The urban flow based research on the development of economic zone along the Yellow River in Ningxia

By using of city intensity flow model,the strength of the city's urban flow is estimated in economic zone along the Yellow River of Ningxia,elements movement between the various cities are identified in economic zone,and it is found that there is smaller radiation force in each city,factor mobility is not frequent,urban flow in financial sector and wholesale and retail services are the largest branches of trade in economic zone along the Yellow River of Ningxia.According to the size of the cities urban flow,classifies the grades,Yinchuan City's center position is determined,the second level cities are Shizuishan,Wuzhong,Zhongwei and Pingluo,Yongning,Helan,Lingwu and Qingtongxia are the third level.Finally,according to the situation,development proposals are brought forward which is about traffic network construction,industry group development,tourism development and so on.