Study On Plant Dust Retention Effect And Plnt Landscape Transformantion In Old Residention Areas Of Changchun City From The Perspective Of Ecological Resilience

Old residential areas are one of the main concentration areas of urban population,and also the main place for the daily life of elderly residents.At present,research on the renovation of plant landscapes in old residential areas mostly focuses on public spaces,community infrastructure,and individual plant configurations.However,there are few reports on the adsorption capacity of atmospheric particulate matter by different plant configurations of plant landscapes in the area.Research on plant dust retention mainly focuses on the dust retention capacity,ecological capacity,and adsorption capacity of individual plants for particulate matter,as well as the reduction of particulate matter in functional green spaces and green space coverage.This article takes the old residential areas in Changchun City as the object,and conducts on-site monitoring of the plant configuration structure and building gap PM₁₀in the residential areas.By comparing and analyzing the effects of different types of plant configuration and building layout structure on PM₁₀concentration and the influencing factors between meteorological factors in the residential areas,the dust retention ability and controllability of plant configuration from a resilient perspective are maximized in the limited space of the old residential areas,Furthermore,the indicators and econometric models for plant dust retention resilience in old residential areas are derived.The main research conclusions are as follows:（1）The daily variation of PM₁₀mass concentration between monitoring sites for building layout and the horizontal and vertical distribution of PM₁₀mass concentration for different plant configuration structures are basically consistent,generally showing a low morning and evening high school to high school in the daily variation;（2）There is a significant difference in PM₁₀quality concentration between monitoring sites with different orientations in winter and summer,with the highest concentration in March throughout the year.With the increase of temperature and plant growth,the concentration continues to decrease,and the trend of growth in June and July is relatively stable.The highest difference is most significant;（3）At the seasonal level,there is a significant difference in PM₁₀concentration among monitoring sites,and the PM₁₀concentration in each monitoring site is significantly higher in winter than in summer;（4）There is a significant difference in PM₁₀mass concentration between different plant configuration structures with different canopy densities in winter and summer.Among them,the monitoring sites with low canopy densities have the most significant difference compared to other sites with high canopy densities.The PM₁₀mass concentration is most affected by the structure of trees,shrubs,and grass,followed by the structure of trees,shrubs,and grass,and most of them show that the sample sites with trees,shrubs,and grass are greater than those with shrubs and shrubs,with the influence of tree and grass structures being the smallest;（5）The PM₁₀mass concentration in the study area is negatively correlated with temperature,positively correlated with relative humidity,and negatively correlated with wind speed;（6）Based on the indicator system of plant dust retention resilience,a measurement model of plant dust retention resilience was constructed,and the optimal plant configuration for plant dust retention resilience was determined to be the tree shrub grass type green space structure plant configuration.In summary,the conclusion drawn is that taking Wanxin Garden Community in Changchun City as an example,the plant landscape renovation of old residential areas reflects the resilience of plant dust retention.This maximizes the dust retention ability and controllability of plant configuration from the perspective of resilience in the limited space of old residential areas,avoiding blind configuration due to excessive pursuit of plant dust retention.This provides a theoretical basis for the optimal dust retention plant ratio in the renovation of old residential plant landscape.