Conference Proceedings

Riparian tree water use by eucalyptus coolabah in the Lake Eyre Basin

EGI Payne, JF Costelloe, IE Woodrow, EC Irvine, AW Western, AL Herczeg

30th Hydrology and Water Resources Symposium | Conference Organising Committee | Published : 2006

Abstract

The Lake Eyre Basin (LEB) is characterised by enormous stream flow variability, low rainfall, saline groundwater and at times saline surface water; conditions that demand flexible tree water use strategies in the riparian zone. In the lower reaches of the Diamantina River, the water sources and extraction patterns of Eucalyptus coolabah were examined using isotope data from xylem, soil water, groundwater and surface water. Additionally, soil chloride and matric potential data were used to infer zones of water availability for root uptake. It was found that despite their elevated salinity, groundwater and soil water formed a large proportion of the transpiration flux, with little contribution..

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