武汉对外经济联系腹地变动与都市圈范围的界定

近55年来,武汉对外经济联系的影响范围不断发生变化,受自身经济发展水平、对外经济联系程度、周围城市空间竞争影响明显。构建经济联系量模型,揭示出武汉市对外经济联系作用明显加强;存在主要联系方向,表现出较强的时间惯性;地域空间分布上受距离衰减律作用呈圈层结构分异,以武汉为中心形成3个等级圈层。运用断开点公式,揭示出武汉市经济辐射空间受到周边大城市不同程度的空间竞争挤压,腹地范围逐渐减小。依据都市圈层阶结构、区划完整、动态发展、区域平衡等原则,综合中心城市实力、区域发展背景、空间要素与流量等因子,通过构建经济联系强度模型,结合空间流量实证算法,界定武汉都市圈域范围:核心圈层("1 8"都市圈)、外围圈层(湖北、河南、湖南、江西、安徽部分相邻县市)。

Changing of Hinterland on Economic Linkages and Scope of Wuhan Metropolitan Area

In the last 55 years,because of the level of economic development,external economic linkages,spatial competitions with surrounding cities,the impact of external economic linkages of Wuhan City changed constantly.The model on economic linkages revealed several characteristics:the external economic linkages was significantly strengthened;the economic linkages with neighboring cities were increasingly closed and showed strong time inertia;affected by the geographical distance attenuation rule,the spatial distributions take Wuhan City as the center surrounded by three layers.By using breakpoint formula,this article revealed that the economic radiation space of Wuhan City was extruded by surrounding cities,and the hinterland was gradually smaller.According to the principles of the layer structure,zoning integrity,dynamic development and regional balance,and the factors of integrated strength of center cities,the background of regional development,spatial elements and flow,this article defined the area of Wuhan metropolitan area by using the strength model of economic linkages and the empirical algorithm combining with spatial flow.The area was that: the core layer(1 8 cities cycle),the external layer(surrounding provinces and cities,e.g.Hubei,Henan,Hunan,Jiangxi,Anhui).