Study On The Livable Environment Of Residential Areas Climate In Zhengzhou City

In the context of highly developed urban land resources,artificial changes have been made to the original natural underlying surface,and cities have gradually formed a unique environmental climate.Human intervention has led to the deterioration of urban thermal environment and air quality.The green space in cities has a certain ecological effect,which can regulate the microclimate and improve the environment.It is of great significance for improving the comfort of living environment and building a livable environment for urban residential areas.Residential land accounts for a large proportion of urban construction land,and it is particularly important to maximize the ecological benefits of the limited green space in residential areas.To explore the impact of urban green space on the temperature,humidity,and comfort of residential areas,this study takes four representative adjacent residential areas in Jinshui District,Zhengzhou City as the research objects.Through on-site observation and meteorological data analysis in spring,summer,autumn,and winter,the study compares and studies the spatiotemporal changes in temperature and humidity in these four residential areas with similar building heights but different green space conditions in different seasons;The main conclusions are as follows:(1)In terms of regional green coverage,there is a significant negative correlation between summer green coverage and temperature,and a significant positive correlation with nighttime humidity.The higher the value,the more significant the cooling and humidification effect in residential areas.Therefore,the increase in green coverage has a positive impact on the improvement of the thermal environment in residential areas;There is no significant correlation between the green coverage rate and various temperature and humidity indicators in winter.(2)Research on Living Vegetation Volume has found that there is a significant negative correlation between the increment of Living Vegetation Volume in summer and temperature and humidity indicators.The higher the Living Vegetation Volume,the lower the temperature and the higher the humidity;During the winter daytime,it shows a significant positive correlation with average temperature and a significant negative correlation with humidity;At night,there is no significant correlation with temperature,but a significant negative correlation with humidity.The larger the Living Vegetation Volume in winter,the higher the daytime temperature and the lower the nighttime humidity.(3)The correlation between building area and volume and temperature and humidity is not significant in the four seasons of spring,summer,autumn,and winter.Based on the situation,it is speculated that the correlation has not been determined because the selected residential areas in the study have similar building heights.(4)The Sky Vision Factor(SVF)shows a highly significant positive correlation and a significant negative correlation with summer temperature and humidity.The higher the SVF value,the higher the temperature,and the lower the humidity.In winter,there is no significant correlation between SVF value and temperature and humidity.(5)Using the measured data,calculate the comfort value from 6:00 to 21:00,calculate the comfort time length of each residential area,and calculate its correlation with the Living Vegetation Volume.The results show that there is a significant correlation between summer comfort time and Living Vegetation Volume.For every108% increase in Living Vegetation Volume in residential areas,the comfort time increases by about 40 minutes;There is no significant correlation between winter comfort time and buildings and green spaces.(6)The study further explored the possibility of increasing comfort time in residential areas,and the results showed that for every 10% increase in summer green coverage,the average comfort time increased by about 30 minutes.For every 10000m3 increase in Living Vegetation Volume,the average comfort time increases by about 36 minutes.There is no significant correlation between summer comfort time and factors such as building area and volume;There is no significant correlation between winter green coverage rate and Living Vegetation Volume and comfort time.(7)Research has shown that green spaces have a regulatory effect on the microclimate in residential areas,with a more significant effect in winter and summer,and the most significant effect in summer.The three-dimensional green amount in summer has a better ability to regulate microclimate than the green coverage rate.Considering the actual situation,combined with the comprehensive analysis of the results of this study case,for multi-storey residential areas in Zhengzhou City,Henan Province,when the green coverage rate is 56% and the Living Vegetation Volume is36000m3,the environmental comfort is relatively high,which has guiding significance for the construction of livable environment in residential areas.In the future planning and design of green spaces in residential areas,it is not only necessary to improve the internal green coverage of the site,but also to pay attention to the increase of Living Vegetation Volume,so that the green space can play a better role in microclimate regulation.