Research ArticleOpen accessIn the keywordsEvaluating Methods of Estimation and Modelling Spatial Distribution of Evapotranspiration in the Middle Heihe River Basin, ChinaChuanyan Zhao, Zhongren Nan, Guodong ChengAmerican Journal of Environmental Sciences, Vol. 1, Issue 4 · 31 Dec 2005 · 6,824 accessesView PDFCite