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| Titel |
Evaporation from Scots pine (Pinus sylvestris) following natural re-colonisation of the Cairngorm mountains, Scotland |
| VerfasserIn |
Atul H. Haria, David J. Price |
| 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 ; 4, no. 3 ; Nr. 4, no. 3, S.451-461 |
| Datensatznummer |
250001752
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| Publikation (Nr.) |
 copernicus.org/hess-4-451-2000.pdf |
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| Zusammenfassung |
Recently, changing land-use practices in the uplands of Scotland have resulted in
increased re-colonisation of wet heath moorland by natural Scots pine (Pinus
sylvestris) woodland. The simple semi-empirical water use model, HYLUC, was
used to determine the change in water balance with increasing natural pine
colonisation. The model worked well for 1996. However, values of soil moisture
deficit simulated by HYLUC diverged significantly from measurements in 1997 when
rainfall quantity and intensities were less. Measured interception by the forest
canopy (interception by the undergrowth was not measured) was very different
from HYLUC simulated values. By changing interception parameters to those
optimised against measured canopy interception, HYLUC simulated changing soil
moisture deficits better and gave more confidence in the resulting transpiration
values.
The results showed that natural pine woodland interception may be similar to plantation stands
although the physical structure of the natural and plantation forests are
different. Though having fewer storage sites for interception in the canopy, the
natural pine woodland had greater ventilation and so evaporation of intercepted
rainfall was enhanced, especially during low intensity rainfall. To understand
the hydrological changes that would result with changing land-use (an expansion
of natural forests into the wet heath land), the modelled outputs of the wet
heath and mature forest sites were compared. Evaporation, a combination of
transpiration and interception, was 41% greater for the forest site than for the
wet heath moorland. This may have significant consequences for the
rainfall-runoff relationship and consequently for the hydrological response of
the catchment as the natural woodland cover increases
Keywords: Evaporation;
interception; transpiration; water balance; Scots pine; forest |
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