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Hydraulic conductivity is an important parameter, representing permeable property of the groundwater in aquifers, in theissues of groundwater development, groundwater contamination, and groundwater flow, etc. We estimated a relationshipbetween hydraulic conductivity and electrical properties (formation factor, chargeability, and time constant) of silty sand inthe laboratory. For this study, we conducted grain size analysis, constant head permeameter test, and measured electricalresistivity and spectral induced polarization of silty sand samples collected from the riverside alluvium of the NakdongRiver in Nogok-ri area, Dasan-myeon, Goryeong-gun in Gyeongbook Province, Korea. In the laboratory test, we used soilsamples of approximately uniform porosity with 0.5% error range, and kept the electrical resistivity of pore water with 100ohm-m. As a result, the relationship between effective particle size and hydraulic conductivity agrees fairly well with theexisting empirical formulas. Hydraulic conductivity was correlated with formation factor, chargeability, and time constant:hydraulic conductivity increased with increasing formation factor and time constant as well as with decreasing chargeability.Key words : Hydraulic conductivity, Formation factor, Spectral induced polarization (SIP), Chargeability, Time constant

A Relationship between Hydraulic Conductivity and Electrical Properties of Silty Sand on the Riverside of the Nakdong River