The functional relationship between landslide probability and its impact factors is researched through statistics analysis under logistic regression model and the certainty factor (CF) of a landslide along a pipeline project. The hazard zoning map is obtained according to the level of landslide risk by using GIS technology. First, the certainty factor of occurring landslide is calculated according to the area of occurred disasters in impact factor subset and the area of impact factor subset. In subsequence, with the possibility of landslide as dependent variable and the certainty factor in subset as independent variable, the functional relationship under logistic regression model is found out. Then, the landslide probability p is calculated and the research area is divided into 5 sub-areas according to risk levels, and the risk zoning map is given. Finally, the risk zoning result is evaluated based on landslide distribution data. The result shows that the hazard zonation method based on logistic regression model and certainty factor for landslide is effective and is suitable for the risk zoning of landslide along pipeline project.
Key words
landslide /
logistic regression model /
certainty factor /
hazard zonation
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References
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