长株潭地区土地利用结构信息熵时空测度与演化

［目的］探讨区域土地利用结构的时空变化，为政府制定土地利用规划提供参考。［方法］基于信息熵的基本原理，利用2002—2014年长株潭地区各县（市、区）土地利用变更数据和相关社会经济资料，对研究区域土地利用结构的时间变化规律和空间分异特征进行了分析，并运用灰色模型进行了预测分析。［结果］（1）从整体上看，耕地、园地、林地、草地、水域及水利设施用地、其他土地所占比例呈递减趋势，城镇村及工矿用地、交通运输用地所占比例呈递增趋势。（2）土地利用结构信息熵在2002—2014年期间总体呈先下降后上升的变化趋势，从2002年的1350 3 Nat上升到了2014年的1362 3 Nat。（3）各县（市、区）土地利用结构的信息熵呈现出较大的时空差异。（4）运用灰色模型预测可知，到2026年土地利用结构信息熵出现上升趋势。［结论］当地政府必须高度重视，大力提高土地资源配置效率与集约利用水平，优化城市土地利用结构，合理布局城市用地，实现土地资源的可持续利用。

SPATIAL TEMPORAL ASSESSMENT AND EVOLUTION RESEARCH OF INFORMATION ENTROPY OF LAND USE STRUCTURES IN CHANG ZHU TAN REGION

The spatial and temporal changes in the structure of regional land use are explored in order to provide insights for the government to make land use plan. In terms of the information entropy, the dynamical temporal spatial changes in the land use structures for Chang Zhu Tan region are analyzed by utilizing the revised data of land use and the corresponding literatures related to economy, and then are predicted by the grey model. These results showed that (1) the proportions of farmland, garden, water and unused land were decreasing as a whole, whereas the areas of traffic, settlement sites and mining land were rapidly enhancing; (2) During the research period from the year of 2002 to 2014, the information entropy of land use structures at first decreases and then continuously increased from 1.3503 Nat in 2002 to 1.362 3 Nat in 2014. (3) The temporal and spatial diversities were showed in the information entropy of each counties (cities and districts). (4) The grey model predicted that up to 2026 in Chang Zhu Tan region, the information entropy of land use structures would rise. The local government should pay much attentions, improve the efficiency of land resources and intensive usefully level, rationally distribute the urban land, and realize the sustainable use of land resources.