快速城市化地区土地利用效益评价--以南京市江宁区为例

作为衡量土地利用可持续性的重要标度，土地利用效益评价是近年来国内外城市土地研究的热点之一。从社会、经济、生态与环境等四方面建立了快速城市化地区土地利用效益评价的指标体系，利用层次分析法确定各指标权重，构建各效益子系统的协调度评价模型。并对南京市江宁区2003年的土地利用效益进行了综合评价，结果表明，全区总体土地利用效益适中且基本协调，但各乡镇间土地利用效益及其协调性的区域差异显著。依据各乡镇土地利用总效益及其协调度的聚类分级，可将全区划分为土地利用高效协调区、高效基本协调区、高效不协调区、中效协调区、中效基本协调区、中效不协调区与低效基本协调区等七大土地利用效益类型区，并分析了其区域差异的空间特征。

EVALUATION OF LAND USE EFFICIENCY --A CASE STUDY OF JIANGNING COUNTY

As the indicator of land use sustainability, evaluation of land use efficiency is one of research topics on urban land use in recent years at home and abroad. In this paper,by analyzing the connotation of land use efficiency and research progress on land use efficiency evaluation, we established evaluation indicators for land use efficiency in rapid urbanizing areas from the aspects of society, economy, ecology and environment. Applying the method of AHP, we also defined the weight of each indicator. A case study in Jiangning county, Nanjing city, was carried out to analyze the features of regional spatial differentiation of land use efficiency. The results showed that the whole land use efficiency of Jiangning is moderate and coordinated, and there were significant regional difference in land use efficiency and coordinated degree between the 20 villages of Jiangning. According to the clustering of land use efficiency, the whole area was divided into 7 types of land use efficiency, i.e. land use area with high efficiency and coordinated degree, land use area with high efficiency and basic coordinated degree, land use area with high efficiency and low coordinated degree, land use area with moderate efficiency and high coordinated degree, land use area with moderate efficiency and basic coordinated degree, land use area with moderate efficiency and low coordinated degree, and land use area with low efficiency and basic coordinated degree. The key countermeasures to promote land use efficiency were also discussed.