Ecological Risk Assessment Of The Coastal City Of Liaoning Province And Spatial Differentiation Characteristics Research

Ecological Risk Assessment originated in human health riskassessment,animportantcomponent of environmental risk assessment,In recent years,environmental pollution、naturaldisasters and other events occur frequently, the human material and spiritual aspects of both ahuge impact. Coastal cities due to its special geographical location, Caused population density,traffic tension, economically developed, etc. As social and economic overall development,raise the level of Ecosystem risk, and gradually being general concern of domestic andinternational scholars.Ecological Risk Assessment aims to reduce the probability of risk,provide theoretical support for risk management, so that to minimize the loss of ecologicalenvironment. Urban ecosystem is characterized by complex openness, ecological riskassessment research object are natural, human, social and economic.Based on the research focus of ecological risk, in-depth study of definition,characteristics, methods and influencing factors of ecological risk, through related research onthe ecological risks of domestic and international summary, according to local conditions,From the vulnerability, exposure, sensitivity, hazardous and disaster prevention andmitigation five aspects selected28evaluation indexes, using Entropy Weight method todetermine the weights, and build a coastal city ecological risk assessment systemIn this paper, the six coastal city of Liaoning province as the research object, collect rawdata according to impact factor, by standardizing processing and computing, ecological riskassessment results obtained,and use of related software according to its value, draw thecoastal city spatial differentiation chart of vulnerability, exposure, sensitivity, harm, disasterprevention and mitigation and integrated ecological risk, Intuitive exhibited differentiationcharacteristics between the coastal six cities, and detailed analysis of the causes of thedifferences, and detailed analysis of the causes of the differences, The results showed that thehighest degree of ecological risk in coastal areas in Liaoning is Huludao City, Compositeindex reached more than0.84；Degree of risk in the middle of the city were Dandong, Jinzhou,Panjin, Yingkou，its composite index between0.80-0.84；At low risk of the city is Dalian, thecomprehensive index of less than0.78.Through the six cities of Liaoning coastal ecological risk assessment,to verify thereasonableness of the evaluation system, Combined with the study area based on the actualresults of the evaluation, proposal to lower the ecological risk, And summarize the deficiencies of this study and issues to be improved, Provide a reference and basis for futurestudies of ecological risk theory.