| Waterfront space as a natural linear open space of residents’ recreation activity,is one of the main axes of residents daily recreation activity,connected to the recreation of cross-strait relevance space nodes such as park,square,green space,the relevance space of the open space and each sector of the waterfront space as a node,and the links between nodes,together constitute the city waterfront recreational network.Although people have realized that waterfront recreation network is an important perspective to comprehensively improve the function of waterfront space,the spatial granularity is not suitable for constructing the tourism flow network at the neighborhood level when the existing research data is too rough,and waterfront recreation network is still a missing part in the study of tourism flow.In recent years,with the development of GPS technology and the rise of social networking platforms,a large number of high-precision crowdsourced trajectory data have emerged,which provide data support for the waterfront recreation network at the micro-level of the city.Taking the core area of Huangpu river in Shanghai as an example,this study constructed the waterfront recreation flow network in the core area of Huangpu river through GPS crowdsourced track data,and analyzed its network structure and node characteristics with social network analysis method.Then the spatial pattern of recreation flow is analyzed by flow control and community division.Finally,the temporal and spatial evolution of two types of recreation modes is analyzed.(1)The overall structure of the recreation network is loose and the flow distribution is uneven.A few recreation nodes and paths gather a large amount of traffic.There are several subsystems in the network,and the connection paths between these sub-systems are relatively single.The overall flow shows a trend of attenuation from the waterfront space to the related sections on both sides,forming the dual-core of "Xuhui Binjiang-World Expo" and "Lujiazui-Bund-North Bund".The proximity of nodes in the north of Nanpu Bridge is significantly stronger than that in the south,and the traffic accessibility of nodes with high proximity is also relatively high.The nodes with high mediation have three spatial characteristics: the nodes with high flow in the associated area,the nodes at the river intersection,the nodes connected with the recreation subsystem outside the associated area,and the recreation nodes near the river recreation system.(2)The core area of the Huangpu River has completed the internal connection of all the two sides.The riverside space at the northern end with the core section continues to break through,and there are two recreation paths across the river.The connection of the southern end section still needs to be strengthened.The expansion pattern of the Nanjing Road axis and Suzhou River axis has been formed in the Bund area,and the reticular expansion pattern has been formed in the World Expo Area.In the associated zone of the Lujiazui area,two new core areas have been added,with the Oriental Pearl Tower and the Yaohan Commercial circle as the core.(3)an open network can be divided into six communities,including "Nanjing road,the bund,the north bund area by Suzhou creek and presents the dual-axis reticular pattern of Nanjing Road walking street," after the expo axis,beach area through the uniaxial mesh the patterns in the expo axis,the "small Lujiazui,Shanghai shipyard area" mononuclear reticular pattern is formed by the yaohan business circle,"small Lujiazui,Shanghai shipyard" area,"after a period of an area in Suzhou creek",due to the association in the southern area in the west bank of "core" areas lack path between nodes,presents the tree structure.Through recreation paths,each community forms the combination of "Little Lujiazui--Yaohan Business District","Suzhou River--Nanjing Road--North Bund","Lujiazui--Bund--North Bund" and "Xuhui Riverside--Expo Axis".(4)The main influencing factors of waterfront recreation network spatial patterns include geographical distance and network distance,recreation space distribution pattern of related areas,road traffic facilities,function positioning of recreation nodes,and spatial form of recreation nodes.The optimization strategy of the spatial pattern is proposed: at the node level of the recreation network,give full play to the coordinating role of core nodes,enhance the expansion capacity of general nodes and edge nodes,and improve the separation pattern of isolated nodes.At the recreation community level,the network pattern is consolidated,the treelike pattern is expanded,and the connection between different sections of the community is increased through the water body of the River. |
