高密度电阻率法与地质雷达法在土壤厚度调查中应用效果——以西昌市土壤厚度调查为例

Application of high density resistivity and geological radar in soil thickness survey:A case study of the soil thickness survey in Xichang

生态地质调查是新时代地质调查工作提出的新要求,土壤厚度调查是生态地质调查的重要内容之一。为更准确地对土壤厚度开展精细探测,本文采用高密度电阻率法与地质雷达法在西昌市开展土壤与下伏基岩界线精细测量。测量结果显示:土壤层具有高阻视电阻率异常、电磁波反射信号较弱的特征,而深部基岩则表现为相对低阻视电阻率异常、电磁波反射信号表现较强。因此,高密度电阻率与地质雷达法能有效识别岩土层界线和土壤厚度,为生态地质调查中土壤厚度调查提供重要参数。

Ecological geological survey is a new requirement of geological survey in the new era.Soil thickness survey is one of the important contents of ecological geological survey.In order to more accurately detect the thickness of soil,the high density resistivity method and geological radar method were used to carry out the fine measurement of the boundary between soil and underlying bedrock in Xichang city.The results show that the soil layer exhibits the characteristics of high apparent resistivity anomaly and weak electromagnetic wave reflection signal,while the deep bedrock shows relatively low apparent resistivity anomaly and strong electromagnetic wave reflection signal.Therefore,high density resistivity and geological radar method can effectively identify the boundary of rock layer and soil thickness.It provides important parameters for the investigation of soil thickness in ecological geological survey.