Quantitative Analysis of the Urban Expansion Models in Changsha-Zhuzhou-Xiangtan Metroplan Areas
Received date: 2011-06-09
Request revised date: 2012-02-10
Online published: 2012-05-20
Copyright
The urban expansion pattern is important to understand the urbanization processes. It is important to reveal and study quantitativly on urban spatial expansion models for understanding the regional urbanization process and the urban spatial planning. In this article, the changes of urban landscape from 1993 to 2006 in the core area of Changsha-Zhuzhou-Xiangtan metroplan areas are quantified using landscape expasion index (LEI). The results indicate: 1) the proportions of urban expansion area in outlying model is 22.38%, 30.26%, 13.74%, 18.68% respectively, those of in edge-expansion model are 60.60%, 52.42%, 66.83%, 63.69% and in infilling model are 17.02%, 17.32%, 19.43%, 17.63% respectively from 1993 to 2006. This shows that after a messy dispersed primary development phase, urban development is more compact and reasonable layout. 2) the urban expasion appears mainly edge-expansion model from 1993 to 2006 in Changsha-Zhuzhou-Xiangtan metroplan areas. However, there are different unban expansion models in four different periods: ① the urban expasion appears edge-expansion and outlying model from 1993 to 1996, which indcates that urbanization is in the early stage of rapid urbanization; ② the urban expasion appears mainly outlying model from 1996 to 1998, which indcates that urban development is messy and dispersion; ③ the urban expasion appears mainly edge-expansion model from 1998 to 2001. This period is the proliferation phase in the rapid development of urbanization; ④ the urban expasion appears edge-expansion and infilling model from 2001 to 2006. This period is the polymeric phase in rapid urbanization. 3) The MEI and AWMEI of Changsha-Zhuzhou-Xiangtan metroplan areas show an ascendant trend, which rises to 34.72 and 30.59 respectively. This means that urban landscape expansion tends to be more compac. 4) The urbanization level of Changsha-Zhuzhou-Xiangtan metroplan areas was 49.69% in 2006. The annual growth rate is 2.57%. A rapid development of urbanization leads to land used for construction increasing and the investment of urban construction expanding ceaselessly. Rapid development of urbanization is an important reason for urban landscape expansion. Another important reason is industrialization development,especially a quick development when Changsha-Zhuzhou-Xiangtan metroplan areas go into “Two Type” society. The proportion of secondary industry is 47%, which is 3.5% higher than the provincial average.
ZENG Yong-nian , HE Li-li , JIN Wen-ping , WU Kong-jiang , XU Yan-yan , YU Fei-fei . Quantitative Analysis of the Urban Expansion Models in Changsha-Zhuzhou-Xiangtan Metroplan Areas[J]. SCIENTIA GEOGRAPHICA SINICA, 2012 , 32(5) : 544 -549 . DOI: 10.13249/j.cnki.sgs.2012.05.544
Table 1 The patch number and proportion of three LEI peaks in four periods表1 不同的LEI值间不同时段的斑块数目及比例 |
LEI区间 | 1993~1996年 | 1996~1998年 | 1998~2001年 | 2001~2006年 | ||||
---|---|---|---|---|---|---|---|---|
斑块数 | 斑块比例(%) | 斑块数 | 斑块比例(%) | 斑块数 | 斑块比例(%) | 斑块数 | 斑块比例(%) | |
0~2 | 275 | 18.27 | 611 | 28.37 | 494 | 19.80 | 521 | 22.26 |
50~52 | 54 | 3.59 | 79 | 3.67 | 90 | 3.61 | 82 | 3.50 |
98~100 | 90 | 5.98 | 91 | 4.22 | 158 | 6.33 | 134 | 5.73 |
合计 | 419 | 27.84 | 781 | 36.26 | 742 | 29.74 | 737 | 31.49 |
Fig.1 The changes of urban expasion patch with urban landscape expansion index (LEI)图1 景观扩张指数(LEI)对应的城镇增长斑块变化 |
Fig. 2 The distribution of urban expansion landscape types in different periods图2 不同时间段内城镇景观扩张类型的空间分布 |
Fig.3 The proportion of area and patch number of three landscape expansion types in different periods图3 三种景观扩张类型在不同时间段的面积和斑块变化 |
Table 2 MEI and AWMEI in four periods表2 各个时间段的MEI和AWMEI |
时间 | 1993~1996 | 1996~1998 | 1998~2001 | 2001~2006 |
---|---|---|---|---|
MEI | 30.30 | 30.69 | 32.73 | 34.72 |
AWMEI | 25.36 | 26.63 | 30.22 | 30.59 |
The authors have declared that no competing interests exist.
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