Abstract
In order to build a healthier country, the policy of ecological civilization and improvement from sustainable development into green development should be considered, which has become an important task of urbanization development. At present, the world is faced with severe problems such as resource tightening, environmental pollution and the continuous production of a large number of carbon emissions in urban production and living, which lead a great negative impact on the healthy development of human settlement environment. This paper takes green space carbon sink as the research perspective, aiming to optimize and improve the carbon sink capacity of urban green space, reduce the negative impact of carbon emissions on cities and towns by increasing the amount of carbon sink, and then guide the low-carbon development of towns.According to the research carried out in Changxing county,Zhejiang province, China, combining with the demands of urban residents for recreation activities. This paper discusses the optimization path of carbon sink capacity of green space in parks from the two aspects of increasing the carbon sequestration area and improving the current carbon sequestration capacity, to explore the optimal path for the overall layout and interior space of the park green space and puts forward effective suggestions.The former uses GIS to extract green space and road vector information to analyze the accessibility of park green space, and reasonably increases the green space carbon sink area in combination with residents' travel needs, so as to achieve the goal of optimizing the overall layout. The latter, by establishing a model of coupling coordination degree between carbon sink capacity and recreation function of green space in parks, discusses and evaluates the carbon sink and recreation coordination of inner space of green space in parks, and proposed suggestions for improvement based on the needs of crowd activities. At last, the following conclusions are drawn: the three-level model of the overall layout of urban park green space , the fundamental influencing factors of the coordinated development of carbon sink and demand in the inner space of park green space , and the ecological space construction methods to improve the carbon sink . Effectively improve the carbon sink capacity of the park green space, so that the urban space intensive development.