Environmental geological applications of ground penetrating radar

This paper introduces the combining application of GPR and high density resistivity method, that achieved good detecting effect of engineering geophysical exploration on island frozen soil, karst cave, subgrade collapsing, landslide hazard and so on. The two differences of the dielectric constant and the resistivity are prevalent in environmental geology and engineering geology, but also has high correlation. The ambiguity can be effectively eliminated from two ways describing the underground target. GPR can describe the shallow characterization whit details and features, the high density resistivity method can describe the deep macroscopic characteristics for the underground target, so easy to form conceptual geological model and to convenient for data analysis and data interpretation. The combining is effective that have complementarity, validation and validity for each other. The detecting parameters of GPR is more important than the data processing, which determines the quality of original data, It is necessary to do a certain amount of field test for determine the detection parameters before you start work especially in a strange area.