Informations et ressources scientifiques
sur le développement des zones arides et semi-arides

Titre : Hydrological analysis for the integration of tree belt plantations into Australian’s agricultural systems

Auteur : Ticehurst, Jenifer Lyn

Université de soutenance : Australian National University

Grade : Doctor of Philosophy (PhD) 2004

Résumé partiel
Tree plantations have the potential to reduce waterlogging and salinity in Australia’s agricultural landscapes by transpiring greater quantities of water than annual pastures and crops. Tree belts, planted on hillslopes at the breakof-slope, have been designed to intercept water flowing laterally on top of and beneath the soil surface. The tree belt location and design are influenced by the quantity and sources of available water. The volume of lateral flow and the flow pathways, depend on the rainfall, topographic and soil characteristics of the hjllslope. This project aims to assist in identifying the relative amounts of water in lateral flow pathways on hillslopes for the purpose of locating and designing tree belt plantations. The research, in part, comprises a monitoring and analysis of the hillslope hydrology at a field site in southern New South Wales. This includes on-site measurement of the climate, soil water content, bedrock and perched watertables, and surface and subsurface lateral flow. These data are analysed in conjunction with field description of the soil stratigraphy, hydraulic and chemical properties and the topography. The field work is complimented with a sensitivity analysis using the physically-based ’HILLS’ model to extrapolate from the experimental field site to the wider region. The key findings are integrated to initiate the development of guidelines for locating and designing tree belt plantations in south-east Australia.

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