辽宁省交通网络演变对城市腹地分化的影响研究

The impacts of traffic network evolution on the city hinterland differentiation in Liaoning province

以1985、1999和2012年为时间断面,辽宁省陆路交通网络为基础数据,对辽宁省14个地级市的生活圈、基于时间可达性城市腹地和基于场强模型的城市腹地进行划分,研究交通网络演变对不同方法计算下的城市腹地范围的影响。结果显示:1)交通网络优化使各城市之间连通度显著提高,城市生活圈范围不断扩大并呈现出明显的线路耦合性和高速铁路指向性。2)提出基于时间可达性的城市腹地划分方法,城市腹地范围同时受自身与周边城市影响在省中部城市密集区域呈现明显的空间压缩效应。3)基于场强模型的城市腹地体现了中心城市依托自身服务等级对周边城市的吸引能力,形成了沈阳-大连两大经济中心竞争城市腹地的局面,将城市根据路网发展对场强腹地的影响可分为扩张型、稳定型、收缩型和弱小型。

Taking 1985, 1999 and 2012 as the time section and the road transportation network in Liaoning province as the basic data, we divided the living circles, the hinterlands based on the time accessibility and the hinterlands based on the field model of the 14 cities in Liaoning province to study the influence of the evolution of traffic network on the city hinterland in different calculation methods. The results showed that： 1 ） The optimiza- tion of transportation network made the connectivity of the city significantly increased and the city living circle had the obvious line coupling and high speed railway pointing. 2） The city hinterland based on the time accessibility in Liaoning province was influenced by the transportation network of itself and the surrounding cities. So it presented obviously squeezing effects in the central regional where the cities were intensive. 3 ） The city hinterland based on field model reflected the central city relying their service level to attract the surrounding cities. Then it gradually formed the situation of the Shenyang - Dalian two major economic centers competing urban hinterlands. According the impact of transportation network on the field hinterland, the cities were divided into the expansion type, the stable type, the contraction type and weak small type.