Simulation of Sediment Transport Caused by Landslide at Nanhua ReservoirWatershed in Southern Taiwan

in International Symposium (poster summary), 國際研討會(摘要海報發表)
標題Simulation of Sediment Transport Caused by Landslide at Nanhua ReservoirWatershed in Southern Taiwan
出版類型國際研討會(摘要海報發表)
出版年度2016
AuthorsMing-Hsi Lee, 李明熹, H. C. - G., & L. H. - H.
出版日期Apr 17 2016 12:0
會議地點維也納
其他編號0000
中文摘要

As a result of heavy rainfall, steep topography, young and weak geological formations, earthquakes, loose soils,
slope land cultivation and other human disturbance, much area in Taiwan are prone to the occurrence of disastrous
mass movements such as landslides and sediment disasters. During recent years, the extreme rainfall events brought
huge amounts of rainfall and triggered severe changes in watershed environments. Typhoon Morakot in August
2009 caused severe landslides, debris flow, flooding and sediment disasters induced by record-break rainfall. The
maximum rainfall of mountain area in Chiayi, Tainan, Kaohsiung and Pingtung County were over 2,900 mm. The
study area is located at Nanhua reservoir watershed in southern Taiwan. The numerical model (HEC-RAS 4.1
and FLO-2D) will be used to simulate the sediment transport caused by landslide and the study will find out the
separating location of erosion and deposition in the river, the danger area of riverbank, and the safety of the river
terrace village under the return period of 50-year, 100-year and 200-year (such as Typhoon Morakot). The results
of this study can provide for the disaster risk management of administrative decisions to lessen the impacts of
natural hazards and may also be useful for time-space variation of sediment disasters caused by Climate Change.

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