Research On The Cooling Mode Of Urban Road Greening

As the global warming trend intensifies,the hot weather in the summer city continues for a long time,causing a series of urban environmental problems and seriously affecting the health of urban residents.Under the premise that solar radiation,the main heat source,cannot be controlled,greening,as a passive and extremely comprehensive ecological benefit cooling method,has been paid more and more attention by people.Urban roads have the highest frequency of use and are most closely related to people's daily life.The urban public space has become particularly important to improve its microclimate environment through research on its green space form.This paper takes the climatic conditions of Zhengzhou City and the main urban road as experimental objects,and explores the road greening space with the best cooling effect as the main target.Firstly,the cooling effect of the two main cooling elements of road shade coverage and road ventilation is compared.Taking the most common sunny,high temperature and breezy weather in summer as experimental conditions,according to the experimental principle of Muller causality and five methods,the leeward direction road with high shade coverage and the downwind road covered with no shade are selected as observation samples.The observation data of the two are compared,and repeated observations are carried out under different temperature and wind speed conditions to obtain the cooling effect between the shade coverage and the ventilation factors in Zhengzhou's summer constant weather conditions.The difference is used as a reference for the fuzzy weight relationship in the design of road green space.Secondly,under the high temperature and climatic conditions in summer,the shade coverage and ventilation are taken as an ideal road environment.Considering the contradiction between the road section green space structure and the road ventilation effect,this paper is also in the same downwind environment.The cooling effect of the same road plate type different road section green space form is tested and compared,so that in different road layouts,the road greening space form with the best shading,ventilation and cooling effect is selected,according to the research results of Zhengzhou The simulation design of the green space section of different slab roads in the city was carried out.On the premise that the cooling effect is the main evaluation index,the advantages and disadvantages of different green space forms are analyzed and judged by taking into account the factors such as motorway ventilation,vehicle exhaust gas diffusion,isolation dust noise,winter color,and root system impact on the road surface.Reasonable tree species configuration mode.