A saline solution with a concentration of 1823 mg/L is introduced into a 3-m-Iong sand column in which the pores are initially filled with distilled water. If the solution drains through the column at an average linear velocity of 1.43 m/day and the dynamic dispersivity (L) of the sand column is 15 cm . (Use Dm value from example in text). Plot the effluent (end of column) concentration versus time from t = 0 to 3 days.