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Article

GIS-Based Three-Dimensional SPH Simulation for the 11 April 2018 Yabakei Landslide at Oita Nakatsu, Japan

1
School of Civil Engineering, Central South University, Changsha 410075, China
2
Three Gorges Research Center for Geo-Hazards, Ministry of Education, China University of Geosciences, Wuhan 430074, China
3
Key Lab of Mountain Hazards and Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
4
Department of Civil Engineering, Kyushu University, Fukuoka 819-0395, Japan
*
Author to whom correspondence should be addressed.
Academic Editor: Arthur Mynett
Water 2021, 13(21), 3012; https://doi.org/10.3390/w13213012
Received: 24 September 2021 / Revised: 18 October 2021 / Accepted: 25 October 2021 / Published: 27 October 2021
(This article belongs to the Special Issue Remote Sensing and GIS for Geological Hazards Assessment)
Landslides are usually triggered by strong earthquakes, heavy rainfalls, or intensive human activities in common wisdom. However, an unexpected landslide occurred in the Yabakei area, Nakatsu, Oita, Japan, at the pre-dawn hour 3:50 a.m. on 11 April 2018, without any accompanying rainfall and earthquake records during the event. This catastrophic landslide was 200 m in width, 110 m in height, and 60,000 m3 in mass volume, damaging four residential buildings with fatalities of six residents at the landslide toe. Field investigation was conducted immediately to identify geological setting, hydrological condition, and landslide geomorphological characteristics. Key findings speculate that infiltration of groundwater stored in the internal fractures led to the swelling and breaking of illite and askanite in the weathered sediment rocks, resulting in the failure of the Yabakei landslide. To reproduce and explore the dynamic process of this landslide event, based on spatial GIS data, we applied the proposed three-dimensional, Herschel-Bulkley-Papanastasiou rheology model-based smooth particle hydrodynamics (HBP-SPH) method to simulate the landslide dynamic process. Buildings in the landslide area are covered by a set of surfaced cells (SC) to analyze the mass impact on the residential buildings. Results showed good accordance between observation and simulation by the proposed SC-HBP-SPH method. The landslide impact force to the residential buildings could be up to 4224.89 kN, as indicated by the simulation. View Full-Text
Keywords: landslide; triggering mechanism; smooth particle hydrodynamics; surface cell; impact force landslide; triggering mechanism; smooth particle hydrodynamics; surface cell; impact force
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MDPI and ACS Style

Han, Z.; Yang, F.; Li, Y.; Dou, J.; Chen, N.; Hu, G.; Chen, G.; Xu, L. GIS-Based Three-Dimensional SPH Simulation for the 11 April 2018 Yabakei Landslide at Oita Nakatsu, Japan. Water 2021, 13, 3012. https://doi.org/10.3390/w13213012

AMA Style

Han Z, Yang F, Li Y, Dou J, Chen N, Hu G, Chen G, Xu L. GIS-Based Three-Dimensional SPH Simulation for the 11 April 2018 Yabakei Landslide at Oita Nakatsu, Japan. Water. 2021; 13(21):3012. https://doi.org/10.3390/w13213012

Chicago/Turabian Style

Han, Zheng, Fan Yang, Yange Li, Jie Dou, Ningsheng Chen, Guisheng Hu, Guangqi Chen, and Linrong Xu. 2021. "GIS-Based Three-Dimensional SPH Simulation for the 11 April 2018 Yabakei Landslide at Oita Nakatsu, Japan" Water 13, no. 21: 3012. https://doi.org/10.3390/w13213012

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