转型期合肥社会空间分异与重构(1982—2000)

RESTRUCTURING OF SOCIO-SPATIAL DIFFERENTIATION IN HEFEI DURING THE TRANSITION PERIOD:1982—2000

本文利用人口普查数据,以街区尺度为研究单元,以arc GIS为技术支撑,运用空间隔离指数和信息熵模型,对转型期1982—2000年中部城市合肥社会空间分异与重构进行了探讨。结果表明:1转型期合肥城市社会空间分异与重构显著,呈以老城区为中心的同心圈状空间分布特征;2隔离指数值的变化表明,18年间合肥城市内部空间隔离程度显著减弱,混居性逐渐增强;3信息熵值变化表明,18年间合肥社会空间进行了幅度较小的有序重构。最后,对合肥社会空间分异与重构的机制进行了探讨。

With the rapid delevopment of economy in China since the reform and opening up,the prosess of socio-spatial restructure of the city is speeded up.The 18 years from 1982 to 2000 are very important periods for China to make the transition from a planned economy to a market economy, therefore, the study on the transformation of urban socio-spatial structure cannot ignore this important stage. The paper discusses the urban restructuring and differentiation of socio-spatial structure of Hefei between 1982 and 2000 based on the data of the third census in 2000,the fourth census in 1990 and the fifth census of Hefei in 2000, supported by the arc GIS, and the information entropy and index of dissimilarity are used to analyze the characteristics of socio-spatial differentiation in Hefei Area during the transition period from 1982 to 2000. The conclusions can be summarized as the following： 1）The socio-spatial differentiation and reconstruction of Hefei Area during the transition period is very apparent, the range of 11 km from the old city center is distributed in the pattern of concentric zone, and the 1.5km and 1.5-5km are very typical. 2）The authors find out that the average spatial segregation index fell from 0.359 in 1982 to 0.216 in 2000 in Hefei Area, which shows that the degree of isolation of urban interior space reduced significantly, and the mixed residences increased gradually.3） The information entropy values fell from 3.167 in 1982 to3.135 in 2000 in Hefei Area, which indicates that the socio-spatial reconstruction process of Hefei Area is relatively small but orderly. Finally, the authors explore the socio-spatial differentiation and reconstruction of Hefei Area from the history of urban development, urban planning, the drive of market economy and so on.