近30年来苏锡常城市增长形态过程与聚散规律
作者简介:刘登娥(1986-),女,山东济南人,硕士,主要从事城市生态与城市土地利用研究。E-mail:lde1986@126.com
收稿日期: 2011-01-20
要求修回日期: 2011-06-01
网络出版日期: 2012-01-20
基金资助
中国科学院知识创新重要方向项目(KZCX2-EW-315、KZCX2-YW-339)资助
Diffusion and Aggregate Process of Urban Pattern in Suzhou, Wuxi and Changzhou cities over the Recent 30 Years
Received date: 2011-01-20
Request revised date: 2011-06-01
Online published: 2012-01-20
Copyright
基于苏锡常地区多时相遥感数据,采用缓冲区分析方法和象限分位分析方法,并结合景观格局指数,定量比较苏州、无锡、常州城市建设用地近30 a来扩展过程,研究城市空间分散-集中的规律性,揭示城市增长空间模式特征。结果表明:1979~2006年间苏锡常城镇用地面积扩展巨大,3市扩展强度指数随圈层半径变化轨迹高度一致,扩展强度峰值约10 a向外推移2 km;苏锡常城镇扩展形态均呈分散-集中交替变化,但研究中未观测到完整周期;城市外部轮廊变化差异明显,以开发区为代表的政府干预行为主导城市扩展方向。苏州城市用地扩展主要集中在东片工业园区和南部城区,无锡城市用地各向扩展相对均衡,常州城市用地扩展主要集中在北部高新技术产业区及城东工业区。
刘登娥 , 陈爽 . 近30年来苏锡常城市增长形态过程与聚散规律[J]. 地理科学, 2012 , 32(1) : 47 -54 . DOI: 10.13249/j.cnki.sgs.2012.01.47
The authors performed a quantitative study on characteristics of urban expansion in the Suzhou, Wuxi and Changzhou cities (SWC) by means of quadrant analysis and buffer analysis with Landsat MSS/TM/ETM images acquired in 1979, 1991, 2001and 2006. The results indicated that the spatial pattern of urban growth behaved certain regularity in the last 30 years. Expansion intensity index of the three cities showed a highly coherence with circle radius, and the peak of expansion intensity moved gradually from the inside out with time. Combined with experimental analysis for major growth axis, it is suggested that SWC region might present incomplete filling and axial development. The expansion pattern exhibited an alternating process that the complete cycle of diffusion-aggregate-diffusion was not observed in the whole city in 1976-2006. It was also found that urban expansion intensity index was quite different in different directions at different time. Various development zones which were initiated and located by the government played an important role in driving new urban growth. In Suzhou city, the eastern industrial park and southern districts lead the whole expansion process. In Wuxi, the expansion of all directions was relatively balanced.owing to the private economy development. In contrast, the urban expansion of Changzhou showed a multi-polarization trend which flocked to northern high-tech industrial zones and eastern industrial zones. A number of alternating development axes emerged as a result of the top-to-bottom control on urban development in the city.
Table 1 The population, area and construction land of Suzhou, Wuxi and Changzhou cities表1 苏州、无锡、常州市区基本情况及建设用地增长 |
年份 | 苏州 | 无锡 | 常州 | |
---|---|---|---|---|
总人口(万人) | 2008年 | 238.21 | 237.42 | 225.87 |
土地面积(km2) | 2008年 | 1650 | 1623 | 1872 |
建设用地面积(km2) | 1979年 | 36.40 | 35.47 | 27.51 |
1991年 | 76.67 | 109.42 | 92.94 | |
2001年 | 198.80 | 205.63 | 192.43 | |
2006年 | 543.61 | 430.43 | 420.59 |
Fig. 1 Urban expansion,quadrants and buffers of Suzhou,Wuxi and Changzhou cities in 1979-2006图1 1979~2006年研究区城市建设用地扩展及象限和缓冲带划分 |
Fig. 2 The distance decay trends of urban expansion intensity index in Suzhou, Wuxi and Changzhou cities in 1979-2006图2 1979~2006年苏州、无锡、常州城镇扩展强度指数的距离衰减曲线 |
Fig. 3 The spatial differentiation of urban land expansion in Suzhou, Wuxi and Changzhou cities in 1979-2006图3 1979~2006年苏州、无锡和常州城镇用地扩展空间分异 |
Table 2 The changes of major growth direction in Suzhou, Wuxi and Changzhou cities in 1979-2006表2 1979~2006年苏、锡、常城市主要增长方向 |
城市 | 时间 | 象限 | |||||||
---|---|---|---|---|---|---|---|---|---|
I | II | III | IV | V | VI | VII | VIII | ||
苏州 | 1979~1991年 | + | +++ | ||||||
1991~2001年 | +++ | + | |||||||
2001~2006年 | ++ | + | + | + | |||||
无锡 | 1979~1991年 | + | + | + | ++ | ||||
1991~2001年 | + | ++ | + | + | |||||
2001~2006年 | + | ++ | + | + | |||||
常州 | 1979~1991年 | + | + | +++ | |||||
1991~2001年 | + | +++ | + | ||||||
2001~2006年 | ++ | + | ++ |
注:+扩展强度高于该市同期8个象限的平均值;++扩展强度高于平均值1个标准差;+++扩展强度高于平均值2个标准差。 |
Fig.4 Changes of urban land landscape indices of Suzhou, Wuxi and Changzhou cities in 1979-2006图4 1979~2006年苏锡常市区城镇用地景观指数变化 |
Table 3 Changes of urban landscape indices in major growth axes of Suzhou, Wuxi and Changzhou cities before and after 2001表3 苏锡常城市主要增长轴用地格局指数2001年前后变化 |
RMPS | PD | LSI | |
---|---|---|---|
苏州Ⅰ | ↓,↑ | ↑,↓ | ↑,↑ |
苏州Ⅶ | ↓,↑ | ↑,↓ | ↑,↓ |
无锡Ⅲ | ↗↘,↑ | ↘↗,↓ | ↑,↓ |
无锡Ⅶ | ↓,↓ | ↑,↑ | ↑,↓ |
常州Ⅱ | ↘↗,↓ | ↗↘,↑ | ↑,↓ |
常州Ⅷ | ↓,↑ | ↑,- | ↑,↓ |
注:↓,↑表示2001年前为下降,2001年后为上升趋势;↗↘,↑表示2001年前为先上后下波动变化,2001年后上升趋势。 |
The authors have declared that no competing interests exist.
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