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    基于锡尔系数的中国城市绿地建设水平区域差异实证分析

    关键词:风景园林;城市绿地;区域差异;锡尔系数;建成区绿地率

    Key words:landscape architecture; urban green space; regional difference; Theil indices; green rate of built district

    摘要:随着我国城市绿地建设的不断发展,城市绿地建设水平的区域差异问题日益凸显。选取建成区绿地率的指标,运用锡尔系数对我国四大地区及其所属的省、市、自治区进行城市绿地建设水平的总体差异和构成分解,实证分析表明:我国城市绿地具有非均衡空间分布特征,全国总体区域相对差异明显缩小;城市绿地建设水平总体差异主要是由地区内差异引起,地区间差异对总体差异的贡献度在逐渐提高;在四大地区内省际差异中,东部省际差异对全国总体差异影响最大,西部影响较大,中部影响较小,东北影响最小;东部省际差异呈大幅下降趋势,西部省际差异一直保持在较高水平,中部、东北省际城市绿地建设水平发展均衡,且变动幅度也小,均呈现降低的趋势。分析认为上述区域差异及演变是由建成区规模变化、经济发展水平、人口、政策、自然地理和资源条件等因素综合作用造成的。

    Abstract:With the continuous development of urban green space construction in China, the regional differences of the urban green space construction level are increasingly prominent. The exploration of the theory of promoting balanced development of Chinese urban green space construction is of great significance for economic and social sustainable development. This paper selects the green rate index and uses Theil indices to analyze the overall difference and decomposition of urban green space construction in China's four major areas and their related provinces, cities and autonomous regions. The result shows: the distribution of Chinese urban green space is out of balance, while the national relative difference, the province as a unit, has been greatly narrowed. Differences within areas are far greater than those between areas, and internal gaps are the main reason which causes the overall differences, though the influence from the differences between areas is increasingly apparent. In the differences within China's four major areas, the gaps of the east area have the biggest influence on the overall differences, the second is the west area, the third is the middle area and the last is the northeast area. The differences between provinces within the east area have been falling sharply over a long period of time. The differences within the west area has been remaining at a high level. The differences within the middle and northeast area are smaller than others, and both of them are continuously decreasing. The analysis shows that the regional differences and evolution are the comprehensive result of elements like the change of construction area, the level of economic development, population, policy, physical geography, natural resources and so on.

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