Monitoring of Groundwater Behavior with the Rainfall on a Rock Slope by Combination Geophysical Prospecting
Makoto NAKAMURA and Harushige KUSUMI
Abstract:Generally, the groundwater flow in rock slope depends on the direction for the development of rock joints sets, those are very complicated. It is a very important problem on civil and disaster prevention engineering to grasp the groundwater behavior included to the flow conditions in rock slope. In particular, the groundwater flow in a rock slope which has random joint sets is very complicated, and the specific methods which to monitor this flow donft have been developed. The electric resistivity methods have been mainly used to make a survey of the aquifer. However, the investigations in associate with the continuous monitoring of the groundwater flow in rock slope are very few. In this paper, the continuous change of electric resistivity are measured in order to monitor the movement of groundwater flow in rock slope site by dipole-dipole electric resistivity technique on the period of rainfall, and the proposed analysis of groundwater flow in this slope based on the measured resistivity data are tried out. As the results, it is shown the possibility that proposed technique is very useful for the monitoring of groundwater flow in rock slope, and the groundwater conditions through the fracture zone and the rock joints in this site are monitored by this technique. Key Words:Slope, Rainfall, Groundwater, Geophysical prospecting, Conversion analysis