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| Titel |
Particle flow and segregation in a giant landslide event triggered by the 2008 Wenchuan earthquake, Sichuan, China |
| VerfasserIn |
L. M. Zhang, Y. Xu, R. Q. Huang, D. S. Chang |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 4 ; Nr. 11, no. 4 (2011-04-26), S.1153-1162 |
| Datensatznummer |
250009347
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1153-2011.pdf |
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| Zusammenfassung |
| During the 12 May 2008 Wenchuan earthquake, a large
landslide of approximately 30 million m3 occurred at Donghekou with a
particle run-out distance of over 2000 m. This paper presents fascinating
particle flow and segregation characteristics in the landslide process found
through field investigation of changes in the soil particle size, density,
and fabric along the particle movement paths. The soil particles experienced
projection, long-distance flying, sliding, and rolling. Trajectory
segregation, inverse grading, and particle crushing were found in the
landslide event, which contributed to the heterogeneity of the soil
deposits. In the initial deposition area, particles with larger diameters
appeared to have flown longer. Materials from different sources mixed,
forming more uniform debris. In the run-out area, the particle flow tended
to cause large particles to travel further. However, particle disintegration
and crushing led to more small particles along the movement paths and the
observed characteristic flow distances of very large particles did not
increase with the particle diameter, which is different from observations of
an idealized granular mass flow. |
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