| This study aimed at a specific urban form and climate conditions of Zhengzhou,as Tian Xiacheng,Fei Changguoji and other 16 residential area as an example.Research the temperature difference of each district;Explore the temperature distribution in the situation of Zhengzhou city residential area;Reveals the different distance,different building height and different Sky View Factor(the Sky View Factor,SVF)and different greening coverage of residential air temperature difference,change rule,main conclusions are as follows:(1)The residential area in the autumn the highest temperature appeared at 4 PM,the lowest temperature appeared at 8:00 in the morning;The residential area in the winter the highest temperature at 14:00 PM,the lowest temperature appeared at 7:00 in the morning.Through the single factor analysis of variance,the autumn and the winter temperature has a significant difference between the residential area.Comparing temperature data between the day and night,the residential temperature change dramatically during the day,the residential temperature change is more moderate during the night,but the temperature difference value is larger.The maximum temperature difference of the four phase order is winter night(4.25 ?)>autumn night(2.54?)> winter day(2.46?)> autumn day(2.09?).Strength of air temperature change in the study area is the night greater than the day,and winter night greater than autumn night,and night and day and night temperature difference is greater than the season changes in the study area.(2)Research the Zhengzhou city green space is located in the layers of different temperature.Look from the average temperature distribution pattern,both autumn and winter,as the temperature envelops outward expansion,the average temperature is gradually reduced.Look from the temperature distribution pattern,the autumn temperature distribution pattern of extending outward from Zhengzhou city downtown,temperature increased gradually;In winter,the temperature change of the residential area,south of the whole is greater than the north area of temperature change.Look from the maximum temperature distribution pattern,the autumn maximum temperature largely residential area distribution in the first,secondtemperature gradient range;In winter,the maximum temperature large residential area distribution in the north of Zhengzhou city.From the minimum temperature distribution pattern,in the autumn the farther from the inside,the minimum temperature is smaller;Northern winter temperature minimum overall temperature minimum value is smaller.In general,in the autumn and winter seasons the farther from the temperature gradient periphery within the scope,the average temperature,maximum temperature,minimum temperature and temperature variances are diminishing.(3)Position of green space,building height,the size of the Sky View Factor and green coverage will have a significant impact to temperature changes.The autumn and winter seasons the closer distance from the central city the average temperature is lower,the highter of the building height the average temperature is highter,the greater of the SVF value the average temperature is lower,the greater the plant coverage,the average temperature of the lower.From a day on average most high temperature and lowest temperature and temperature change look:in autumn nearer the distance from the central city,the most high temperature is greater,the most lowest temperature is greater,the temperature change is greater;in winter nearer the distance from the central city,the most high temperature is smaller,the most lowest temperature is greater,the temperature change is greater.Autumn high building average the most high temperature is greater than the lower building,the winter is opposite;The autumn and winter seasons,high building on average most low temperature is greater than the multi-layer,high building temperature gradient were greater than the lower builing temperature gradient.In autumn and winter the SVF value is greater,the average daily most high temperature is greater,the greater the average the most low temperature is smaller;The order of Autumn maximum temperature gradient is SVF greater than0.5 >SVF is less than 0.3>SVF is 0.3-0.5,The order of Autumn maximum temperature gradient is SVF greater than 0.5>SVF is less than 0.4>SVF is 0.4-0.5.In autumn and winter with the increase of green coverage rate,average daily most high temperature,the most low temperature,average day and night accumulated temperature and temperature gradient is smaller gradually.And in the autumn green coverage rate is greater than 30% has obvious effect for temperature,green coverage rate is greater than 50% has extremely obvious effect for temperature.In winter,green coverage rate is greater than 30% has obvious effect for temperature,but when green coverage rate is more than 30%within the scope of the different greening coverage to thetemperature control effect is not obvious.(4)Through a comprehensive analysis of the articles we can know,within the scope of the zhengzhou city,should add green space in the central city.Increased measures may establish multi-storey residential area to reduce the air temperature;planting green vegetation to reduce SVF value to reduce air temperature;controlling green coverage rate around 30% to best reduce the air temperature. |
PDF Full Text Request