Study On Green Quantity Distribution And Its Thermal Environment Impact In High Density Community

In recent years,the development of urban high density has promoted the heat island effect,but also led to the lack of community green space,and vegetation as the main body of urban ecological construction,for regulating the temperature,ease the heat island effect has a very important role.The current amount of greening at the traditional two-dimensional level can not truly reflect the ecological benefits of vegetation types and community hierarchical structure.In this paper,the green volume as the starting point,the main work and research conclusions are as follows:Firstly,the spatial distribution of green quantity in Haidian District of Beijing was studied by remote sensing data and ENVI platform.Based on the community survey in Haidian District,seven high-density communities with similar environmental conditions,building layout and green layout were compared,And finally to determine the Shuguang Garden community for further vegetation survey and thermal environment of the work of the sample community.Secondly,based on field investigation and GIS platform,the spatial distribution of vegetation,spatial organization,green quantity,green quantity per unit area and vegetation distribution were analyzed.Thirdly,the spatial distribution characteristics of temperature and relative humidity in Shuguang Garden community at different times in summer were studied by using a large amount of measured temperature and humidity data and spatial interpolation analysis of GIS.Finally,the influence of the difference of green quantity on the thermal environment was studied from the three aspects of land use function,green quantity per unit area and vegetation matching mode.The study found that the green geothermal environment will show different temperature and humidity differences with the different functions of the land.The temperature of the green space in the Shuguang Garden community is as follows:green space>green space>green space>residential land,relative humidity is opposite;In the surrounding residential space green space cooling and humidification effect is better than the decentralized space green space;use Origin function software,found that the green space due to scattered and affected by the shadow of the building,the cooling effect of moisturizing effect per unit area and green Correlation;the green area of the central green area is greater than 1m3/m2,and significantly related to the cooling capacity,when the green area per unit area more than 5m3/m2,the cooling capacity tends to be gentle;humidification effect and the green per unit area Which is related to the environment and location of the green space.Compared with the same area,the same unit area green volume interval of the tree type,shrub grass,grass grass,Qiao irrigation green soil cooling effect,The effect of cooling and humidification is obvious,and the cooler is the fastest in the evening.For the green space with different green quantity,the influence of the green quantity of the tree on the cooling effect is obvious,No significant effect on the humidification effect.The study also further confirms the architectural space organization form,and the architectural shadow directly affect the greenfield temperature field pattern;the community adopts the enclosed centralized layout,and the formation of the continuous scale of the central area of the patch has a good cooling Humidification capacity.