Abstract
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 language | English (US) |
|---|---|
| Pages (from-to) | 687-693 |
| Number of pages | 7 |
| Journal | National Conference Publication - Institution of Engineers, Australia |
| Volume | 3 |
| Issue number | 91 pt 22 |
| State | Published - 1991 |
| Externally published | Yes |
| Event | International Hydrology and Water Resources Symposium 1991 Part 3 (of 3) - Perth, Aust Duration: Oct 2 1991 → Oct 4 1991 |
ASJC Scopus subject areas
- General Engineering