Question 2 (50 points). Air sampling network above a soil surface where heptachlor was applied indicated the concentrations given in the table below. The wind velocity profile above the soil is specified with a shear velocity of 26cms1, a roughness coefficient yo =0.1cm, and d=0. Assume a neutral atmospheric stability exists. Compute the vertical diffusion flux rate (g/m2.s) of heptachlor from y=0.15m to y=0.25 m at 1hr and 24hr after application, and the mass rate of heptachlor removal due to vertical diffusion if the soil surface area is 50m50m. Question 2 (50 points). Air sampling network above a soil surface where heptachlor was applied indicated the concentrations given in the table below. The wind velocity profile above the soil is specified with a shear velocity of 26cms1, a roughness coefficient yo =0.1cm, and d=0. Assume a neutral atmospheric stability exists. Compute the vertical diffusion flux rate (g/m2.s) of heptachlor from y=0.15m to y=0.25 m at 1hr and 24hr after application, and the mass rate of heptachlor removal due to vertical diffusion if the soil surface area is 50m50m