Development and distribution rules of geohazards in Diexi- Songpinggou scenic area in a meizoseismal area

Abstract

The Songpinggou scenic area in Diexi was taken as the study area and there are 107 geological disasters were found, including 82 collapses and 25 landslides in this meizoseismal area. The influencing factors of the development and distribution of geological disasters include: original slope, development elevation, slope structure, water system distance and fault zone distance. The number and scale of disasters are distributed in the slope of 30 ° to 50 ° and the number and scale of disasters are large; the number of disasters with elevation of 2200～3400 m accounts for 42.5% of the total, especially the elevation of 2600～3000 m accounts for 42.5% of the total; the number and scale of geological disasters developed in oblique slope are relatively large, followed by consequent slope and reverse slope; the maximum influence distance of water system on disaster is 4.0 km, in which the range of 0～1 km is within. The results show that the geological disasters are developed and large-scale; the distribution of geological disasters along the seismic fault zone is sub "string beads", and the most significant development is in the range of 0~4.0 km, which conforms to a certain fitting law. Based on the statistical analysis, the main influencing factors of the development of geological disasters in the Songpinggou scenic area of Diexi are determined, and the distribution rules are systematically summarized, which provides scientific basis and reference for the infrastructure construction and disaster prevention and mitigation in the study area.

Keywords

• meizoseismal area
• songpinggou scenic area
• geologic hazard
• development and distribution rules
• interfering factor