained. In addition, the self- potential probability tomography method is applied to get the information of the depth of anomalies.

关 键 词：自然电位 电阻率 概率成像方法 

分 类 号：P631.3[天文地球—地质矿产勘探]