MEASURE AND ANALYSIS OF SPATIAL LINKAGE OF TOURISM ECONOMY OF DAY TOUR OF THE CITIES IN THE YANGTZE RIVER DELTA

The Yangtze River Delta is a rapid developing gold zone of tourism economy,therefore,it is significant to analyze the urban economic space travel links and the core tourism cities.The result shows that the strength of tourism economic linkage between cities in the Yangtze River Delta is intensifying and extending to the integration of regional tourism economy.Meanwhile,it shows distinct difference in tourism economy between cities inside the Yangtze River Delta.And it presents positive correlation with the change of the hierarchic ranks of the cities.Moreover,it has relations in the spatial linkage of tourism economy according to particular axis which presents as route and the law of this link is that decreasing with the increasing distance between cities.The authors also divide the Yangtze River Delta economic circle into small tourism economic circles according to the calculated data,which are the coastal tourism economy circle centered by Shanghai,Taihu Lake tourism economic circle centered by Suzhou,the West Lake tourism economic circle centered by Hanghzou,in order to analyze the relationship between the tourism economic circles and adjust the complementarily of different circles.So the interaction within the Yangtze River Delta economic circle will be enhanced and greater tourism scale benefit will be achieved.Therefore,the spatial structure of the Yangtze River Delta tourism system will evolve more reasonable.Also,a wide range of markets and resources will be provided for special day tour in the cities and different tourism products could be designed for different tourists' demand.Based on the analysis above,the paper discusses the influence that the tourism spatial relationship between the cities has on the Yangtze River Delta tourism system spatial structure.