Actual evapotranspiration estimation by ground and remote sensing methods: the Australian experience

Glenn, EP; Doody, TM; Guerschman, JP; Huete, AR; King, EA; Mcvicar, TR; Van Dijk, AIJM; Van Niel, TG; Yebra, M; Zhang, Y

Actual evapotranspiration estimation by ground and remote sensing methods: the Australian experience

Glenn, EP Doody, TM Guerschman, JP Huete, AR

King, EA Mcvicar, TR Van Dijk, AIJM Van Niel, TG Yebra, M Zhang, Y

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Publication Type:: Journal Article
Citation:: Hydrological Processes, 2011, 25 (26), pp. 4103 - 4116
Issue Date:: 2011-12-30

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Field	Value	Language
dc.contributor.author	Glenn, EP	en_US
dc.contributor.author	Doody, TM	en_US
dc.contributor.author	Guerschman, JP	en_US
dc.contributor.author	Huete, AR https://orcid.org/0000-0003-2809-2376	en_US
dc.contributor.author	King, EA	en_US
dc.contributor.author	Mcvicar, TR	en_US
dc.contributor.author	Van Dijk, AIJM	en_US
dc.contributor.author	Van Niel, TG	en_US
dc.contributor.author	Yebra, M	en_US
dc.contributor.author	Zhang, Y	en_US
dc.date.issued	2011-12-30	en_US
dc.identifier.citation	Hydrological Processes, 2011, 25 (26), pp. 4103 - 4116	en_US
dc.identifier.issn	0885-6087	en_US
dc.identifier.uri	http://hdl.handle.net/10453/18073
dc.description.abstract	On average, Australia is a dry continent with many competing uses for water. Hence, there is an urgent need to know actual evapotranspiration (ET a) patterns across wide areas of agricultural and natural ecosystems, as opposed to just point measurements of ET a. The Australian Government has tasked the science agencies with operationally developing monthly and annual estimates of ET a and other hydrological variables, and with forecasting water availability over periods of days to decades, as part of its national water assessment programme. To meet these needs, Australian researchers have become leaders in developing large-area methods for estimating ET a at regional and continental scales. Ground methods include meteorological models, eddy covariance towers, sap flow sensors and catchment water balance models. Remote sensing methods use thermal infrared, mid infrared and/or vegetation indices usually combined with meteorological data to estimate ET a. Ground and remote sensing ET a estimates are assimilated into the Australian Water Resource Assessment, which issues annual estimates of the state of the continental water balance for policy and planning purposes. The best ET a models are estimated to have an error or uncertainty of 10% to 20% in Australia. Developments in Australian ET a research over the past 20years are reviewed, and sources of error and uncertainty in current methods and models are discussed. Copyright © 2011 John Wiley & Sons, Ltd.	en_US
dc.relation.ispartof	Hydrological Processes	en_US
dc.relation.isbasedon	10.1002/hyp.8391	en_US
dc.subject.classification	Environmental Engineering	en_US
dc.title	Actual evapotranspiration estimation by ground and remote sensing methods: the Australian experience	en_US
dc.type	Journal Article
utslib.citation.volume	26	en_US
utslib.citation.volume	25	en_US
utslib.for	0703 Crop and Pasture Production	en_US
utslib.for	0907 Environmental Engineering	en_US
utslib.for	0406 Physical Geography and Environmental Geoscience	en_US
utslib.for	0905 Civil Engineering	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 Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CAMGIS - Centre for Advanced Modelling and Geospatial lnformation Systems
utslib.copyright.status	closed_access
pubs.issue	26	en_US
pubs.publication-status	Published	en_US
pubs.volume	25	en_US

Abstract:

On average, Australia is a dry continent with many competing uses for water. Hence, there is an urgent need to know actual evapotranspiration (ET a) patterns across wide areas of agricultural and natural ecosystems, as opposed to just point measurements of ET a. The Australian Government has tasked the science agencies with operationally developing monthly and annual estimates of ET a and other hydrological variables, and with forecasting water availability over periods of days to decades, as part of its national water assessment programme. To meet these needs, Australian researchers have become leaders in developing large-area methods for estimating ET a at regional and continental scales. Ground methods include meteorological models, eddy covariance towers, sap flow sensors and catchment water balance models. Remote sensing methods use thermal infrared, mid infrared and/or vegetation indices usually combined with meteorological data to estimate ET a. Ground and remote sensing ET a estimates are assimilated into the Australian Water Resource Assessment, which issues annual estimates of the state of the continental water balance for policy and planning purposes. The best ET a models are estimated to have an error or uncertainty of 10% to 20% in Australia. Developments in Australian ET a research over the past 20years are reviewed, and sources of error and uncertainty in current methods and models are discussed. Copyright © 2011 John Wiley & Sons, Ltd.

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http://hdl.handle.net/10453/18073