随着近年来建设海峡西岸经济区上升为国家战略,该区域城市的发展倍受关注。本文采用场强模型测算了2007年海西区20个地级及以上城市影响力,划分3个城市群强影响圈层。通过场强与等高线的叠加分析,发现900m以上的高大山脉对城市影响力的削减明显,并造成了3个强影响圈的割据分布。进一步依据场强取大原则划分腹地范围,从腹地与行政区的空间关系、腹地之间的空间关系两个层面探讨了城市腹地的空间格局。综合实力最强的厦门、福州、温州、汕头4个城市在周边行政区内拥有较大面积的腹地,能够发挥一定的辐射带动作用,但在江西内陆地区均没有涉及;各城市腹地既存在包含、半包含的紧密关系,也存在与主体隔离的小集团和孤立区。总体来看,海西区对接长三角、珠三角的联系通道较为清晰,但仍需经历一定时期的发展才能在沿海—内陆纵深的城市腹地连接上取得进展。

The Economic Zone on the Western Coast of the Taiwan Straits has attracted much attention since the Central Government endorsed its construction and set it as a part of the national strategy. Regional development will depend on central cities and their hinterlands which supply resources for the economic activities of cities, so the reasonable hinterland delimitation and analysis of spatial pattern can not only present an approach for studies on urban economic region, but also provide the basis for regional decision. Based on field-strength model, the paper calculates the urban influence of 20 cities at prefecture level or above in the economic zone in 2007, identifies three strong influence circles of urban agglomeration, and finds out that the big mountains above 900 meters greatly weaken urban influence according to the overlay analysis of urban field-strength and contour line. Furthermore, this paper delimits urban hinterlands in accordance with the principle of "maximal field-strength choice". Then, the spatial pattern of urban hinterlands is discussed in two perspectives. One is the spatial relationship between urban hinterlands and administrative districts, and the other is the spatial relationship between different urban hinterlands. The result shows that Xiamen and Fuzhou in Fujian province, Wenzhou in Zhejiang province and Shantou in Guangdong province occupy much larger hinterland area in surrounding administrative districts due to their higher synthetic strength compared with other cities, so they can play a radiating and leading role in these regions. However, all of the four cities do not cover any inland region in Jiangxi province. At present, there is close relationship between urban hinterlands such as inclusion or semi-inclusion. Meanwhile, the small group and the isolated urban hinterland, geographically apart from the main part, can also be found. Generally speaking, the economic zone has a clear channel to connect the Yangtze River Delta and the Pearl River Delta, but it still needs some time to make achievement in coastal-inland urban hinterland integrity.