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www.hydrol-earth-syst-sci-discuss.net/6/1973/2009/
doi:10.5194/hessd-6-1973-2009
© Author(s) 2009. This work is distributed
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Physical based retrieval of crop characteristics for improved water use estimates
1DIAAT, Faculty of Agraria, University of Naples "Federico II", via Università 100, 80055 Portici, Naples, Italy
2International Institute for Geo-information Sciences and Earth Observation, Dept. of Water Resources, P.O. Box 6, 7500 AA Enschede, The Netherlands
Abstract. 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. In this study, a two-source energy balance model (TSEB) was applied to the Barrax test site. The inputs of Leaf area index (LAI) and fractional vegetation cover (fCover), were estimated from CHRIS imagery by using the traditional scaled NDVI and a LUT inversion approach. The LUT was constructed using the well established SAILH+PROSPECT radiative transfer model. Simulated fluxes were compared with tower measurements and vegetation characteristics were evaluated with in situ LAI and fCover measurements of a range of crops from the SPARC campaign 2004. Results showed a better retrieval performance for the LUT approach for canopy parameters, affecting flux predictions that were related to land use.
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Citation: Richter, K. and Timmermans, W. J.: Physical based retrieval of crop characteristics for improved water use estimates, Hydrol. Earth Syst. Sci. Discuss., 6, 1973-2004, doi:10.5194/hessd-6-1973-2009, 2009. Bibtex EndNote Reference Manager XML
