LINEAR ROOT WATER UPTAKE BY VEGETATION
DOI:
https://doi.org/10.11113/mjce.v21.15785Keywords:
Simulation, Suction, Tree Root, Unsaturated.Abstract
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.References
Afshar, A., and Marino, M. A., "Model for simulating soil water content considering evaporation." Hydro, 37, 309-322, 1978.
Bouma, J., Jongmans, A. G., Stein, A., and G. Peek, "Characterising Spatially Variable Hydraulic Properteis of a Boulder Clay Deposit in the Netherlands." Geoderma, 45, p19-29,
Braud, I., Varado, N., and Olioso, A., "Comparison of root water uptake modules using either the surface energy balance or potential transpiration." Journal of Hydrology, 301, 267 – 286,
BRE, "Low-rise building foundations: the influence of trees in clay soils." A Building Research Establishment Publication, 1999.
Dardanelli, J. L., Ritchie, J. T., Calmon, M., Andriani, J. M., and Collino, D. J., "An empirical model for root water uptake." Field Crops Research, 87, 59 – 71, 2004.
Dehn, M., Burger, G., Buma, J. and Gasparetto, P., “Impact of Climate Change on Slope Stability using expanded downscaling.†Eng. Geology 55, p193-204, 2000.
Feddes, R.A. "Water, Heat and Crop Growth. " Agric. Univ. Wageningen, 71– 12, 184, 1971.
Feddes, R. A., Kowalik, P. J., Malink, K. K., and Zaradny, H., "Simulation of field water uptake by plants using a soil water dependent root extraction function." J. Hydro, 31, 13 – 26, 1976.
Feddes, R. A., Kowalik, P. J., and Zaradny, H., "Simulation of field water use and crop yield." Wageningen Center for Agriculture and Documentation, Wageningen, 189, 1978.
Gardner, W. R., "Relation of root distribution to water uptake and availability." Agronomy J., 56, 41 – 45, 1964.
Gardner, W. R., "Modelling water uptake by roots." Irrig. Sci., 12, 109 -114, 1991.
Genuchten, M. T. V. "A closed form equation for predicting the hydraulic conductivity of unsaturated soils." Soil Sci. Am. J., 44, 892 – 898, 1980.
Greenwood, J. R., Norris, J. E., and Wint, J., "Assessing the contribution of vegetation to slope stability." Geotechnical Engineering, 157(GE4), 199 -207, 2004.
Gottardi, G., and Venutelli, M., "Moving finite element model for one-dimensional infiltration in unsaturated soil." Water Resour. Res., 28, 3259 – 3267, 1992.
Homaee, M., Dirksen, C., and Feddes, R. A., "Simulation of root water uptake 1. Non uniform transient salinity using different macroscopic reduction functions." Agricultural Water
Management, 57, 89 – 109, 2002.
Hoogland, J. C., Feddes, R. A., and Belmans, C., "Root water uptake model depending on soil water pressure head and maximum extraction rate." Acta Hort, 119, 276 -280, 1981.
Lai, C. T., and Katul, G., "The dynamic role of root water uptake in coupling potential to actual transpiration." Advances in Water Resources, 23, 427 – 439, 2000.
Landsberg, J. J., and Fowkes, N. D., "Water movement through plant roots." Ann. Bot., 42, 493 – 508, 1978.
Li, K. Y., Jong, R. D., and Boisvert, J. B., "An exponential root water uptake model with water
stress compensation." Journal of Hydrology, 252, 189 204, 2001.
Li, K. Y., Jong, R. D., Coe, M. T., and Ramankutty, N., "Root-water-uptake based upon a new water stress reduction and asymptotic root distribution function." Earth Interactions, 10,
Mathur, S., and Rao, S., "Modelling water uptake by plant roots." Journal of Irrigation and Drainage Engineering, 125(3), 159 – 165, 1999.
Mualem, Y. (1976). "A new model for predicting the hydraulic conductivity of unsaturated porous media." Water Resour. Res., 12, 513 - 522
Molz, F. J., "Models of water transport in the soil-plant system: a review." Water Resour. Res., 17(5), 1245 – 1260, 1981.
Philip, J. R., "The physical principles of water movement during the irrigation cycle." Proc. Int. congress on Irrig. Drain, 8, 124-154, 1957.
Prasad, R., "A linear root water uptake model." J. Hydrology, 99, 297 – 306, 1988.
Raats, P. A. C., "Steady flows of water and salt in uniform soil profiles with plant roots." Soil Sci. Am. Proc., 38, 717-722, 1974.
Rees, S. W., and Ali, N., "Seasonal water uptake near trees: a numerical and experiment study." Geomechanics and Geoengineering., 1(2), 129 – 138, 2006.
Richards, L. A., "Capillary conduction of liquids in porous media." Physics, 1, 318 – 333, 1931.
Ridley, A., McGinnity, B., and Vaughan, P., "Role of pore water pressure in embankment
stability". Geotechnical Engineering, 157, Issue GE4, p193-198, Paper 13714, 2004.
Roose, T., and Fowler, A. C., "A model for water uptake by plant roots." Journal of Theoretical Biology, 228, 155 171, 2004.
Rowse, H. R., Stone, D. A., and Gerwitz, A. "Simulation of the water distribution in soil." Plant Sci., 49, 534–550, 1978.
Salt, D. E., Blaylock, M., Kumar, N. P.B.A., Dushenkov, V. Ensley, B. D., Chet, I and Raskin, I., “Phytoremediation: A Novel Strategy for the Removal of Toxic Metals from the
Environment Using Plants.†Bio/Technology 13, 468 – 474, 1995.
Turner, S., "Climate change blamed as landslip incidents treble." New Civil Engineer, 10 May, 2001, p8, 2001.
Warrick, A. W., Lomen, D. O., and Fard, A. A., "Linearized moisture flow with root extraction or three dimensional, steady conditions." Soil Sci. Am. J., 44, 911-914, 1980.
Zienkiewicz, O. C., and Taylor, R. L., "The Finite Element Method." Pub. McGraw-Hill Book Company, London UK, 1989.
