GEOLOGICAL HAZARD ASSESSMENT OF SMALL TOWNS BASED ON MULTI-LEVEL FUZZY COMPREHENSIVE METHOD

Small towns are the link connecting major cities and villages,their rapidly development is significantly restricted by geological disasters.Geological hazard assessment is objective need for sustainable development of small towns.Taking Longshan town and Agan town as examples,we have established three-level fuzzy comprehensive evaluation model of geological hazard assessment and detailed evaluation index system,identified the main geological disaster types are landslide,debris flow,unstable slope and land collapse et al,carried out three-level fuzzy comprehensive evaluation of geological hazard.The results show that: in accordance with the four level of not easy-happening,low easy-happening,medium easy-happening and high easy-happening,Longshan town is low easy-happening area and Agan town is high easy-happening area of geological hazards,the results are more close to the reality.It shows that multi-level fuzzy comprehensive method is an effective way to achieve the transition from single-factor qualitative evaluation to multi-factor quantitative comprehensive evaluation in the evaluation of geological hazard.