视电阻率法的地形改正

文本提出用理论计算来消除复杂地形对视电阻率影响的方法。借助数学公式解析单元地形的线源畸变电场和点源畸变电场,计算并编制出量板,再将单元地形的视电阻率畸变曲线组合迭加,就能近似地取得复杂地形的改正曲线。文中举出实例,阐明了这种地形改正方法的应用和效果。

TOPOGRAPHIC CORRECTION FOR THE DC APPARENT RESISTIVITY METHOD OF ELECTRICAL PROSPECTING

A method of topographic correction by means of theoretical computations to reduce the effect of complicated topographic relief for the DC apparent resistivity method of electrical prospecting is suggested in this paper. The distorted electrical field of a line source and that of a point source of topographic elements have been studied by means of mathematical analysis.Nomographs of such distorted fields were thus computed and constructed. One-can get approximately the curves of topographic correction for any complicated topographic relief by superimposing the curves of distorted apparent resistivity of topographic elements. And finally,examples are given to indicate the applicability of this method of topographic correction for apparent resistivity measurements.