[1]WEI Feng,WANG Quan-jiu.Exponential Function Model of Soil Solute Transport[J].Research of Soil and Water Conservation,2012,19(05):230-234.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
19
Number of periods:
2012 05
Page number:
230-234
Column:
Public date:
2012-10-20
- Title:
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Exponential Function Model of Soil Solute Transport
- Author(s):
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WEI Feng, WANG Quan-jiu
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Xi’an University of Technology, Xi’an 710048, China
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- Keywords:
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convection-dispersion equation; boundary layer method; exponential function model; soil solute transport; parameter estimation
- CLC:
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S152.7+2
- DOI:
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- Abstract:
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The boundary layer theory is a simple model to describe solute transport in soil. The solute transport parameters can be estimated through the boundary layer changes over time. Modeling the solute transport in soil and estimating the transport parameters are the important goals of this research based on the boundary layer method. A soil solute transport exponential function model was developed based on assumption of exponential concentration profile. The effects of all parameters on boundary layer distance with time were analyzed. The results showed that the smaller pore-water velocity and the shorter duration should be selected to compute soil solute transport parameters. Equations describing soil solute concentration profile were compared with an exact solution. The results indicated that the errors of exponential solution were less than others at the shorter duration. The proposed model for estimating parameters and describing solute concentration distribution of solute transport in soil proves to be useful by error analysis.