| 重金属污染场地电阻率法探测数值模拟及应用研究 |
| 摘要点击 1475 全文点击 1196 投稿时间：2012-08-23 修订日期：2012-09-25 |
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| 中文关键词 电阻率法 温纳装置 重金属污染场地 数值模拟 有限元法 |
| 英文关键词 electrical resistivity survey Wenner array heavy metal contaminated sites numerical simulation infinite element method |
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| 中文摘要 |
| 为了分析重金属污染场地的电阻率法探测效果,建立典型污染场地的电阻率模型,采用有限元法对电阻率法探测进行数值模拟,分析电阻率法探测的典型装置——温纳装置对于不同污染程度和污染区域的探测效果. 模拟结果表明,电法装置的探测效果受到污染程度和污染区域埋深的影响,污染程度越严重,探测得到的低阻异常越明显,污染区域越容易识别; 反之,污染程度较轻时(污染土壤与背景土壤电阻率比值大于60%),温纳装置探测无法得到明显的低阻异常,不利于污染区域判断; 污染区域越靠近地表,则越容易被检测出,污染区域埋深较深时,视电阻率断面图异常不明显,不易污染区域判断. 实际场地电阻率法探测结果也表明,电阻率法能够正确检测出污染相对严重的区域. |
| 英文摘要 |
| 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. |
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