Application of a two-layer canopy model of water and energy fluxes in pasture

Murugesu Sivapalan, J. D. Kalma

Research output: Contribution to journalArticlepeer-review


Considerable difficulties have been reported in the use of single-layer canopy models for estimating evapotranspiration under partial and non-uniform vegetation cover. Two-layer models that distinguish between bare soil and vegetation are considered to provide a better characterization of the energy and mass transfers over such heterogeneous surfaces. This paper presents the application of one such two-layer model to a grassland catchment in NSW. The investigation has shown that, while the two-layer model is inherently superior to the single-layer models, considerable scatter is generated in practice because of uncertainty in the additional parameter inputs that the two-layer model requires. The parameters that were found to be most critical in this study were surface soil moisture, soil heat flux and stomatal resistance.

Original languageEnglish (US)
Pages (from-to)687-693
Number of pages7
JournalNational Conference Publication - Institution of Engineers, Australia
Issue number91 pt 22
StatePublished - 1991
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)


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