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Discharge of landslide-induced debris flows: case studies of Typhoon Morakot in southern Taiwan
| Content Provider | Semantic Scholar |
|---|---|
| Author | Chen, Jianjia Chuang, M.-R. |
| Copyright Year | 2014 |
| Abstract | Abstract. 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. |
| Starting Page | 1719 |
| Ending Page | 1730 |
| Page Count | 12 |
| File Format | PDF HTM / HTML |
| DOI | 10.5194/nhess-14-1719-2014 |
| Volume Number | 14 |
| Alternate Webpage(s) | https://www.nat-hazards-earth-syst-sci.net/14/1719/2014/nhess-14-1719-2014.pdf |
| Alternate Webpage(s) | https://www.nat-hazards-earth-syst-sci-discuss.net/2/315/2014/nhessd-2-315-2014.pdf |
| Alternate Webpage(s) | https://doi.org/10.5194/nhess-14-1719-2014 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
