1 January 2011 Simple method to determine the Priestley-Taylor parameter for evapotranspiration estimation using Albedo-VI triangular space from MODIS data
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Abstract
In this contribution, we present a simple method based on Albedo-VI (vegetation index) triangular space to determine the Priestley-Taylor parameter for estimating evaporative fraction (EF) and evapotranspiration (ET) in arid and semi-arid regions. We apply this method to MODIS and observation data acquired during the Heihe river basin field experiment from July 1 to September 30, 2008. Results show that the decreasing trend of the estimated EF from MODIS data is consistent with that of precipitation during the period of day 183 to 274, 2008. The bias of estimated daily ET deviating from the corresponding ground-measured ET is −8.66 W/m2 and the root-mean-square error is 21.55 W/m2, indicating the Albedo-VI triangular method has a potential in ET estimation as a simple satellite-based method independent of surface ancillary data.
© (2011) Society of Photo-Optical Instrumentation Engineers (SPIE)
Yunjun Yao, Yunjun Yao, Qiming Qin, Qiming Qin, Abduwasit Ghulam, Abduwasit Ghulam, Shaomin Liu, Shaomin Liu, Shaohua Zhao, Shaohua Zhao, Ziwei Xu, Ziwei Xu, Heng Dong, Heng Dong, } "Simple method to determine the Priestley-Taylor parameter for evapotranspiration estimation using Albedo-VI triangular space from MODIS data," Journal of Applied Remote Sensing 5(1), 053505 (1 January 2011). https://doi.org/10.1117/1.3557817 . Submission:
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