基于GIS和景观生态学的西部地区城镇建设用地扩展研究——以宝鸡市中心城区为例

The construction land spraw in Baoji based on GIS and landscape ecology construction

近些年,城镇建设用地的大规模扩张对区域土地资源承载力形成了巨大压力,并导致了大量土地资源的闲置浪费。为了实现土地资源的集约化利用,文中结合GIS和景观生态学的研究方法对宝鸡市1988～2005年中心城区城镇建设用地扩展类型进行定量识别。结果表明:1)近些年,宝鸡市中心城区城镇建设用地扩展经历了缓慢扩展期(1988～2000年)和高速扩展期(2000～2005年)两个阶段;2)在斑块类型水平上,城镇建设用地表现出较好的连通性,并且呈增强趋势;3)外延式扩展是研究期内城镇建设用地扩展的主要类型,扩展比重为外延式>填充式>跳跃式。通过研究为城市空间规划提供了详细而准确的数据,为寻求优良扩张模式奠定了一定的基础。

The large - scale expansion of construction land puts great pressure to the regional land resources ＇supporting capacity and leads to the massive land resources wasted and idled in the resent years. In order to achieve the intensive use of land resources, we mainly studied the construction land expansion patterns in the center of Baoji city from 1988 -2005 by using the methods of GIS and landscape ecology. The result showed： ①In the recent years, the expansion of construction land in the center of Baoji city mainly period（ 1988 - 2000） and the high speed expansion period （ 2000 - 2005 ） ; ② experienced the slow expansion On the patch level, construction land perform great consistency, which shows an enhancement tendency. ③The edge - expansion was the main type of the construction land expansion during the study period, and the expansion proportion were the edge - ex- pansion 〉 the infilling 〉 the spontaneous growth. This study would provide detailed and accurate data for the urban spatial planning ,and lay a foundation to seek a better exoansion tvoe.