Estimation of the shortest time required for water and tracers to reach the B horizon in the middle of the buffer strip from the closest application plots (Plots A and B) assuming constant saturated conditions and movement exclusively in the matrix by hydrodynamic dispersion.

R: Retardation factor = 1+(ρD Kd/ θ Kv); at saturation WCv = P; Time = (LR)/v, v = q/ θ v), L = 15 m (distance from the creek); q = -Ks dH/dz, dH/dz: Hydraulic gradient = 1 under saturated conditions.
Molecular diffusion is assumed negligible compared to the hydrodynamic dispersion.
The B parameters are averages for the B1 and B2 horizons
Estimation of the shortest time required for water and tracers to reach the B horizon in the middle of the buffer strip from the closest application plots (Plots A and B) assuming constant saturated conditions and movement exclusively in the matrix by hydrodynamic dispersion.