Measurement of spatial interaction between counties in Shiyang river basin based on road network

The accessibility of road network plays an important role in the process of spatial interaction among cities. In the present study, the road network accessibility in Shiyang river basin is evaluated by the network analysis and spatial analysis functions of GIS. Then, based on gravity model, potential theory model and field spread model, the spatial interaction level among 5 counties was calculated, and the potential value, and the spread strength were measured. Through this study, we find that the interaction among counties, potential value and spread strength of Liangzhou zone in Shiyang river basin was stronger than that of the other counties/zones.