Akademik Veri Yönetim Sistemi
FRESENIUS ENVIRONMENTAL BULLETIN, cilt.15, sa.5, ss.452-456, 2006 (SCI-Expanded)
In this study, a column-leaching experiment with two flow velocities was carried out to evaluate the estimation of boron transport by using two-equations. The first equation, by neglecting the pore scale dispersion in homogeneous profile, was convection equation, CE, and the second one was advection dispersion equation, ADE. The special purpose of this study was to estimate boron leaching in homogenous soil column and investigate the effects of pore scale dispersivity under steady-state water flow conditions. In this leaching experiment, high water flow velocity resulted in a greater dispersion coefficient D, especially in sandy clay loam soil, compared with that in clay loam (CL). The agreement between the determined and estimated values with CE and ADE was poor in the sandy clay loam soil. On the other hand, in CL both values were in positive agreement, especially at the first leaching. This could be explained as follows: ADE was sensitive to the estimation of easily soluble boron at first, and when easily soluble boron decreased with leaching, the model estimation began to deviate from the determined values. However, slow and faster water flow velocities did not create any difference for CL soil.