Research On The Accessibility Of Jinan City Ring Park

With the improvement of urban public service facilities and the improvement of residents’ material living standard,people’s demand for park green space is becoming higher and higher,not only paying attention to the quantity and quality of park green space,but also paying more attention to the convenience and fairness of entering park green space.The study of accessibility of urban park green space can reflect the rationality and fairness of park green space allocation and its service capacity.Based on the GIS network analysis method and two-step floating catchment area method,the paper analyzes the reachability of four traffic modes,namely,car shop and walking.First of all,with the help of the ArcGIS network analysis module,we set up the spatial resistance model of the travel mode(including motor vehicle,non-motor vehicle and bus)of the ring city park and set up the database of the road network.Secondly,using the improved Gauss two-step mobile search method,the walking travel mode is set 15 minutes and 30 minutes search threshold,the entrance and exit of the ring city park and the residential area are used as the supply and demand place respectively,the mobile search is twice,and the reachability of the walking travel mode of the ring city park is analyzed.Finally,the paper puts forward some strategies to enhance the reachability of the park.The conclusions are as follows:(1)There are obvious differences in the reachability of the park under the four modes of transportation.The reachability coverage areas are from large to small private cars > buses > nonmotor vehicles > walking respectively,which is also related to the average speed and traffic characteristics of each mode.On the whole,the accessibility of the four modes of transportation is gradually decreasing from the center of the park to the periphery.(2)There are also some differences in the reachable area and proportion of the three modes of transportation,private cars,non-motor vehicles and buses.The average speed of motor vehicles is fast,so the reachable area increases fastest in 0-15 minutes;the reachable coverage of buses in 45 minutes can basically cover the whole range of vehicle research,reflecting the advantages of public transport travel;and non-motor vehicles in 20-45 minutes reachable area growth faster,also reflects the advantages of non-motor vehicles,especially electric vehicles in longer distance travel.(3)When the search radius of walking travel mode was increased from 15 minutes to 30 minutes,the reachability of the park also increased significantly.The accessibility of the park is closely related to the distribution of the entrance and exit and the potential service population.In the subregion,the expansion of the search radius has led to an increase in the potential service population and a decrease in the per capita park area and per capita entrance and exit,which has led to a decrease in accessibility in the southwest of Huancheng Park compared with 15 minutes,while in the north-west,the lack of access to the park has led to lower accessibility.(4)Increasing the number of car parks and bus stops around the park is one of the most direct and effective measures to improve accessibility.The analysis shows that the accessibility of the four travel modes has been improved to varying degrees after the addition of eight entrances and exits.In addition,increasing the number of parking lots and bus stops around the park can also improve the accessibility of both private cars and buses.