Journal of Hydroinformatics Vol 10 No 3 pp 245–255 © IWA Publishing 2008 doi:10.2166/hydro.2008.056
Numerical modelling of heavy metals for riverine systems using a new approach to the source term in the ADE
A. Roshanfekr, S. M. Kashefipour and N. Jafarzadeh
Faculty of Water Sciences Engineering, Shahid Chamran University, Ahwaz, Iran Tel.: +98 611 336 4055 Fax: +98 611 336 5670 E-mail: kashefipour@excite.com
Faculty of Health, Jondi Shapour Medical Sciences University, Ahwaz, Iran
ABSTRACT
This paper describes a modelling study of dissolved heavy metals in riverine systems, undertaken to introduce a new approach of the varied reaction coefficients used in the Advection–Dispersion Equation (ADE). The dissolved heavy metals, i.e. lead and cadmium, were modelled using a 1D hydro-environmental model. It is found that pH and EC play an essential role in adsorption and desorption of heavy metals by the particles in solution. Therefore, in this study we have tried to find the best relationships between pH and EC with the reaction coefficient. Relatively close agreement between predicted results and field-measured dissolved lead and cadmium concentrations were obtained for different varied reaction coefficients. Finally, the best relationships for the reaction coefficients for dissolved lead and cadmium were introduced and the results were successfully compared with the corresponding measured values.
Keywords: advection–dispersion equation; dissolved heavy metals modelling; reaction coefficient; river pollution; water quality modelling
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