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
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.
LIU Deng-e , CHEN Shuang . Diffusion and Aggregate Process of Urban Pattern in Suzhou, Wuxi and Changzhou cities over the Recent 30 Years[J]. SCIENTIA GEOGRAPHICA SINICA, 2012 , 32(1) : 47 -54 . DOI: 10.13249/j.cnki.sgs.2012.01.47
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.
[1] |
|
[2] |
|
[3] |
|
[4] |
|
[5] |
|
[6] |
|
[7] |
|
[8] |
|
[9] |
|
[10] |
|
[11] |
|
[12] |
|
[13] |
|
[14] |
(
|
[15] |
|
[16] |
|
[17] |
|
[18] |
|
[19] |
|
[20] |
|
[21] |
|
[22] |
|
[23] |
|
[24] |
|
[25] |
苏州市统计局. 苏州统计年鉴[M]. 北京:中国统计出版社,2008.
|
[26] |
无锡市统计局. 无锡统计年鉴[M]. 北京:中国统计出版社,2008.
|
[27] |
常州市统计局. 常州统计年鉴[M]. 北京:中国统计出版社,2008.
|
[28] |
|
[29] |
|
[30] |
|
/
〈 | 〉 |