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Estimation of long-term basin scale evapotranspiration from streamflow time series

dc.contributor.author Hui, D
dc.contributor.author Jackson, Robert
dc.contributor.author Katul, Gabriel G
dc.contributor.author McCarthy, HR
dc.contributor.author Oren, R
dc.contributor.author Palmroth, S
dc.date.accessioned 2011-06-21T17:26:39Z
dc.date.issued 2010-10-29
dc.identifier.issn 0043-1397
dc.identifier.uri http://hdl.handle.net/10161/4072
dc.description.abstract We estimated long-term annual evapotranspiration (ETQ) at the watershed scale by combining continuous daily streamflow (Q) records, a simplified watershed water balance, and a nonlinear reservoir model. Our analysis used Q measured from 11 watersheds (area ranged from 12 to 1386 km 2) from the uppermost section of the Neuse River Basin in North Carolina, USA. In this area, forests and agriculture dominate the land cover and the spatial variation in climatic drivers is small. About 30% of the interannual variation in the basin-averaged ETQ was explained by the variation in precipitation (P), while ETQ showed a minor inverse correlation with pan evaporation. The sum of annual Q and ETQ was consistent with the independently measured P. Our analysis shows that records of Q can provide approximate, continuous estimates of long-term ET and, thereby, bounds for modeling regional fluxes of water and of other closely coupled elements, such as carbon. Copyright 2010 by the American Geophysical Union.
dc.language.iso en_US
dc.relation.ispartof Water Resources Research
dc.relation.isversionof 10.1029/2009WR008838
dc.title Estimation of long-term basin scale evapotranspiration from streamflow time series
dc.title.alternative
dc.type Journal article
dc.description.version Version of Record
duke.date.pubdate 2010-10-9
duke.description.issue
duke.description.volume 46
dc.relation.journal Water Resources Research
pubs.begin-page W10512
pubs.issue 10
pubs.organisational-group Civil and Environmental Engineering
pubs.organisational-group Duke
pubs.organisational-group Earth and Ocean Sciences
pubs.organisational-group Environmental Sciences and Policy
pubs.organisational-group Nicholas School of the Environment
pubs.organisational-group Pratt School of Engineering
pubs.publication-status Published
pubs.volume 46


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