Large-scale simulation of watershed mass transport: a case study of Tsengwen reservoir watershed, southwest Taiwan

Ko-Fei Liu (), Ying-Hsin Wu (), Yi-Chin Chen, Yu-Jia Chiu and Shang-Shu Shih

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2013, vol. 67, issue 2, 855-867

Abstract: We present the large-scale simulation of watershed mass transport, including landslide, debris flow, and sediment transport. A case study of Tsengwen reservoir watershed under the extreme rainfall triggered by typhoon Morakot is conducted for verification. This approach starts with volume-area relation with landslide inventory method to predict temporal and regional landslide volume production and distribution. Then, debris flow model, Debris-2D, is applied to simulate the mass transport from hillslope to fluvial channel. Finally, a sediment transport model, NETSTARS, is used for hydraulic and sediment routing in river and reservoir. Near the water intake at the reservoir dam, the simulated sediment concentration is in good agreement with the measured one. The proposed approach gives good prediction and should help the management of reservoir operation and disaster prevention. Copyright Springer Science+Business Media Dordrecht 2013

Keywords: Large-scale simulation; Watershed; Debris-2D; Sediment transport; Landslide (search for similar items in EconPapers)
Date: 2013
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DOI: 10.1007/s11069-013-0611-4

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