Based On Carrying Capacity To Research Service Radius Of City Green Spaces In Qingdao

As an important part of the urban natural ecosystem,the urban park green space has an important ecological service function.Based on the image data,road information and demographic data of the main urban area of Qingdao,we use GIS software to draw basic information database,such as park green space and water body.Through the establishment of the vector database with the road network and park entrance as the core,the leisure recreation service radius of urban park green space is analyzed.Based on the field survey data,through the specific calculation formula of PSR model,the four aspects of recreation environment carrying capacity of urban park green space,such as ecological carrying capacity,space carrying capacity,facilities carrying capacity and social carrying capacity,were estimated respectively.Finally,combined with the city park service radius and recreation environment carrying capacity,and the status of topographic and geomorphic conditions in different regions of the city.Suggestions for planning and layout of park green space are put forward.So as to optimize the layout of the park green space and realize the shrewd growth of the urban park green spaceThe main results are as follows:(1)The comprehensive service radius of urban green space is closely related to the ecological environment service value of park green space,the traffic resistance around park green space,and the effective disaster prevention area of park green space.In the future process of "ecological restoration and urban renovation",we can consider comprehensively from many aspects,so that the distribution radius of urban park green space will cover the city.(2)The service function of urban park green space mainly includes three types:ecosystem service function,recreational and recreational service function,earthquake prevention and disaster reduction service function,and the bearing capacity of different nature parks is different.The estimation results for recreation environment carrying capacity of the sample urban park green space: Zhongshan Park >Chengyang Century Park >Northridge Forest Park.(3)The leisure recreation service radius of the built-up area in Qingdao has a larger distribution area,mainly around the park green space,showing the zigzag distribution along the main urban roads,basically meeting the residents’ leisure and recreation requirements.However,due to the uneven distribution of park green space in some areas,the distance between parks is large and small,and there is a phenomenon of overlap in the service areas.In some areas,because of the lack of park green space,there is a service blind area.(4)The total area of service in the park green space in the Qingdao built-up area is 345.82 hm2,which accounts for 23.51% of the urban land area in Qingdao.The estimated carrying capacity of the park green space in Qingdao is 1968 people / day/hm2,and the daily average service population in Qingdao is about 422549 people,accounting for 15.11% of the total population of Qingdao in 2012.(5)The future "urban double repair" of Qingdao can relying on the "Green Mountain,Green Island,Blue Bay" to establish a complete and continuous urban green space system.Constructing the network green space system of "two ring,three belt and multi garden" by balancing the layout of the space of urban green space and building the pocket park.