不同土壤中含油污水污染区的电性变化研究及污染区探测

The study of electrical resistivity change of different saturation soils contaminated with oil sewage and the contaminated area detecting

本文利用室内电阻率测试的方法研究了研究了饱和土和不饱和土两类土中含油污水的侵入量对其导电性的影响.测试结果表明,对于不饱和土,含油污水的侵入会改变土的饱和度从而引起其电阻率的降低,侵入量越大其电阻率越低;而饱和土的电阻率随含油污水侵入量的增大而增大直到趋于稳定.基于此,通过室内模拟土层污染和野外实地观测污染土层的方式研究了含油污水污染不同饱和度土层的电剖面异常特征,在不饱和土层中污染区域表现为相对低阻异常区而在饱和土层中表现为相对高阻异常区.通过对比不同时期的监测结果显示异常区的范围随污染区的变化而变化,并可反映出污染区的实际分布.文章分析了利用电阻率法进行含油污水污染地下介质调查的几个模糊点,对提高探测效果具有指导意义.

We test the electrical resistivity change of saturation soils and unsaturation soils contaminated with oil sewage with electrical method in lab. The test results reveal that when the unsaturation soils are contaminated with oil sewage , their saturation will increase and their resistivity will decrease ,the more as the oil sewage leak into soils the lower the electrical resistivity of soils will become. But to the saturation soils , the more as the oil sewage leak into soils the higher the electrical resistivity of soils will become until it become stable. On the base of those result ,we also research the electrical section character of different soils contaminated with oil sewage by detect the contaminated soils in lab and in field. The detect results show the electrical section of the unsaturation soils become lower resistivity and that of the saturation soils become higher. Furthermore we can detect the size of contaminated area on the base of the electrical abnormal area and make clear it change by contrast the detecting result of different date.