the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Potential Impact of Landslide and Debris Flow on Climate Extreme – A Case Study of Xindian Watershed in Taiwan
Shih-Chao Wei
Hung-Ju Shih
Hsin-Chi Li
Ko-Fei Liu
Abstract. Sedimentary produced and transported in mountainous area under extreme rainfall by climate change is a challenged issue in recent years, especially in a watershed scale. The scenario approach with coupled simulation by different models could be one of a solution for further discussion under warming climate. With properly model selection, the simulation of projected rainfall, landslide, and debris flow are integrated by fully connection between models. Moreover, a case in Xindian watershed upstream the capital of Taiwan is chose for studying, and two extreme scenarios in late 20th and late 21st century are selected for comparison on changing climate. With sequent simulation, the chain process and compounded disaster can be considered in our analysis. The potential effects of landslides and debris flows are compared between current and future, and the likely impact in selected watershed are discussed under climate extreme. Result shows the unstable sediment volume would enlarge 29 % in terms of projected extreme event. The river bed may have strong variation by serious debris flow and increase about 10 % elevation in main channel. These findings also highlight the increasing risk in stable water supply, isolated village effect, and other secondary disaster in this watershed. A practical reference could be provided by some critical information in our result for long-term adapted strategies.
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Preprint
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Shih-Chao Wei et al.
Interactive discussion


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RC1: 'Review on nhess-2017-262: Potential Impact of Climate Change and Extreme Events on Slope Land Hazard - A Case Study of Xindian Watershed in Taiwan', Anonymous Referee #1, 09 Oct 2017
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RC2: 'Evaluation report', Anonymous Referee #2, 27 Nov 2017
Interactive discussion


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RC1: 'Review on nhess-2017-262: Potential Impact of Climate Change and Extreme Events on Slope Land Hazard - A Case Study of Xindian Watershed in Taiwan', Anonymous Referee #1, 09 Oct 2017
-
RC2: 'Evaluation report', Anonymous Referee #2, 27 Nov 2017
Shih-Chao Wei et al.
Model code and software
Numerical simulation of debris flow with application on hazard area mapping K.-F. Liu and M. C. Huang https://doi.org/10.1007/s10596-005-9020-4
Shih-Chao Wei et al.
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