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Journal of Applied Sciences
Year: 2011  |  Volume: 11  |  Issue: 5  |  Page No.: 815 - 823

Phosphorus Transport Through a Saturated Soil Column: Comparison Between Physical Modeling and HYDRUS-3D Outputs

A.A. Naseri, Y. Hoseini, H. Moazed, F. Abbasi, H.M.V. Samani and S.A. Sakebi    

Abstract: The objective of the present study was to understand Phosphorus transport from soil columns at different water flux densities and to compare computer simulation results using HYDRUS-3D and the physical model against column-experiment data. Towards that end, two water flux densities (0.0075, 0.0065 m sec-1) and P concentration rates (33 mol cm-3) were used. The soil used has a silty clay- loam texture. The numerical model (HYDRUS-3D) successfully predicted P transport in the present experiment. Overall, the HYDRUS-3D model successfully simulated the water flow in the columns; however, it overestimated the final adsorbed PO4 concentrations in the soil. The present column experiment is useful for assessing relative behavior of P in increasing the movement of phosphorus ions out of the soil profile and into ground waters.

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