A solute transport study for salt diffusion in now spherical (irregular) aggregates of soil. | [Pakistan Journal of Agriculture, Agricultural Engineering and Veterinary Sciences • 2003]

Author(s):

1. A. A. Siyal: Department of Land and Water Management and Irrigation and Drainage, Sindh Agriculture University, Tandojam, Pakistan

2. A. G. Siyal: Department of Land and Water Management and Irrigation and Drainage, Sindh Agriculture University, Tandojam, Pakistan

3. A. W. Siyal: WRRI, National Agricultural Research Centre, Islamabad, Pakistan

4. R. Memon: WRRI, National Agricultural Research Centre, Islamabad, Pakistan

Abstract:

Diffusion and mass transfer models have been presented in the past for simulation of solute transport al soil micropore level. Mass transfer model neglects the geometry of micropore hence poor, results were obtained. However, diffusion model gives realistic results but it is used only to simulate spherical. (regular shape) aggregates. In this study an attempt has been made to check whether or riot solute diffusion from non-spherical aggregates could be represented by diffusion in equivalent spheres. An experiment of batch solute diffusion from non-spherical aggregates was conducted and the measured results were compared with the predicted results calculated from diffusion model using true nominal radius of an, equivalent sphere. The experimental study demonstrated that non-spherical aggregates (irregular shape in this study) can be represented by equivalent spherical radius (true nominal radius). Once an equivalent spherical aggregate radius is calculated it may be used in prediction of solute and contaminant transport through soils using bi-continuum approach of the solute transport.

Page(s): 44-47

DOI: DOI not available

Published: Journal: Pakistan Journal of Agriculture, Agricultural Engineering and Veterinary Sciences, Volume: 19, Issue: 2, Year: 2003

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