7 A 20 cm long soil column with a cross sectional area of

Last updated: 6/21/2023

7 A 20 cm long soil column with a cross sectional area of 100 cm is used for a solute transpo study Prior to adding two solutes steady state unsaturated water flow at h 20 cm was established by adjusting the hanging water tables on the ends of the column see diagram below The solutes CI with Kp 0 and picloram with Kp 0 35 cm g are added as a narrow pulse an their breakthrough at the lower soil boundary is monitored Your objective here is to predict th average breakthrough time of each chemical through the soil portion of the system The following data may aid you in your calculations Mass of oven dry soil in column 2900 g Mass of soil at steady state water content 3600 g Hydraulic conductivity function K h Ks exp ah Ks 100 cm d 0 10 cm loam h 20 cm 20 cm h 20 cm