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| Titel |
RESEARCH NOTEA comparison between reference transpiration and measurements of evaporation for a riparian grassland site |
| VerfasserIn |
J. W. Finch, R. J. Harding |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 2, no. 1 ; Nr. 2, no. 1, S.129-136 |
| Datensatznummer |
250000400
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| Publikation (Nr.) |
 copernicus.org/hess-2-129-1998.pdf |
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| Zusammenfassung |
| This paper compares direct measurements of evaporation with
the values predicted for reference transpiration. The measurements of actual evaporation
were made using an eddy correlation device on a grass field adjacent to the river Thames.
Measurements of soil moisture and the driving meteorological variables were also made. The
results showed that, during a period with minimal rainfall but no water stress, the
cumulative values of reference transpiration compared very well with the cumulative
measured evaporation and changes in soil moisture content. However, the values on specific
days did not compare well. Following significant rainfall, the measured evaporation
increased for a few days, probably due to evaporation of free water from the canopy or
soil. Reference transpiration fell consistently below the measured evaporation once the
soil moisture deficits exceeded 140 to 150 mm. |
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