Some Consideration of Groundwater Quality Characteristics in Nakdong River Region - Analysis of Correlation between Electrical Conductivity(EC) and Total Dissolved Solid(TDS) -

낙동강권역 지하수 수질 특성 고찰 - 전기전도도와 총고용물 함량의 상관성 분석을 중심으로 -

Groundwater qualities in Nakdong river region were investigated during 1999 and 2000. Groundwater samples were collected twice from about 150 sites over the region. The EC and TDS obtained in first survey (October, 1999) show rather high values than those in second survey(April, 2000) and this seems to be caused by groundwater temperature. There is obvious positive correlation between EC and TDS. For the study area, the following equation can be written : TDS(mg/l) = <0.64~0.70> x EC($mutextrm{s}$/cm). As the concentration of major ions increases in natural condition, there is a tendency that the ratio of TDS and EC has consistent value. This observation suggests that TDS measurement can be replaced by EC measurement in the some ranges.