Study On Geological Hazard Risk Assessment Of Water Conservancy And Hydropower Engineering In Shanxi Province

Shaanxi Province is located between the two major river basins of the Yellow River and the Yangtze River.There are many rivers and abundant hydraulic resources.The construction of water conservancy and hydropower projects can make more reasonable,efficient and scientific use of water resources.However,Shaanxi Province has large latitudes and complicated geological conditions,which has inevitably induced geological disasters during the construction and operation of water conservancy projects.Therefore,there is an important value for scientifically ensuring the safe production and operation of water conservancy and hydropower projects,reducing the losses caused by geological disasters,providing a reliable basis for disaster prevention and mitigation,and conducting geological disaster risk assessment and zoning research for water conservancy and hydropower projects in Shaanxi Province.This paper takes Shaanxi Province as a research area to conduct a full investigation of various geological hazards related to water conservancy and hydropower projects in the area,combined with regional geological background data,detailed analysis of the relevant geological hazards,and the establishment of various factors with the help of GIS technology Evaluation index system,so as to classify the risk grades of geological disasters of water conservancy and hydropower in Shaanxi Province,and evaluate the risks of water resources and hydropower geological hazards in the study area.The main results achieved in this article are:(1)The types,characteristics and distribution of water and hydropower geological disasters in Shaanxi Province are analyzed.The study shows that the water and hydropower geological disasters in Shaanxi Province are mainly affected by geographical environmental factors and induced factors;among them,geological disasters are mainly distributed in the Weihe River.There are also a small number of concentrated distributions in the watershed,the water conservancy engineering facilities in northern Shaanxi and southern Shaanxi.(2)Study the proportion of geological disasters of water conservancy and hydropower under various influencing factors,compare the correlation of geological disasters with various indicators,and determine the seven items of slope,elevation,lithology,landform,structure,river and disaster site density as the susceptibility evaluation index,combined with the two inducible factors of water conservancy engineering activities and rainfall,constitutes nine risk evaluation indexes.(3)Analyze the economic loss caused by surrounding assets and resources when a geological disaster occurs,and determine that the reservoir,water diversion project and land loss are used as evaluation indicators to form a vulnerability assessment system;complete the risk assessment in conjunction with the risk.(4)Based on GIS and analytic hierarchy process model,low-prone risk accounts for 59.45%,medium-prone risk accounts for 33.64%,high-prone risk accounts for 6.92%;low-risk risk accounts for 56.37%,and moderate risk accounts for 35.15%,High risk accounted for 8.48%;low vulnerability accounted for 98.20%,medium vulnerability accounted for 0.67%,high vulnerability accounted for 1.13%;very low risk accounts for 98.50%,low risk accounted for 0.51%,medium The risk accounts for 0.76%,and the high risk accounts for 0.23%.(5)Based on GIS and fractal theory models,low-prone risk accounts for 63.45%,medium-prone risk accounts for 25.09%,high-prone risk accounts for 11.46%;low-risk risk accounts for 47.44%,medium risk 37.46%,high risk accounts for 15.10%;the vulnerability assessment zone is consistent with the analytic hierarchy process;in the risk zone,very low risk accounts for 98.51%,low risk accounts for 0.43%,medium risk accounts for 0.84%,and high risk accounts for 0.22%.