Instrumentation, electrical resistivity

Abstract

There have been major advancements over the past few decades in the instrumentation for the electrical resistivity method. In addition to traditional 1-D surveys, the new multielectrode and multichannel systems have made it possible to efficiently carry out 2-D and 3-D imaging surveys that provide more accurate models of the subsurface geology. Computerized dynamic towed systems can map large areas on land and water rapidly. Capacitively coupled systems make it possible to survey areas with resistive surfaces where conventional galvanic systems cannot be used. Sophisticated PC controlled monitoring systems are now available to automatically detect and record transient phenomena.