Investigation And Optimization Of Green Space Structure In Shanghai Residential Area For Improvinh The Surface Thermal Environment

Under the background of rapid urbanization and the deterioration of urban thermal environment,the problem of heat island has become an urgent problem to be solved.Green space of residential area is the most widely used in urban green space system.The quality of green space has a direct impact on the environmental quality.The research on the mechanism of urban residential space structure in the surface thermal environment is proposed,which can make up for the lack of theoretical research,and provide theoretical and technical support for the scientific planning of residential area.The main research contents and conclusions of this paper are as follows:(1)Analysis of the thermal environment in the different types of residential areaAccording to the urban-rural gradient and construction in 4 different types of communities(Ruijing,Longhua,Xincheng,Fangsong)as the research area,the study area in each typical residential area as the research object.Analysis of the relationship between green space index factor and surface temperature in residential area.The results showed that: 1)Green ratio,arbor ratio,MPS,MPI and surface temperature showed negative correlation;MNN,PD were positively correlated in Ruijing.2)Green Ratio,arbor ratio,PSCV and the surface temperature were negative correlation,building density,MNN were positive correlation in Longhua.3)Green ratio,arbor ratio was negatively correlated with surface temperatures,building density were positively correlated in Xincheng.4)Building density were positively correlated with surface temperature;green ratio,arbor ratio were negative correlation in Fangsong.5)Comprehensive analysis of 4 types of research object,analysis of the main factors that affect the surface temperature of residential area in Shanghai City.The research shows that: The surface temperature of the residential area in Shanghai city had negative correlation with green ratio,arbor ratio,MPI,PSCV and MPS;building density,MNN and PD were positively correlated.(2)Evaluation of thermal environment index of residential areat in Shanghai CityIn the sunny breeze,when the surface temperature reaches 37℃ in summer,TEI=10+(-10A/0.5+47.11B/0.08+0.13C/30).When TEI is 0~2.2,the thermal environment is very good;when TEI is 2.2~6.1,the thermal environment is good;when TEI is 6.1~8.7,the thermal environment is poor;when TEI>6.1,the thermal environment is very bad.(3)Verification of the optimization of the thermal environment in residential areaIn the 4 different types of the study area,selected Lane Yandang Road,Huilong garden,Hao Shi Lu Ming Yuan and Shi Xian Yuan as a typical residential area,simulating a dynamic micro climate within 24 hours in ENVI-met.The results show that the average surface temperature of the four residential area is reduced by 0.27,0.19,0.19,and 0.23℃,and the surface temperature distribution is more average.After optimization,the thermal environment of residential area is improved.