Research On The Microclimate And Optimization Strategy Of Public Green Space In Winter Residential Districts In Cold Cities

Creating a comfortable residential environment is the common wish of residents and planners.Public green space accounts for a large proportion of the greening of residential areas,and its microclimate quality has a greater impact on residents' activities and the climate environment.Therefore,studying the microclimate environment of public green space is of great significance to residential planning.This paper takes Daqing City as an example to study the microclimate of public green spaces in residential areas in cold cities.First,it investigated the spatial pattern of public green space in residential areas in Daqing City,analyzed the relationship between residents' behavior and the green space climate environment,and conducted a microclimate measurement analysis in the study area.Then,with the help of Envi-met,different elements are extracted from the perspective of the spatial form of the building and the green space,and the microclimate environment of the public green space under different schemes is simulated and analyzed by the method of control variables,and the optimization strategy is summarized and applied to the example to verify the effect.In the end,the following conclusions were reached:Architectural space form: The determinant,enclosed + determinant layout in the building layout is conducive to the stability of the microclimate of the green space in winter,and the microclimate improvement effect of the row and staggered layout is the second;when the building height is 20m?54m,the height The higher the height,the worse the wind environment of the building space,and the unstable temperature and humidity of the green space;if conditions permit,the building density should be controlled between 15% and 25%.At this time,the microclimate environment of the public green space is better;when the building is in the open space When the direction is perpendicular or parallel to the dominant wind direction,although the temperature environment still needs to be improved,there is a better wind environment and humidity environment,and the overall microclimate is more suitable;the architectural space layout should avoid openings in the dominant wind direction as much as possible,which is beneficial to both inside and outside.Air exchange also helps to improve the microclimate in the green space;when the length of the building's opening direction is between 32-60 m,the longer the length,the better the improvement of the microclimate.When the width of the building is between 12 and 20 m,the smaller the width,the more conducive to the stability of the microclimate;when the height-to-width ratio of the building is between 1.25:1 and 4:1,the higher the ratio,the less conducive to the improvement of the microclimate of the public green space.The internal space form of the green space: when it does not affect the planning of other spaces in the residential area,try to expand the scale of public green space,reduce wind speed in the winter green space,and have a significant effect on heat preservation and humidification;increase the planting ratio of trees and shrubs in the green space,which can effectively enhance the green space When planning the internal space layout of the green space,the design of concentrated large open spaces should be reduced to avoid the phenomenon of high wind speed and low temperature;when the proportion of water in the public green space increases from 0 to 30%,Has little effect on wind speed and temperature.The water body mainly humidifies the surrounding area.