摘要
以位于西北的河谷型城市兰州市市区为例,引入流分析和土地利用活跃度分析,基于Landsat遥感影像数据,采用土地利用变化测度模型和主成分分析方法对研究区土地利用时空动态特征及其驱动机制进行了分析。研究表明:①研究区未利用土地资源较少,后备土地资源严重不足,林地、草地、水域比例较低,存在较大生态风险;②建设用地与耕地、草地、林地之间的转移关系是土地利用转移的关键关系,决定着研究区土地利用变化特征;③土地利用变化具有阶段性,随着社会经济高速发展,城镇化的快速推进导致土地系统熵值增加,稳定性降低。
The estimation of urban land system stability is based on the reasonable arrangements of urban land-use, the optimization of land structure system, and the achievement of sustainable utilization of land resources. This paper, taking Lanzhou city, the valley-basin city in Northwest China for example, introduced flow analysis and activity analysis of land utilization, and analyzed the spatiotemporal dynamic characteristics of land utilization and its driving mechanism in research areas by the measure model of land use change and principal component analysis, based on Landsat remote sensing image data. The research shows that： （1） In the research area, less unused land resources and reserved land resources, and the lower proportion of forest land, grassland and water area have the greater ecological risk; （2） Transformable relationships among the construction land, cultivated land, grassland and forest land are key relationships of the transition of land utilization, which has determined change characteristics of land utilization in the research area; （3） The land use change shows the class character. With the rapid development of social economy, the fast promotion of urbanization has increased the entropy of land system and decreased its stability.
出处
《经济地理》
CSSCI
北大核心
2014年第4期153-158,共6页
Economic Geography
基金
国家自然科学基金项目(41261047
41201196)
关键词
土地系统稳定性
土地转移流
河谷型
兰州市
land system stability
land transition flow
River Valley
Lanzhou City
