Journal article
Obtaining soil hydraulic properties for water balance and leaching models from survey data. 1. Water retention
Australian Journal of Agricultural Research, Vol.50(2), pp.283-289
1999
Abstract
A physico-empirical 2-parameter power law model of the draining water retention curve (WRC) based solely on clay content is described and further developed using 6 datasets obtained from Australian and New Zealand soils. The slope of the WRC, or pore-size distribution index, is well described by the model but the bubbling pressure, or inflection point is poorly described. Without a good estimation of the bubbling pressure it is not possible to scale the physico-empirical model to the WRC. To achieve the scaling, a single measured point on the WRC in the unsaturated range is required. The resulting estimated water contents may be satisfactory for application within broad-scale leaching risk models and for generalised extrapolation of results from detailed experimental sites but caution is still required for quantitative applications of nitrate leaching models at a particular site.
It is concluded that soil surveys could usefully include a single WRC measurement in the field at each sampling location to improve their utility for water and chemical transport modelling.
Details
- Title
- Obtaining soil hydraulic properties for water balance and leaching models from survey data. 1. Water retention
- Authors/Creators
- K.R.J. Smettem (Author/Creator)Y.M. Oliver (Author/Creator) - Graduate Research SchoolL.K. Heng (Author/Creator)K.L. Bristow (Author/Creator)E.J. Ford (Author/Creator)
- Publication Details
- Australian Journal of Agricultural Research, Vol.50(2), pp.283-289
- Publisher
- CSIRO
- Identifiers
- 991005542887607891
- Copyright
- © CSIRO 1999
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
These are selected metrics from InCites Benchmarking & Analytics tool, related to this output
- Collaboration types
- Domestic collaboration
- Citation topics
- 7 Engineering & Materials Science
- 7.133 Geotechnical Engineering
- 7.133.986 Unsaturated Soil Mechanics
- Web Of Science research areas
- Agriculture, Multidisciplinary
- ESI research areas
- Agricultural Sciences