The risk evaluation of Shandong geological hazards based on hierarchical fuzzy theory

Abstract

Geological hazards has caused a great loss to mankind, which frequently occurs in Shandong province. According to the established selection principles of geological hazard risk evaluation indexes to select more than 20 evaluation indexes such as geological conditions, geological hazard risk evaluation system of Shandong province is established. By using hierarchical analysis model based on many-year data to calculate the weight value of each index, geological hazard risk of Shandong is segmented into four levels as high risk, medium risk, low risk, risk-free. Through the classification criteria of geological hazard risk evaluation to grade, using membership function to get fuzzy comprehensive evaluation matrix, the fuzzy evaluation model of Shandong geological hazard risk evaluation is established. This method is professional, reasonable, and scientific, which provides theoretical basis for accurately assessing geological hazard risk.

Keywords:

• Geological hazards
• Weight
• Membership function. risk
• evaluation