Energy balance simulation of a wheat canopy using the RZ-SHAW (RZWQM-SHAW) model

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dc.contributor.author Yu, Qiang en_US
dc.contributor.author Flerchinger, G en_US
dc.contributor.author Xu, S en_US
dc.contributor.author Kozak, J en_US
dc.contributor.author Ma, L en_US
dc.contributor.author Ahuja, L en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-05-28T09:46:00Z
dc.date.available 2010-05-28T09:46:00Z
dc.date.issued 2007 en_US
dc.identifier 2008006890 en_US
dc.identifier.citation Yu Qiang et al. 2007, 'Energy balance simulation of a wheat canopy using the RZ-SHAW (RZWQW-SHAW) model', American Society of Agricultural and Biological Engineers, vol. 50, no. 5, pp. 1507-1516. en_US
dc.identifier.issn 0001-2351 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/8870
dc.description.abstract en_US
dc.description.abstract RZ-SHAW is a new hybrid model coupling the Root Zone Water Quality Model (RZWQM) and the Simultaneous Heat and Water (SHAM model to extend RZWQM applications to conditions of frozen soil and crop residue cover RZ-SHAW offers the comprehensive land management options of RZWQM with the additional capability to simulate diurnal changes in energy balance needed for simulating the near-surface microclimate and leaf temperature. The objective of this study was to evaluate RZ-SHAW for simulations of radiation balance and sensible and latent heat fluxes overplant canopies. Canopy energy balance data were collected at various growing stages of winter wheat in the North China Plain (36 degrees 57'N, 116 degrees 6'E, 28 m above sea level). RZ-SHAW and SHAW simulations using hourly meteorological data were compared with measured net radiation, latent heat flux, sensible heat flux and soil heat flux. RZ-SHAW provided similar goodness-of-prediction statistics as the original SHAW model for all the energy balance components when using observed plant growth input data. The root mean square error (RMSE) for simulated net radiation, latent heat, sensible heat, and soil heat fluxes was 29.7, 30.7, 29.9, and 25.9 W m(-2) for SHAW and 30.6, 32.9, 34.2, and 30.6 W m-2 for RZ-SHAW, respectively. Nash-Sutcliffe R-2 ranged from 0.67 for sensible heat flux to 0.98 for net radiation. Subsequently, an analysis was performed using the plant growth component of RZ-SHAW instead of inputting LAI and plant height. The model simulation results agreed with measured plant height, yield, and LAI very well. As a result, RMSE for the energy balance components were very similar to the original RZ-SHAW simulation, and latent, sensible, and soil heat fluxes were actually simulated slightly better RMSE for simulated net radiation, latent heat, sensible heat, and soil heat fluxes was 31.5, 30.4, 30.2, and 2 7.6 W m(-2). respectively. en_US
dc.language en_US
dc.publisher American Society of Agricultural and Biological Engineers en_US
dc.relation.isbasedon en_US
dc.title Energy balance simulation of a wheat canopy using the RZ-SHAW (RZWQM-SHAW) model en_US
dc.parent American Society of Agricultural and Biological Eng... en_US
dc.journal.volume 50 en_US
dc.journal.number 5 en_US
dc.publocation United States en_US
dc.identifier.startpage 1507 en_US
dc.identifier.endpage 1516 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 070100 en_US
dc.personcode 107001 en_US
dc.personcode 0000051703 en_US
dc.personcode 0000052138 en_US
dc.personcode 0000052139 en_US
dc.personcode 0000052123 en_US
dc.personcode 0000051713 en_US
dc.percentage 100 en_US
dc.classification.name Agriculture, Land and Farm Management en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords en_US
dc.description.keywords crop growth model; RZWQM; SHAW; surface energy fluxes en_US
dc.staffid en_US


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