| The demand for high quality living environment of urban residents is increasing day by day,the green space of residential area has a significant effect on improving the living environment,but there is a lack of quantitative research on the environmental impact of residential green space.The current national standards for air quality assessment indicators,only for a variety of pollutants,are the lower limit of air quality,while the upper limit of air quality-air cleanliness but no evaluation criteria.In recent years,air anion has been concerned by researchers all over the world.It is an important method to evaluate the air cleanliness by measuring the concentration of air negative ions.This paper selects the Swan Lake of Hefei city in hot summer and cold winter area of 3different types of green space as the research object,and in the open square as the control,in the summer of 2015 winter tested the air cleanliness factor: the concentration of negative air ion concentration and air ion;environmental impact factor: PM2.5 concentration,temperature,humidity,wind speed and other indexes.Analysis of the temporal and spatial distribution characteristics of 3different types of green space and control square air cleanliness factor,and the evaluation of air cleanliness,and the influence of environmental factors on the air cleanliness.As a basis for further research on the air cleanliness of residential areas,and to provide a standard and basis for evaluating and measuring the air cleanliness of residential areas.Hefei Swan Lake five surrounding residential area,selected after the rain,sunny,cloudy weather three,test the settlements in different types of green space and indoor air cleanness factor:air positive and negative ion concentration;environmental impact factor: PM2.5 concentration,wind speed,air temperature,air humidity.Summary of high-rise residential district of different types of green space and indoor negative ion concentration spatial distribution characteristics and comparative analysis of the selected for each sample point difference of air cleanliness in the region,and comparative analysis of different living area between difference of air cleanliness.The conclusion,residential area or a large area of green water phase through the formation of green space layout on the whole,for the entire residential area of internal air cleanliness improvementthan group type,dispersion free style residential area formed by the fragmentation of green space layout,to be more effective.The distribution of air cleanliness in different types of green space in residential area based on,tries to put forward the optimization design method of city high-rise residential green residential area in the East,increase the green area,rich green plant structure,point discharge effect of plants and trees huge dust,plus a certain layout of water,producing negative ions due to the effect of the wind,to other areas within the District of indoor and outdoor air cleanliness improvement.A large area of the overall layout of green or water,abandoned a small number of small areas of the scattered layout of green space.Give up a large number of general accumulation of dense tall trees practice,changed to a moderate degree of forest canopy density.The utility model can not only achieve the function of dust reduction,but also can not cause the airflow to be blocked. |
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