Study on the relationship between total dissolved solids (TDS) and electrical conductivity (EC) of the aquifers in Ca Mau province

This article has established a set of empirical equations to describe the relationship between bulk resistivity and TDS of the Upper-Middle Pleistocene aquifer (qp 2-3 ) and Lower Pleistocene aquifer (qp 1 ) of the for field survey in 2017 in Ca Mau province. This article has determined the content of TDS based on EC (TDS EC ) and established correlation regression equation between TDS LAB and TDS is based on the EC of the qp 2-3 aquifer: Y = 0.549 X – 0.081  with R 2 = 0.975 and Standard Error (SE) = 0.1591. The qp 1 aquifer: Y = 0.4669 X + 0.0483 with R 2 = 0.9869, Standard Error (SE) = 0.0949. Based on these regression correlation equations, we found a high correlation coefficient and small deviation between TDS LAB and TDS EC . Therefore, the determination of TDS content through the EC has reduced the cost of groundwater samples of the aquifers of laboratory analysis in Ca Mau province.