快速城市化地区建设用地沿城市化梯度的扩张特征——以南昌地区为例

在利用遥感资料进行了多时段建设用地制图的基础上 ,对江西省南昌地区自 1988年以来 ,在城市化梯度上的建设用地增长过程和行为特征进行了研究。结果显示 ,研究时段内工作区内的建设用地在不同城市化指数区间的分布差异逐步增加 ,并形成了城市核心区和农村地区两个绝对量分布中心。建设用地斑块的扩张过程可以明显地分成外围增长、合并增长和独立增长 3种模式 ,其峰值分布区间分别位于城市化指数为 0 .6～ 0 .7、0 .3～ 0 .4和 <0 .2的区间 ,即上述 3种增长模式分别是城市核心区、城乡过渡带地区和农村地区的代表性建设用地增长过程。比较不同增长模式的贡献率和影响范围发现 ,外围增长模式和合并增长模式是工作区内两种主要的建设用地增长过程 ,并且对城市化指数较低的农村地区建设用地增长的贡献率亦高于该区域代表性的独立增长过程。

The expanding characteristics study of built-up land use along the urbanization gradient in quickly urbanized area:a case study of Nanchang area

Urbanization is mostly represented by the increasing of built-up area. In a region where rapid urbanization is dominated by major cities, the expansion of built-up area is a complex process including patch expanding and amalgamating, and continuos new patch emerging. The process is constrained from the development needs of a city as well as the carrying capacity of disposable land resources. It is predicted that built-up patches have significant difference in expanding among the regions with different urban...