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| Titel |
Scale model for the confluent area of debris flow and main river: a case study of the Wenjia Gully |
| VerfasserIn |
J. Zhang, Z. X. Guo, S. Y. Cao, V. P. Singh |
| 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 ; 13, no. 12 ; Nr. 13, no. 12 (2013-12-02), S.3083-3093 |
| Datensatznummer |
250085571
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| Publikation (Nr.) |
 copernicus.org/nhess-13-3083-2013.pdf |
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| Zusammenfassung |
| When debris flow discharges into the main river, the deposition of debris
raises the river bed, occupies the path of water conveyance and damages or
even destroys buildings, resulting in considerable economic loss and
possibly fatalities. Mathematical models are normally employed to compute debris flow.
However, most of these models employ empirical formulae and coefficients and
their results are seldom reliable. On the other hand, scale model tests
associated with debris flow have seldom been conducted due to the lack of
corresponding similarity laws and the difficulty of achieving the grain
diameter scale. Focusing on pseudo-one-phase flow, this paper discusses the
laws of similarity for the confluence of debris flow and main river and
conducts a case study of the debris flow that occurred on 13 August 2010, in
the Wenjia Gully, China. After satisfying the roughness scale, the kinematic
viscosity coefficient scale, and the momentum ratio scale, it was found that
the deposition terrain in the model test is consistent with the one in the
prototype. |
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