基于信息熵和数据包络分析的重庆市县域土地利用结构评价

土地利用结构是国民经济结构在土地利用上的具体表现,通过土地利用结构评价可提高土地利用效益及功能。以GIS技术为平台,采用信息熵理论和数据包络分析方法,选取重庆市38个县区为研究对象,从有序性和效率两个方面分析评价了重庆市的土地利用结构状况。结果表明:重庆市各县区土地利用结构的有序度存在显著的空间差异,有序度高低与区域内用地密切相关;土地利用效率在空间上也存在明显的差异化,20个县区综合效率、技术效率、规模效率为1或接近于1,表明重庆市各县区土地利用结构相对合理,各项土地利用效率较好,土地开发利用比较有序。

Evaluation on Land Use Structure in Counties of Chongqing City Based on Information Entropy and Data Envelopment Analysis

The land use structure is a specific performance of land uses on the national economic structure, the evaluation of land use structure can improve the efficiency and function of land use. In this paper, based on GIS software, 38 counties in Chongqing City were selected as the research objects, the regulation degree and efficiency of land use structure were evaluated by using the information entropy theory and the data envelopment analysis (DEA) method. The results showed that there were significant spatial differences in the regulation degrees of land use structures in different counties of Chongqing, and the regulation degree had a close relation to the regional land use. There were significant spatial differences in the efficiencies of land uses in different counties, the values of comprehensive technical efficiencies, pure technical efficiencies and scale efficiencies of 20 counties were 1 or close to 1, which indicated that the land use structure in each county of Chongqing City was reasonable, the land use efficiency was good and the land development and utilization was orderly.