The Spatial Pattern And Service Function Of Urban Green Space In Guangzhou

This study takes Guangzhou city green space as the research object,through the 3S technology and the outdoor field observation survey method,discusses the urban green space pattern fragmentation,the patch size and the balanced characteristic,and to quantify the cooling and humidification,dust net gas and other ecological service function characteristics of green space;at the same time,combined with the questionnaire survey and field observation,the residents of the urban green space,the awareness of environmental improvement,and improve the willingness to pay and improve the social and cultural services and other social and cultural services.The purpose is to provide scientific basis for the future urban planning,the efficient management of the government and the construction of green space science.The main conclusions are as follows:(1)In 1979~2014,Guangzhou city green space ratio of fluctuation(increasing reducing and increasing then decreased)the change characteristics of the spatial pattern of more fragmented and complicated,with small and ultra small patches dominated fragmentation pattern.The percentage of the green pattern equilibrium level is the "W" curve,which is consistent with the distribution of the four polynomial functions.Since 2000,the spatial pattern of green space has the characteristic of polarization,and the regional difference is obvious(e.g.Panyu,Nansha and central city zone).(2)The larger the area of green space in the city,the better the cooling and humidification effect(such as Baiyun Mountain).Among them,at noon(12:00~13:00pm)the maximum cooling rate,the morning(8:00~10:00am)humidity range is the biggest,the morning(6:00~10:00am)dust gas purifying effect is obvious.The ecological service functions of different green space types are obviously different,The cooling effect: trees?2×grass?4×shrub;humidifying effect: trees?2×shrub?4×grass,grassland types are sensitive to fluctuations of dust.(3)Most of the residents of Guangzhou city green impression better,and realize the importance of green space for improving the quality of the environment.By correlation and regression analysis,the cognitive characteristics of different typical green park residents were significantly different,and were related to the social and economic background and personal characteristics,such as the age,the monthly income level was significantly positive correlation.Conditional value method to assess residents' willingness to pay for green space environment improvement is still in wait-and-see stage,willingness to pay is related to the degree of education,income levels and the degree of easy access to green space and other factors.Different types of urban green parks have their own suggestions for improvement,with the characteristics of targeted and constructive.Analysis on the characteristics of green space in Guangzhou city from two aspects of "pattern and function".The conclusions of the study will help the government to understand what factors affect the attitudes of residents towards green space and the actual demand.At the same time,it will provide a scientific basis for the rational planning of the city,the layout of the green space,the efficient management of the government and the sustainable development of the city.