Geological Hazard Analysis And Prevention Countermeasures In Yaozhou Area Of Tongchuan

Yaozhou area is located in the south margin of northern Shaanxi loess plateau, where geological disaster often 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 Yaozhou area, and using the grey relational analysis and fractal theory result that the geological disaster system in YaoZhou area have spatial fractal feature and the fractal dimension value is 0.58, 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 YaoZhou is reliable, and the regionalization research of geological disaster in YaoZhou can be taken by physiognomy, rock soil mass types, annual rainfall and the intensity of human engineering activity.According to the result of YaoZhou geological disaster analysis, doing the grey relational analysis and MAPGIS spatial analysis to the main control factor (physiognomy, rock soil mass types, annual rainfall) and influence factor (the intensity of human engineering activity), result the lability regionalization of geological disaster in YaoZhou. Based on the analysis of the society attribute of geological disaster, take the main factors (the population density, the engineering construction facility, the land utilization type) of society attribute as sub chart, using the expert evaluation model and the MAPGIS spatial analysis function obtained the harmfulness regionalization of geological hazard in YaoZhou. In order to the result of comprehensive division become objective and in reason, this paper divided again based on the result of lability regionalization and harmfulness regionalization, thus getting three large geological disaster area which are respectively major prevention area, second-emphasis prevention area, and general prevention area. The result of spatial 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 main prevention measure of geological disaster regionalization in YaoZhou: take the inspecting and engineering treatment measure to the falling and slide which would be threaten the road and passerby; take the relocation and engineering treatment measure to the falling and slide which threaten the inhabitant; take the inspecting, avoidance, biology and engineering measure to the ground collapse; take the avoidance measure to the ground fissure.