摘要
基于信息熵的基本原理,利用1996-2008年长株潭区域各县(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。结果表明:从整体上看,耕地、园地、未利用地面积所占比例呈递减趋势,居民点及工矿用地、交通用地所占比例呈递增趋势。土地利用结构信息熵在1996-2008年期间呈先上升后下降再上升的波浪式趋势变化。通过对土地利用结构和农业用地内部结构的分析可知:林地、果园、桑园、交通用地所占比例的高低是影响研究区域土地利用结构信息熵的主要因素。各县(市、区)土地利用结构的信息熵呈现出较大的时空差异。
In the principle of the information entropy, the dynamical changes and temporal-spatial variations on the land use structures for the city group are analyzed by means of their land use data and the corresponding economical resources. These results shows： in principle, the proportions of farmland, garden, water and unused land are decreasing, whereas the areas of settlement sites and mining land, traffic land rapidly enhance. The information entropy of land use structures at first increases and then decreases, until eventually and continuously increases during the research period from the year of 1996 to 2008. Based on the analysis of the land use structures and internal structure of agricultural land, the proportions of woodland, orchard garden, mulberry field, traffic land are found to be the important factors that affect the information entropy of the land use structures. The temporal and spatial diversities are evidently observed in the information entropy of counties.
出处
《农业现代化研究》
CSCD
北大核心
2013年第1期72-76,共5页
Research of Agricultural Modernization
基金
湖南省科技厅科技计划项目“基于RS和GIS的长株潭区域土地利用覆被变化及其生态环境效应研究”(编号:2011SK3203)
长沙环境保护职业技术学院科研课题“长株潭城市群生态安全评价方法与预测模型研究”(编号:10KY002)
关键词
信息熵
土地利用结构
长株潭区域
information entropy
land use structure
the City Group of Changsha-Zhuzhou-Xiangtan
