| Geo-hazard assessment refers to the effective geo-hazard analysis through field surveys and other materials in the area to guide effective geological disasters in the study area.These geological disasters such as landslides,mudslides,and collapses are endangered,and life and property are endangered.Economic activities or the destruction of human resources for survival and development,the natural geological role of the environment and the deteriorating geological environment caused by human activities,reducing the quality of the environment,directly or indirectly endanger human safety,and cause geological and economic losses to the society and economic construction.Minimize the loss of life and property as much as possible.This paper collects and collates the field balance data and the previous geological data of the study area.Based on the principles and methods of geological disaster risk assessment,this paper mainly extracts data from several specific indicators of the study area,and The structural model of the AHP is based on factors such as geological conditions,topography,meteorological and hydrological conditions,and human engineering activities.Gradient,aspect,unreasonable slope,agricultural land,artificial building,vegetation cover,engineering stratum are selected.The lithology,the distance from the fault zone,and the evaluation factors of major rivers,etc.build the judgment matrix.Using the analytic hierarchy process,the differences in different factors have been quantified and their regularity has been shown through the calculation of the evaluation index,so that a more accurate and reliable risk level division has been obtained in the study area.The result of geological disaster risk assessment is that the dangerous area accounted for 48.7% of the area of the dangerous area,mainly in the Meihuagou main ditch area,and the risk assessment result of geological hazards is a moderately dangerous area,accounting for 31.5% of the area of the danger area.It is mainly distributed in the areas of Wangjiayaozi and Jinjiagou,and the risk assessment result of geological hazards is an area with low risk,accounting for 19.8% of the area of the dangerous area,mainly distributed in Xinzhuangzigou area. |
