Modelling Canopy Resistance For Estimating Latent Heat Flux At A Tea Field In South China

Journal article (2017)

Authors

H. Yan Water Resources - , Yangzhou University

C. Zhang Yangzhou University, Water Resources -

G. Peng Yangzhou University

R.O. Darko Yangzhou University

B. Cai Yangzhou University

Research Group

Water Resources () (TU Delft)

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Published Date

06-06-2017

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Water Management

Research Group

Water Resources

Abstract

Determination of canopy resistance (r_c ) is necessary for accurate estimating hourly latent heat flux (LET), using the Penman–Monteith (PM) model for tea crop. In this study, a non-linear relationship between r_c and climatic resistance (r*) was obtained for tea plants based on micro-meteorological data and LET from the end of 2014 to the beginning of 2016 in southern China. The proposed r_c model was integrated to the PM method and compared with measured LET using a Bowen ratio energy balance method. The root mean square error (RMSE) and the index of agreement (d) were calculated for assessing the accuracy of the proposed r_c model. RMSE and d values for r_c and LET were 167.4 s m⁻¹ and 29.7 W m⁻² and 0.93 and 0.99, respectively. As compared to data from a single season, the r_c sub-model based on data from different seasons was more reliable for estimating LET of tea field when integrated to the PM model.

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