A study on induced polarization characteristics of sand and clay for alluvium investigation
충적층 조사를 위한 모래와 점토의 유도분극 특성 고찰
- Choi, Sang-Hyuk (Department of Earth and Environmental Sciences, Chungbuk National University) ;
- Kim, Hyoung-Soo (Korea Institute of Water and Environment, Kwater) ;
- Kim, Ji-Soo (Department of Earth and Environmental Sciences, Chungbuk National University)
- Published : 2008.10.09
Silt or clay alluvium fully saturated with water generally shows low resistivity. Sometimes it is believe that the low resistivity layer is considered as good aquifer but this makes problems in the development of groundwater. To overcome this problem, we adopted induced-polarization(IP) method with resistivity method. Laboratory experiments and resistivity/IP field surveys with non-polarization electrodes were conducted for the study. Laboratory experiments shows that the increase of clay contents in the sample mixed with sand and clay give low resistivity and high chargeability. We used this experiment results in the interpretation of resistivity/IP field data which were obtained in riverbank filtration. Finally, the layer which has low resistivity and chargeabilty would be regarded as a good aquifer for the development of groundwater intake.