Large-scale simulation of watershed mass transport: A case study of Tsengwen reservoir watershed, southwest Taiwan
Journal
Natural Hazards
Journal Volume
67
Journal Issue
2
Start Page
855
End Page
867
ISSN
0921030X
Date Issued
2013
Author(s)
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. © 2013 Springer Science+Business Media Dordrecht.
Subjects
Debris-2D
Landslide
Large-scale simulation
Sediment transport
Watershed
Publisher
Kluwer Academic Publishers
Type
journal article