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What are the methods of geological disaster risk assessment, and what are their advantages and disadvantages?
(1) Geological disaster risk assessment index, according to the Regulations on the Prevention and Control of Geological Disasters of the State Council, its risk level is determined according to the size of disasters or dangerous situations. The evaluation index is disaster+danger.
② Technical route of geological hazard risk assessment:
A) Geological hazard risk probability (rainstorm frequency) →b) Geological hazard danger zone range prediction →c) Geological hazard risk calculation and determination of its risk grade →d) Determination of the occurrence probability (risk) of this risk grade.
③ Geological hazard risk assessment method:
A) Prediction method of geological disaster danger zone:
Qualitative analysis method
Semi-quantitative analysis
Quantitative calculation and prediction methods
B) Calculation method of geological disasters:
Number of people threatened in geological disaster danger zone =? Threatened property =?
Statistical analysis and calculation method
First-order superposition calculation method
See the new method of geological hazard risk assessment in China.
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