Modelling sub-daily latent heat fluxes from a small reservoir

McGloin, Ryan, McGowan, Hamish, McJannet, David and Burn, Stewart (2014) Modelling sub-daily latent heat fluxes from a small reservoir. Journal of Hydrology, 519 Part B: 2301-2311. doi:10.1016/j.jhydrol.2014.10.032

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Author McGloin, Ryan
McGowan, Hamish
McJannet, David
Burn, Stewart
Title Modelling sub-daily latent heat fluxes from a small reservoir
Journal name Journal of Hydrology   Check publisher's open access policy
ISSN 0022-1694
Publication date 2014-11-27
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.jhydrol.2014.10.032
Open Access Status
Volume 519
Issue Part B
Start page 2301
End page 2311
Total pages 11
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Subject 2312 Water Science and Technology
Abstract Accurate methods of latent heat flux quantification are essential for water management and for use in hydrological and meteorological models. Currently the effect of small lakes in most numerical weather prediction modelling systems is either entirely ignored or crudely parameterized. In order to test methods for modelling hourly latent heat flux from small water bodies, this study compares results from several modelling approaches to values measured by the eddy covariance method at an agricultural reservoir in southeast Queensland, Australia. Mass transfer estimates of LE calculated using the theoretical mass transfer model and using the Tanny et al. (2008) and Sacks et al. (1994) bulk transfer coefficients showed the best relationship with measured values under a range of meteorological conditions. The theoretical model showed the strongest correlation with measured values, while the Tanny et al. (2008) and Sacks et al. (1994) models had regression equation slopes with the closest proximity to 1. Latent heat fluxes estimated using the Granger and Hedstrom (2011) evaporation model, that was specifically developed for use at small reservoirs, showed a poor relationship with measured values, particularly in stable atmospheric conditions. The 1-dimensional hydrodynamics model, DYRESM, was used to obtain predictions of hourly latent heat flux without the use of water surface temperature measurements. DYRESM estimates of latent heat flux showed a slightly worse relationship with measured values than those predicted using the traditional mass transfer models (which used measurements of water surface temperature). However, DYRESM performed considerably better than the Granger and Hedstrom (2011) model.
Keyword Bulk transfer coefficients
Latent heat flux
Mass transfer
Water surface temperature
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Geography, Planning and Environmental Management Publications
Official 2015 Collection
 
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