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时/频域激电参数在铬污染模拟场地探测中的应用

陆晓春 能昌信 朱 勇 郑晓旭 郑晓雯

陆晓春, 能昌信, 朱 勇, 郑晓旭, 郑晓雯. 时/频域激电参数在铬污染模拟场地探测中的应用[J]. 环境科学研究, 2015, 28(3): 481-486.
引用本文: 陆晓春, 能昌信, 朱 勇, 郑晓旭, 郑晓雯. 时/频域激电参数在铬污染模拟场地探测中的应用[J]. 环境科学研究, 2015, 28(3): 481-486.
LU Xiaochun, NAI Changxin, ZHU Yong, ZHENG Xiaoxu, ZHENG Xiaowen. Time-Frequency Domain Induced Polarization Parameters Applied on Chromium Pollution Simulation Survey Site[J]. Research of Environmental Sciences, 2015, 28(3): 481-486.
Citation: LU Xiaochun, NAI Changxin, ZHU Yong, ZHENG Xiaoxu, ZHENG Xiaowen. Time-Frequency Domain Induced Polarization Parameters Applied on Chromium Pollution Simulation Survey Site[J]. Research of Environmental Sciences, 2015, 28(3): 481-486.

时/频域激电参数在铬污染模拟场地探测中的应用

基金项目: 国家高技术研究发展计划(863)项目(2009AA063101-2)

Time-Frequency Domain Induced Polarization Parameters Applied on Chromium Pollution Simulation Survey Site

  • 摘要: 在低供电频率(2-4、2-2、20、22、24 Hz)范围内,利用研发的时/频域测量系统,在室外铬污染模拟场地进行时/频域激电探测,实测视电阻率、视极化率、相角,结合最小二乘反演算法,研究各参数对铬污染低阻异常区域及其对铬浓度(以w计)差的体现. 结果显示,视电阻率和视极化率随着铬浓度差的增加而迅速减小,视电阻率从背景值的80 Ω·m左右减至50 Ω·m以下,视极化率从背景值3.0%~3.8%减至0.6%~2.2%;在不同的供电频率下,相角对含水率和铬浓度差的体现有所差异. 试验数据还显示,当供电频率从2-4 Hz增至24 Hz时,实测相角数值较为平均,但是经过最小二乘反演后,相角上限从6.27°减至1.75°. 研究结果说明,单纯的时域参数(视电阻率和视极化率)很难区分含水率和铬浓度差引起的低阻异常,但供电频率在2-2~20 Hz范围内时,频域参数相角可以区分含水率和铬浓度差引起的低阻异常.

     

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  • 刊出日期:  2015-03-25

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