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| Titel |
Distribution of bog and heath in a Newfoundland blanket bog complex: topographic limits on the hydrological processes governing blanket bog development |
| VerfasserIn |
P. A. Graniero, J. S. 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 ; 3, no. 2 ; Nr. 3, no. 2, S.223-231 |
| Datensatznummer |
250000911
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| Publikation (Nr.) |
 copernicus.org/hess-3-223-1999.pdf |
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| Zusammenfassung |
| This research quantified the role of topography and hydrological processes
within and, hence, the development of, blanket bogs. Topographic characteristics
were derived from digital elevation models (DEMs) developed for the surface and
underlying substrate at three blanket bog sites on the southeastern lobe of the
Avalon Peninsula, Newfoundland. A multinomial logit (MNL) model of the
probability of bog occurrence was constructed in terms of relevant topographic
characteristics. The resulting model was then used to investigate the
probabilistic boundary conditions of bog occurrence within the landscape. Under
average curvatures for the sites studied, substrate slopes up to 0.065 favoured
blanket bog development. However, steeper slopes could, theoretically, be
occupied by blanked bog where water is concentrated by convergent curvatures or
large contributing areas. Near community boundaries, bog and heath communities
both occupied similar topographic conditions. Since these boundary locations are
capable of supporting the hydrological conditions necessary for bog development,
the heath is likely to be encroached upon by bog. |
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