Hydrology and Earth System Sciences www.hydrol-earth-syst-sci.net 1027-5606 1607-7938 13 5 2009 10.5194/hess-13-663-2009 http://www.hydrol-earth-syst-sci.net/13/663/2009/ http://www.hydrol-earth-syst-sci.net/13/663/2009/hess-13-663-2009.html http://www.hydrol-earth-syst-sci.net/13/663/2009/hess-13-663-2009.pdf 663 674 2009-05-27 Physically based retrieval of crop characteristics for improved water use estimates K. Richter katja.rich@gmail.com W. J. Timmermans Department of Agricultural Engineering, University of Naples "Federico II", via Università 100, 80055 Portici (Na), Italy International Institute for Geo-information Sciences and Earth Observation, Dept. of Water Resources, P. O. Box 6, 7500 AA Enschede, The Netherlands The increasing scarcity of water from local to global scales requires the efficient monitoring of this valuable resource, especially in the context of a sustainable management in irrigated agriculture. 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