Wide-area estimates of evapotranspiration by red gum (Eucalyptus camaldulensis) and associated vegetation in the Murray-Darling River Basin, Australia
Results/Conclusions: Total ET had a steeper response to temperature and net radiation than red gum EG, possibly reflecting differences between grasses and trees. Red gum forest covered 38,134 ha of riparian area in the Yanga National Forest near the town of Balranald, New South Wales. Mean ET estimated by MODIS imagery and ETo was 795 mm yr-1 and precipitation was 351 mm yr-1. The difference, projected over the area of red gum forest, was 169 mcm yr-1, presumably derived from groundwater. About 17% of river inflows were consumed by red gums and associated vegetation. This study supports ground studies suggesting that red gum trees are resilient to drought conditions and that floods at five year intervals are sufficient to maintain healthy trees.