MODET - A modular model for estimating spatially distributed evapotranspiration, crop surface temperature and energy balance

Punthakey, J; Milne-Home, WA; Yunusa, IA; Theiveyanathan, T; Prathapar, S

MODET - A modular model for estimating spatially distributed evapotranspiration, crop surface temperature and energy balance

Punthakey, J Milne-Home, WA Yunusa, IA Theiveyanathan, T Prathapar, S

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Publisher:: IAH NSW Branch
Publication Type:: Conference Proceeding
Citation:: NSW IAH Symposium 2011 - Hydrogeology in NSW - the Challenge of Uncertainty, 2011, pp. 131 - 138
Issue Date:: 2011-01

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Field	Value	Language
dc.contributor.author	Punthakey, J	en_US
dc.contributor.author	Milne-Home, WA	en_US
dc.contributor.author	Yunusa, IA	en_US
dc.contributor.author	Theiveyanathan, T	en_US
dc.contributor.author	Prathapar, S	en_US
dc.contributor.editor	McLean, W	en_US
dc.contributor.editor	Milne-Home, WA	en_US
dc.date	2011-09-05	en_US
dc.date.issued	2011-01	en_US
dc.identifier.citation	NSW IAH Symposium 2011 - Hydrogeology in NSW - the Challenge of Uncertainty, 2011, pp. 131 - 138	en_US
dc.identifier.isbn	1-876073-03-9	en_US
dc.identifier.uri	http://hdl.handle.net/10453/19068
dc.description.abstract	This paper describes a conceptnal framework for estimating spatially distributed evapotranspiration using a quasi two-layered resistance-energy balance model, which combines an energy balance equation for a crop surface and a modified Penman-Monteith combination equation. The modified equation allows estimation of transpiration from measured meteorological data and prescribed crop and soil parameters. The model predicts potential and actual evapotranspiration from a composite crop-soil surface by estimating components of the energy balance. The model requires hourly or daily averages of solar radiation, air temperature, humidity, and windspeed, along with estimates of canopy emissivity, albedo, crop height, and leaf area index. The model provides an analysis of the radiation and energy balance of the evaporation site, which includes net radiation, sensible, latent and soil heat fluxes. Canopy and leaf resistance, plant water potential and surface temperatures are also predicted by the model. These parameters estimate the response of the crop to enviromnentally induced water stress and can also be used as indicators for early warning of crop health. Modelled estimates of potential and actual evapotranspiration, crop surface temperature and plant water potential are presented for pasture in the Berriquin irrigation area.	en_US
dc.publisher	IAH NSW Branch	en_US
dc.relation.ispartof	NSW IAH Symposium 2011 - Hydrogeology in NSW - the Challenge of Uncertainty	en_US
dc.relation.ispartof	NSW IAH Symposium	en_US
dc.title	MODET - A modular model for estimating spatially distributed evapotranspiration, crop surface temperature and energy balance	en_US
dc.type	Conference Proceeding
utslib.location	NSW, Australia	en_US
utslib.location.activity	Dockside, Sydney, Australia	en_US
utslib.for	0406 Physical Geography and Environmental Geoscience	en_US
dc.location.activity	Dockside, Sydney, Australia	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
utslib.copyright.status	closed_access
pubs.consider-herdc	true	en_US
pubs.finish-date	2011-09-06	en_US
pubs.place-of-publication	NSW, Australia	en_US
pubs.start-date	2011-09-05	en_US

Abstract:

This paper describes a conceptnal framework for estimating spatially distributed evapotranspiration using a quasi two-layered resistance-energy balance model, which combines an energy balance equation for a crop surface and a modified Penman-Monteith combination equation. The modified equation allows estimation of transpiration from measured meteorological data and prescribed crop and soil parameters. The model predicts potential and actual evapotranspiration from a composite crop-soil surface by estimating components of the energy balance. The model requires hourly or daily averages of solar radiation, air temperature, humidity, and windspeed, along with estimates of canopy emissivity, albedo, crop height, and leaf area index. The model provides an analysis of the radiation and energy balance of the evaporation site, which includes net radiation, sensible, latent and soil heat fluxes. Canopy and leaf resistance, plant water potential and surface temperatures are also predicted by the model. These parameters estimate the response of the crop to enviromnentally induced water stress and can also be used as indicators for early warning of crop health. Modelled estimates of potential and actual evapotranspiration, crop surface temperature and plant water potential are presented for pasture in the Berriquin irrigation area.

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http://hdl.handle.net/10453/19068