Abstract—Rainfall-induced debris flow caused by climate change has recently become a threat to human life worldwide. Types of rainfall characteristics, namely, high rainfall intensity for a short duration, high accumulated rainfall for a long duration, and postseismic effects were investigated to build a 3D rainfall threshold surface for debris flow warning. Rainfall parameters including effective accumulated rainfall, intensity, and duration were investigated in the 3D analysis. The construction of a 3D rainfall threshold surface enhances knowledge on the rainfall characteristics that initiate debris flows. Rainfall monitoring in consideration of different rainfall characteristics can improve predictions of debris flow and thus facilitate the issue of timely warnings.
Index Terms—Debris flow, warning, 3D, rainfall threshold.
Chien-Yuan Chen is with the National Chiayi University, Chiayi City 60004, Taiwan (e-mail: chienyuc@mail.nacy.edu.tw).
Ho-Wen Chen is with the Department of Environmental Science and Engineering, Tunghai University, Taichung City 40704, Taiwan R.O.C. (e-mail: hwchen@thu.edu.tw).
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Cite: Chien-Yuan Chen and Ho-Wen Chen, "Construction of 3D Rainfall Threshold Surface for Debris Flow Warning," International Journal of Engineering and Technology vol. 10, no. 3, pp. 249-253, 2018.
