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| Titel |
The influence of riparian woodland on the spatial and temporal variability of stream water temperatures in an upland salmon stream |
| VerfasserIn |
I. A. Malcolm, D. M. Hannah, M. J. Donaghy, C. Soulsby, A. F. Youngson |
| 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 ; 8, no. 3 ; Nr. 8, no. 3, S.449-459 |
| Datensatznummer |
250005615
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| Publikation (Nr.) |
 copernicus.org/hess-8-449-2004.pdf |
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| Zusammenfassung |
| The spatio-temporal variability of stream water temperatures was investigated at
six locations on the Girnock Burn (30km2 catchment), Cairngorms, Scotland over
three hydrological years between 1998 and 2002. The key site-specific factors affecting the
hydrology and climatology of the sampling points were investigated as a basis for physical
process inference. Particular emphasis was placed on assessing the effects of riparian
forest in the lower catchment versus the heather moorland riparian zones that are spatially
dominant in the upper catchment. The findings were related to river heat budget studies that
provided process detail. Gross changes in stream temperature were affected by the annual
cycle of incoming solar radiation and seasonal changes in hydrological and climatological
conditions. Inter-annual variation in these controlling variables resulted in inter-annual
variability in thermal regime. However, more subtle inter-site differences reflected the
impact of site-specific characteristics on various components of the river energy budget.
Inter-site variability was most apparent at shorter time scales, during the summer months
and for higher stream temperatures. Riparian woodland in the lower catchment had a
substantial impact on thermal regime, reducing diel variability (over a period of 24 hours)
and temperature extremes. Observed inter-site differences are likely to have a substantial
effect on freshwater ecology in general and salmonid fish in particular.
Keywords: temperature, thermal regime, forest, salmon, hydrology, Girnock Burn,
Cairngorm |
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