江苏省土地利用变化及其驱动机理研究

基于土地利用系统综合研究,采用解析方法将土地利用系统分解为自然子系统、经济子系统和社会子系统,对江苏省土地利用变化过程与格局进行分析。研究表明,耕地资源总量呈递减趋势,但粮食生产能力呈递增趋势,并表现出明显的地区分异规律;虽然经济总量也呈递增趋势,但信息熵指数表明区域分异明显;最后提出区域土地利用变化的“多层推—拉驱动”模型。

Land Use Change and Its Driving Mechanism in Jiangsu Province

Land use and land cover changes(LUCC) have broad impacts on the global environmental changes,and LUCC can be considered as the most important and obvious carrier of the relics left on the world by global changes.There is an increasing inconsistency between the accommodation and requirement of land resource in the accelerating period of urbanization in China.Changes in land use result from the complex interaction of factors including nature,society,policy,management,economics,culture,human behavior,and environment.The objective of this article is to detect the changes and driving mechanism of land use change.Based on the system theory,the processes and pattern of land use change are detected using analytical methodology in Jiangsu Province.The results show as follows.Firstly,the areas of cultivated land are obvious reduction and subsequent total grain production increases.But the regional heterogeneity characteristics are universal.Secondly,the total amount of GDP shows steady increase tendency,whereas the information entropy values change at different areas.Thirdly,there are crisis of food and cultivated land security.Finally,the multi-level push-pull conceptual driving model elucidating the regional land use changes is also worked out.