摘要
Differential sounding is applied to engineering surveying owing to unique working and preferably flexibility. Therefore, this paper firstly analyzes the relation between size of AB and prospecting depth. Secondly, it gives apparent resistivity forward result of several 2-D and 3-D complex geoelectric structures. Finally, this paper analyzes and contrasts apparent resistivity anomalous character of 2-D he 3-D geoelectric structures so as to provide a guidance to work.