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| Titel |
Spatial variability in floodplain sedimentation: the use of generalized linear mixed-effects models |
| VerfasserIn |
A. Cabezas, M. Angulo-Martínez, M. Gonzalez-Sanchís, J. J. Jimenez, F. A. Comín |
| 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 ; 14, no. 8 ; Nr. 14, no. 8 (2010-08-25), S.1655-1668 |
| Datensatznummer |
250012406
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| Publikation (Nr.) |
 copernicus.org/hess-14-1655-2010.pdf |
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| Zusammenfassung |
| Sediment, Total Organic Carbon (TOC) and total nitrogen (TN) accumulation
during one overbank flood (1.15 y return interval) were examined at one
reach of the Middle Ebro River (NE Spain) for elucidating spatial patterns.
To achieve this goal, four areas with different geomorphological features
and located within the study reach were examined by using artificial grass
mats. Within each area, 1 m2 study plots consisting of three
pseudo-replicates were placed in a semi-regular grid oriented perpendicular
to the main channel. TOC, TN and Particle-Size composition of deposited
sediments were examined and accumulation rates estimated. Generalized linear
mixed-effects models were used to analyze sedimentation patterns in order to
handle clustered sampling units, specific-site effects and spatial
self-correlation between observations. Our results confirm the importance of
channel-floodplain morphology and site micro-topography in explaining
sediment, TOC and TN deposition patterns, although the importance of other
factors as vegetation pattern should be included in further studies to
explain small-scale variability. Generalized linear mixed-effect models
provide a good framework to deal with the high spatial heterogeneity of this
phenomenon at different spatial scales, and should be further investigated
in order to explore its validity when examining the importance of factors
such as flood magnitude or suspended sediment concentration. |
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