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| Titel |
Throughfall and temporal trends of rainfall redistribution in an open tropical rainforest, south-western Amazonia (Rondônia, Brazil) |
| VerfasserIn |
S. Germer, H. Elsenbeer, J. M. Moraes |
| 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 ; 10, no. 3 ; Nr. 10, no. 3 (2006-06-02), S.383-393 |
| Datensatznummer |
250008062
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| Publikation (Nr.) |
 copernicus.org/hess-10-383-2006.pdf |
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| Zusammenfassung |
| Throughfall volumes and incident rainfall were measured between 23
August and 2 December 2004 as well as from 6 January to 15 April
2005 for individual rain events of differing intensities and
magnitudes in an open tropical rainforest in Rondônia, Brazil.
Temporal patterns of throughfall spatial variability were
examined. Estimated interception was compared to modeled
interception obtained by applying the revised Gash model in order
to identify sources of throughfall variability in open tropical
rainforests.
Gross precipitation of 97 events amounted to 1309 mm,
89±5.6% (S.E.) of which reached the forest floor as
throughfall. The redistribution of water within the canopy was
highly variable in time, which we attribute to the high density of
babassu palms (Orbignya phalerata), their seasonal leaf
growth, and their conducive morphology. We identified a 10-min
rainfall intensity threshold of 30 mmh-1 above which
interception was highly variable. This variability is amplified by
funneling and shading effects of palms. This interaction between a
rainfall variable and vegetation characteristics is relevant for
understanding the hydrology of all tropical rainforests with a
high palm density. |
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