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

DSpace/Manakin Repository

Search OPUS

Advanced Search


My Account

Show simple item record Yu, Q Flerchinger, GN Xu, S Kozak, J Ma, L Ahuja, LR 2010-05-28T09:46:00Z 2007-01
dc.identifier.citation American Society of Agricultural and Biological Eng..., 2007, 50 (5), pp. 1507 - 1516
dc.identifier.issn 0001-2351
dc.identifier.other C1UNSUBMIT 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.
dc.publisher American Society of Agricultural and Biological Engineers
dc.title Energy balance simulation of a wheat canopy using the RZ-SHAW (RZWQM-SHAW) model
dc.type Journal Article
dc.parent American Society of Agricultural and Biological Eng...
dc.journal.volume 5
dc.journal.volume 50
dc.journal.number 5 en_US
dc.publocation United States en_US
dc.identifier.startpage 1507 en_US
dc.identifier.endpage 1516 en_US SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0701 Agriculture, Land and Farm Management
dc.personcode 107001
dc.percentage 100 en_US Agriculture, Land and Farm Management en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US 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.description.keywords crop growth model
dc.description.keywords RZWQM
dc.description.keywords SHAW
dc.description.keywords surface energy fluxes
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - C3
utslib.copyright.status Open Access 2015-04-15 12:23:47.074767+10
utslib.collection.history General (ID: 2)
utslib.collection.history Uncategorised (ID: 363)

Files in this item

This item appears in the following Collection(s)

Show simple item record