Measured dewfall and potential condensation on grazed pasture in the Collie River basin, southwestern Australia
Sudmeyer, R.A., Nulsen, R.A. and Scott, W.D. (1994) Measured dewfall and potential condensation on grazed pasture in the Collie River basin, southwestern Australia. Journal of Hydrology, 154 (1-4). pp. 255-269.
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Microlysimeters were used to measure dewfall over seven nights on a grazed grass and clover pasture in the Collie River basin in southwestern Australia. The Penman-Monteith combination equation was used over the same period to estimate potential condensation. Measured dewfall ranged between 0.002 and 0.100 mm night-1; the highest recorded dewfall rate was 0.032 mm h-1. Dewfall was shown to increase with pasture height and biomass. Potential condensation was between 0.20 and 0.36 mm night-1. There was good agreement between measured and potential vapour flux trends. Low overnight wind speeds resulted in a low ratios of dewfall to distillation. The literature suggests that annual dewfall could be up to 12 mm and may occasionally contribute significantly to daily evaporation. However, these amounts are not significant when compared with the 694 mm average annual rainfall of the area. Hence dewfall is not considered to be a significant component of the water balance at this site.
|Publication Type:||Journal Article|
|Murdoch Affiliation:||School of Environmental Science|
|Copyright:||© 1994 Elsevier B.V>|
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