Relationship between concentration of Sodium Chloride solution and saturated Hydraulic Conductivity in Saraburi soil series

Abstract

To study a relationship between the different concentration of Sodium Chloride solution and the saturated Hydraulic Conductivity (K_sat) in the Saraburi soil series. The experimental was designed in Completely Randomized Design (CRD) of 6 treatments with 3 replications. It consisted of 6 different level of the concentration of Sodium Chloride solution i.e. 0, 15, 20, 25, 50 and 100 g/L. The experiment was undertaken at 2 layers of top soils i.e. at the depth of 0-15 cm and 15-30 cm. Undisturbed soil samples were collected by the standard soil core method. The saturated Hydraulic Conductivity under different level of the concentration of Sodium Chloride solution was measured by the falling head method. The results indicated statistically significant differences between different level of the concentration of Sodium Chloride solution and saturated Hydraulic Conductivity.  The exponential functions between the concentration of Sodium Chloride solution and the saturated Hydraulic Conductivity were presented. The equation of y = 0.0057e^0.0365x (R² = 0.8903) was found at the soil depth of 0-15 cm while y = 0.0067e^0.0133x (R² = 0.8067) was found for the 15-30 cm soil depth. The highest concentration of Sodium Chloride solution of 100 g/L also showed the highest value of saturated Hydraulic Conductivity at both soil depth