Wang Yu-ling, Nai Chang-xin, Wang Yan-wen, Dong Lu
School of Computer Science and Technology, Shandong Institute of Business and Technology, Yantai 264005, China.
Huan Jing Ke Xue. 2013 May;34(5):1908-14.
In order to analyze the effects of electrical resistivity in heavy metal contaminated sites, we established the resistivity model of typical contaminated sites and simulate the DC resistivity method with Wenner arrays using the finite element method. The simulation results showed that the electrical method was influenced by the contamination concentration and the location of pollution. The more serious the degree of pollution was, the more obvious the low resistivity anomaly, thus the easier the identification of the contaminated area; otherwise, if there was light pollution, Wenner array could not get obvious low resistivity anomalies, so it would be hard to judge the contaminated area. Our simulation results also showed that the closer the contaminated areas were to the surface, the more easily the pollution was detected and the low resistivity anomalies shown in the apparent resistivity diagram were influenced by the Layered medium. The actual field survey results using resistivity method also show that the resistivity method can correctly detect the area with serious pollution.
为了分析重金属污染场地中电阻率的影响，我们建立了典型污染场地的电阻率模型，并使用有限元法对温纳排列的直流电阻率法进行模拟。模拟结果表明，电法受污染浓度和污染位置的影响。污染程度越严重，低电阻率异常越明显，因此污染区域越容易识别；否则，如果污染较轻，温纳排列无法得到明显的低电阻率异常，因此很难判断污染区域。我们的模拟结果还表明，污染区域离地表越近，越容易检测到污染，视电阻率图中显示的低电阻率异常受层状介质的影响。使用电阻率法的实际野外调查结果也表明，电阻率法能够正确检测出污染严重的区域。
