Spatiotemporal activity characteristic analysis and hazard assessment of rainfall-induced landslide for the Eurasian continent by considering mountain-hazards developing environment differences
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引用次数: 0
Abstract
Landslides often pose a huge threat to the lives and property of people. The detailed analysis of landslide activity characteristics and landslide hazard assessment can help to understand the activity laws of landslides, and identify the possibility of landslide occurrence, which play a key role to take necessary disaster prevention and mitigation measures. In this research, we selected Eurasia as the study area. Firstly, a landslide dataset of the Eurasian continent was analyzed. Based on the Emerging Hot Spot Analysis, obvious hot spots of landslide hazards around the Himalayan Mountains and new cold spots in the Loess Plateau were found. On the other hand, for large scale regions, there are significant differences in landslide-developing environments, and the effects of various causing factors are different significantly. In this research, the weights of landslide-causing factors for different kinds of mountain-hazards developing environments were obtained through the machine learning method (Random Forest). Different landslide hazard assessment models under different mountain-hazards developing Environments were constructed. It solves the problem of using only one model to evaluate landslide hazard in complex disaster environments at a large regional scale without considering regional differences. This also provides a new idea for evaluating the hazard assessment of other mountain hazards at a large regional scale. The results show that the landslide hazard assessment model has obvious regional characteristics and can better realize the purpose of hazard assessment. About 16.35% of the mountain areas in the Eurasian continent belong to very high-hazard and high-hazard areas of landslides. At the same time, the contribution values of different factors in the calculation process based on the hazard assessment models can better identify the main controlling factors and propose the adoption of more targeted disaster prevention and mitigation measures.
期刊介绍：
Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces:
• the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations;
• the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change;
• the assessment of the mechanical and hydrological behaviour of soil and rock masses;
• the prediction of changes to the above properties with time;
• the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
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