Linear root water uptake by vegetation
The performance of a simple model with a linear root water extraction term that varies with time is presented in this paper. The research is based on the use of a one-dimensional form of Richard’s Equation for unsaturated moisture flow including a sink term. A numerical solution has been achieved vi...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Faculty of Civil Engineering, Universiti Teknologi Malaysia
2009
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| Online Access: | http://eprints.utm.my/id/eprint/21042/1/NazriAli2009_LinearRootWaterUptakebyVegetation.pdf http://eprints.utm.my/id/eprint/21042/ |
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| Summary: | The performance of a simple model with a linear root water extraction term that varies with time is presented in this paper. The research is based on the use of a one-dimensional form of Richard’s Equation for unsaturated moisture flow including a sink term. A numerical solution has been achieved via the finite element method for spatial discretisation along with a finite difference time-marching scheme. The model is assessed via a series of simulations of water uptake beneath uniform crop cover. A good correlation between the field data and simulated results has been achieved. This relatively straight forward approach is seemed more suitable for development and application to a range of geoengineering problems such as slope stability, shrinkage and heave prediction. |
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