The Research On The Regionalization And Prevention Countermeasures Of The Geological Hazards In ChengCheng County

ChengCheng county is located in northeastern guanzhong basin, where terrain is relatively Complicated, In recent years, with the human construction activities intensified, the geological disasters frequent occurred, So human being's life and wealth are seriously threatened, and local economic construction and development are strongly restricted.This paper analyses the type, scale, development feature and formation condition of geological disaster in ChengCheng county. and using the grey relational analysis and fractal theory result that the geological disaster system in ChengCheng county have spatial fractal feature and the fractal dimension value is 0.89, which proof that the result of relationship analysis of geological disaster influence factor of the first four township which were arranged by the number of potential geological hazard points being random selected in ChengCheng is reliable, and the regionalization research of geological disaster in ChengCheng can be taken by physiognomy, rock soil mass types, annual rainfall and the intensity of human engineering activity.According to the result of ChengCheng geological disaster analysis, doing the MAPGIS spatial analysis to the main control factor (physiognomy, rock soil mass types) and influence factor (annual rainfall, the intensity of human engineering activity), result the lability regionalization of geological disaster in ChengCheng.According to the natural geological environmental conditions of this region, selecting eight evaluation factors, which are lithological characters, structure density, degree of slope, relative height difference, morphologic type, rainfall intensity, density of cover and human condition, establishing the hierarchical structure model of geological hazard risk assessment, the two-level model of fuzzy synthesize assessment method is selected to assess the danger of regional geological hazard, the whole region is divided into four stages which are high-risk area, medium-risk area, low-risk area and non-risk area. The result of analysis is basically tallies with the practical disaster situation which result the method applying in the geological disaster regionalization research is scientific and with reason.The prevention measures of geological hazard in Chengcheng coutry mainly is preventing collision, then is engineering control with monitoring, combining with biological treatment as well.