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| Titel |
Discharge of landslide-induced debris flows: case studies of Typhoon Morakot in southern Taiwan |
| VerfasserIn |
J.-C. Chen, M.-R. Chuang |
| 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 Sciences ; 14, no. 7 ; Nr. 14, no. 7 (2014-07-14), S.1719-1730 |
| Datensatznummer |
250118539
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| Publikation (Nr.) |
 copernicus.org/nhess-14-1719-2014.pdf |
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| Zusammenfassung |
| Three debris-flow gullies, the Hong-Shui-Xian (HSX),
Sha-Xin-Kai (SXK), and Xin-Kai-Dafo (XKD) gullies, located in the Shinfa area
of southern Taiwan, were selected as case studies on the discharge of
landslide-induced debris flows caused by Typhoon Morakot in 2009. The
inundation characteristics of the three debris flows, such as the debris-flow
volume V, deposition area Ad, and maximum flow depth, were
collected by field investigations and simulated using the numerical modeling
software FLO-2D. The discharge coefficient cb, defined as the
ratio of the debris-flow discharge Qdp to the water-flow discharge
Qwp, was proposed to determine Qdp, and Qwp
was estimated by a rational equation. Then, cb was calibrated by
a comparison between the field investigation and the numerical simulation of
the inundation characteristics of debris flows. Our results showed that the
values of cb range from 6 to 18, and their values are affected
by the landslide ratio RL. Empirical relationships for
cb versus RL, Qdp versus Qwp,
Qdp versus V, and Ad versus V are also presented. |
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