Study On Risk Assessment Of High Temperature Disaster And Built Environment Impact In Wuhan Community

Under the background of rapid urbanization and global warming,high temperature disasters pose a serious threat to urban safety and residents' health.In response to the requirements of land and space planning for improving the quality of human settlements and healthy cities for sustainable development of communities,it is particularly critical to avoid the risk of high temperature disasters by optimizing the built environment of communities.There are profound theoretical basis and Experimental Research on urban high temperature disaster risk assessment and built environment impact factors at home and abroad,but there are also some shortcomings,which are as follows: the existing research focuses on the national,regional and urban scale,and pays less attention to the high temperature disaster risk of urban community units;the existing research focuses on the theoretical basis of built environment impact factors of high temperature disaster The explanation is rather general,which fails to distinguish the different impacts of built environment in different risk areas;existing studies have failed to put forward different optimization strategies for communities in different urban areas based on the differences of risk areas.In order to make up for the above deficiencies,this study conducted a comprehensive assessment of the high temperature disaster risk in urban communities,and used geographically weighted regression model to analyze the main built-up environmental factors and spatial heterogeneity of community surface temperature in high-risk areas and low-risk areas.On the basis of GIS data,this paper carries out the following research:Wuhan City built-up community risk assessment based on GIS data and fuzzy cluster analysis The results show that the impact of environment on the high temperature disaster is different,and the strategies to reduce the risk of high temperature disaster are proposed.It is found that the risk of high temperature disaster in community is mainly evaluated from three dimensions: the risk of high temperature disaster,the sensitivity of disaster pregnant environment and the vulnerability of disaster bearing body.The comprehensive risk presents the spatial pattern of multi axial extension in high-risk area and water ring along the river in low-risk area.The high temperature disaster in community is affected by normalized vegetation index,building coverage ratio,vegetation coverage ratio,water body coverage ratio and building density The results show that there are significant differences in the effectiveness and spatial differentiation of the main influencing factors in different risk areas;the mitigation of high temperature disaster risk in communities should be carried out from two aspects: overall optimization and differential optimization of high-risk communities in different urban areas.The research conclusions are helpful to refine the research results in the field of high temperature disaster risk assessment and built environment impact factors,and build a comprehensive debugging optimization framework of risk identification impact differentiation difference optimization,which provides theoretical support for urban high temperature disaster prevention and mitigation planning,and provides planning guidance for community built environment optimization to reduce the risk level of high temperature disaster.