Numerical simulation of scouring-deposition variations caused byrainfall-induced landslides in the upstream of Zengwun River, Taiwan

in International Symposium (poster summary), 國際研討會(摘要海報發表)
標題Numerical simulation of scouring-deposition variations caused byrainfall-induced landslides in the upstream of Zengwun River, Taiwan
出版類型國際研討會(摘要海報發表)
出版年度2017
AuthorsMing-Hsi Lee, 李明熹, 廖怡雯, & Jin Bing Lin 蔡光榮
出版日期Apr 23 2017 12:0
會議地點維也納
其他編號0000
中文摘要

In recent years, the increasing sediment disasters of severe rainfall-induced landslides on human lives and lifeline
facilities worldwide have advanced the necessity to find out both economically acceptable and useful techniques
to predict the occurrence and destructive power of the disasters. In August 2009, Typhoon Morakot brought a
large amount of rainfall with both high intensity and long duration to a vast area of Taiwan. Unfortunately, this
resulted in a catastrophic landslide in watershed of Zengwun-River reservoir, southern Taiwan. Meanwhile, large
amounts of landslides were formed in the upstream of Zengwun River. The major scope of this study is to apply
numerical model to simulate the scouring-deposition variations caused by rainfall-induced landslides that occurred
in the upstream of Zengwun River during Typhoon Morakot. This study proposed the relation diagrams of the
intermediate diameter (d50), recurrence interval (T) and scouring-deposition depth (D), and applied the diagrams
to understand the impacts of the scouring-deposition variations on the structures for water and soil conservation
and their measurements. Based on the simulation of scouring-deposition variation at the Da-Bu dam and Da-Bang
dam, this study also discussed the scouring-deposition variations of different sections under different scenarios
(including flow rate, intermediate diameters and structures). In summary, the result suggested that the diagrams
of the intermediate diameter, recurrence interval and scouring-deposition depth could be used as the reference for
designing the check dams, ground sills and lateral constructions.

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