Linear root water uptake by vegetation
Ali, N., and Rees, S.W., (2009) Linear root water uptake by vegetation. Malaysian Journal of Civil Engineering, 21 (2). pp. 110-124. ISSN 18237843
Official URL: http://www.civil.utm.my
Universiti Teknologi Malaysia. Faculty of Civil Engineering
Cardiff School of Engineering, UK
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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