In this diagram the Deuterium excess is correlated with the electric conductivity. One easily can see that with a decreasing minimisation the D-values are decreasing, meaning that they withdraw from the value 8, the D-value of the meteoric line and thus indicating that fractionation processing during evaporation had happened. So you see an increase of the electrical contactivity and increase also of evaporation happened in this ground water, mainly ground water samples. The sample from the Nakkavagu river from the surface run off is off of this line.