株洲市城市扩展及其驱动力分析
2018-03-17罗春
罗春
摘 要 本文以湖南省株洲市区作为研究区,选取1999、2006、2009和2016年的Landsat遥感影像,利用IBI建筑指数分别提取了4个年份的建筑用地,在ARCGIS中对城市的建成区面积及扩展方向进行分析。结果表明,1999-2016年间株洲市面积净增74.94 km2,净增面积为1999年的114%;城市扩展方向,1999-2006年间主要为西北和东南,2006-2009年间主要为东南,2009-2016年间主要为西南和东北。运用SPSS对株洲城市扩展的驱动因素进行分析,结果表明,株洲的城市空间的扩展是各种因素和机制的综合叠加,其中人口、经济、交通、政府策略和规划均对株洲城市扩展方向产生了一定的引导作用。
关键词 城市扩展;驱动力;IBI指数;株洲
中图分类号:P237 文献标识码:A
Abstract: Four Landsat time-series images for 1999, 2006, 2009 and 2013 of Zhuzhou city have been used to study the urban expansion of Zhuzhou urban area with the assistance of remote sensing and GIS technology. The index-based built-up index (IBI) was used to extract urban build-up land information of Zhuzhou from the four images. The results indicated that during the 17-year study period, the urban built-up area of Zhuzhou had a net increase of 74.94km2, which was 114% more than the area in 1999. The main directions of urban expansion are different in different stages ,the expansion direction is northwest and southeast in 1999-2006; the direction of expansion is mainly southeast in 2006-2009;the expansion direction is mainly southwest and northeast in 2009-2016. Use SPSS to analyze the driving factors of Zhuzhou city expansion, the results shows that combined effect of various factors and mechanisms has led to the expansion of urban space, including population, economy, traffic and government strategy should pay attention to the intelligent use of urban land.
Keywords: urban expansion; driving force data; IBI; Zhuzhou city
0 引言
城市化進程的快速发展,城市人口迅速增加,必然引起城市建设用地不断向外扩展,城市建设用地扩张与城市空间形态演变,逐渐引起了国内外学者以及政府部门的高度重视[1]。1970年Lee等[2]提出了定量测度城市空间形态的方法。2003年Wilson等[3]提出了填充式、孤岛式、蔓延式、扩展式和分支式5种扩展模式。徐涵秋[4]利用IBI指数提取了近30年福州的城市建成区边界。刘盛和[5]总结了历史形态、区位经济、决策行为、政治经济学等4种城市扩展模式。朱锡金[6]根据8种城市空间扩展归纳出匀质分布、蛛网、海星状、群体、带状5大城市扩展形态。株洲处于“3+5长株潭”城市群建设的核心之一,地处湖南乃至全国的重工业基地和交通心脏地带。本文以湖南省株洲市为研究对象,采用RS和GIS技术对株洲实行动态监测,研究株洲市城市空间扩展及驱动因素进行分析的方法,对研究“长株潭城市群”的扩展及发展提供借鉴参考。……
