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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Nat. Hazards Earth Syst. Sci., 18, 687-708, 2018
https://doi.org/10.5194/nhess-18-687-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
02 Mar 2018
Scale and spatial distribution assessment of rainfall-induced landslides in a catchment with mountain roads
Chih-Ming Tseng1, Yie-Ruey Chen1, and Szu-Mi Wu2 1Department of Land Management and Development, Chang Jung Christian University, Tainan, 71101, Taiwan (ROC)
2Chen-Du Construction Limited, Taoyuan, 33059, Taiwan (ROC)
Abstract. This study focused on landslides in a catchment with mountain roads that were caused by Nanmadol (2011) and Kong-rey (2013) typhoons. Image interpretation techniques were employed to for satellite images captured before and after the typhoons to derive the surface changes. A multivariate hazard evaluation method was adopted to establish a landslide susceptibility assessment model. The evaluation of landslide locations and relationship between landslide and predisposing factors is preparatory for assessing and mapping landslide susceptibility. The results can serve as a reference for preventing and mitigating slope disasters on mountain roads.
Citation: Tseng, C.-M., Chen, Y.-R., and Wu, S.-M.: Scale and spatial distribution assessment of rainfall-induced landslides in a catchment with mountain roads, Nat. Hazards Earth Syst. Sci., 18, 687-708, https://doi.org/10.5194/nhess-18-687-2018, 2018.
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Short summary
The multivariate evaluation method was applied to establish a landslide susceptibility assessment model along mountains roads. The relationships between the rainfall index, instability index, and landslide occurrence indicate that for a high instability index, even a small rainfall event could trigger a landslide. The instability index thus can effectively reflect landslide susceptibility. The results could serve as a reference for the prevention and mitigation of slope disasters on hillsides.
The multivariate evaluation method was applied to establish a landslide susceptibility...
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