ANALYSIS OF INTERFERENCE OF RAINFALL ON EARTH RESISTIVITY

As some earth resistivity (ρ_s) observational stations are limited by the station site conditions and the observation depths are relatively shallow, the observed values are affected by meteorological factors such as rainfall. In this parper, by selecting the monthly average values of observed data of EW direction at Changli Station in 1983-1994 and by convolution filtering and multiple regression methods, the rainfall correction for p, has been made, it has been regarded as a grey box, the data has been extrapolated to the year of 1995, then residual analysis of original observed data is made, a certain effect has been obtained. At the same time,it has been checked by a common regression method. It is considereed that the method is feasible.