Journal article
Modelling phosphorus transport in soils and groundwater with two-consecutive reactions
Water Research, Vol.25(10), pp.1205-1216
1991
Abstract
A model is presented for one-dimensional transport of phosphorus (P) in soils and groundwater. Convective transport, hydrodynamic dispersion and time-dependent phosphorus sorption are accounted for in the model formulation. Time-dependent sorption of soil-P is considered to follow the two consecutive reaction model of Barrow and Shaw (J. Soil Sci. 30, 67-76, 1979) which has been extensively tested against experimental data and can be described by S = k.C(n)t m. The assumed sorption model allows parameters to be obtained by independent batch and column experiments. A numerical technique is used to solve the solute transport equation incorporating a correction to numerical dispersion to improve the numerical solution. An analytical solution for a simplified case is also presented to test the numerical technique. Parameter sensitivity analysis shows that influent concentration and the parameter k strongly affect the initial breakthrough time of solute, with m and n affecting the shape of the breakthrough curve. Preliminary investigations show that the applicability of the model to describe column experimental breakthrough curves is promising.
A model is presented for one-dimensional transport of phosphorus (P) in soils and groundwater. Convective transport, hydrodynamic dispersion and time-dependent phosphorus sorption are accounted for in the model formulation. Time-dependent sorption of soil-P is considered to follow the two consecutive reaction model of Barrow and Shaw (J. Soil Sci. 30, 67-76, 1979) which has been extensively tested against experimental data and can be described by S = k ยท C nt m. The assumed sorption model allows parameters to be obtained by independent batch and column experiments. A numerical technique is used to solve the solute transport equation incorporating a correction to numerical dispersion to improve the numerical solution. An analytical solution for a simplified case is also presented to test the numerical technique. Parameter sensitivity analysis shows that influent concentration and the parameter k strongly affect the initial breakthrough time of solute, with m and n affecting the shape of the breakthrough curve. Preliminary investigations show that the applicability of the model to describe column experimental breakthrough curves is promising.
Details
- Title
- Modelling phosphorus transport in soils and groundwater with two-consecutive reactions
- Authors/Creators
- S. Notodarmojo (Author/Creator) - Murdoch UniversityG.E. Ho (Author/Creator) - Murdoch UniversityW.D. Scott (Author/Creator) - Murdoch UniversityG.B. Davis (Author/Creator) - Kansas Department of Agriculture, Division of Water Resources
- Publication Details
- Water Research, Vol.25(10), pp.1205-1216
- Publisher
- Elsevier BV
- Identifiers
- 991005542702507891
- Murdoch Affiliation
- School of Biological and Environmental Sciences
- Language
- English
- Resource Type
- Journal article
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- 8 Earth Sciences
- 8.140 Water Resources
- 8.140.450 Groundwater Modeling
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- Environmental Sciences
- Water Resources
- ESI research areas
- Environment/Ecology