城市边缘区建设用地扩张空间特征及影响因素定量研究——以南京市江宁区为例

Quantitative Study on the Spatial Characteristics of Construction Land Expansion and Its Influencing Factors in Urban Fringe Area——A Case Study of Jiangning District in Nanjing

城市边缘地区内部建设用地扩张空间特征及影响因素研究是当前城市用地空间扩展研究的薄弱环节。以南京市江宁区为例,构造城市扩张综合指数(UICI)反映城市边缘区内部建设用地扩张的空间差异,并按计算结果将各镇(街道)城市用地扩张归纳为剧变型、快变型、缓变型及相对稳定型4种类型。在建立城市用地扩张影响因素因子体系的基础上,运用主成分分析与通径分析相结合的方法,得出以下结论:推动城市边缘区建设用地扩张的因素中科技水平是决定因素,经济水平、人口状况间接影响大于直接影响;主城关联因素不可忽略。

The spatial characteristics of construction land expansion and its influencing factors in urban fringe area is a weak part of the whole study of urban land expansion. Taking Jiangning County in Nanjing as an example, this paper establishes Urbanization Integrated Characteristics Index（UICI） to reflect the spatial diversity of the inside of urban fringe area and then generalizes four styles ： exquisite changing style, fast changing style, slow changing style and relatively steady style. Based on the urban land expansion influencing system and using the methods of principle component analysis and path analysis, this paper makes the following conclusion： among all the factors that influence urban fringe area land expansion, science and technique is the determinant, economy and population have more indirect influence, and the connection with host city can not be ignored.