摘要
基于TM卫星遥感数据,对长江下游地区1988～1998年10年来土地利用类型的数量和时空变化特征进行了研究.为表征长江下游土地利用及其变化的时空分异特征,以县级行政区为基本空间分析单元,利用土地利用程度变化模型以及土地利用类型变化强度指数分析了长江下游近10年来的土地利用程度及其变化的区域分异特征、各土地利用类型变化强度的区域分异特征;通过计算土地利用变化类型的重要值,分析了区域土地利用变化的空间趋向性.研究中还对农田的数量变化特征、耕地流失强度的区域分异,特别是土地利用变化的区域生态环境效应等问题进行了分析和探讨.
Based on the multi-temporal remotely sensed data of TM, this research attempted to reveal the spatio-temporal trends in landuse and landcover in Lower Yangtze Region by depicting and analyzing the process and spatial heterogeneity of landuse landcover changes in the region, especially placing emphasis on the transformation modes and spatial behavior of landuse. In order to achieve the goal, the magnitude and spatial distribution of landuse transformation from the 1988 to the 1998 were analyzed by the transformation matrixes and the spatial layouts of landuse, then changes of landuse degree and associated traits in spatial distribution were targeted by establishing and applying the landuse index. Furthermore, the spatial shifting of landuse transformation intensity was studied by conceiving and using Landuse Transformation Index. As a hot topic, the loss of cultivated land and its driving force were also included in this step, and the top ten significant forms of landuse transformation were analyzed, in particular the trends in spatial transformation according to their Important Value individually.
出处
《地理学报》
EI
CSCD
北大核心
2003年第5期659-667,共9页
Acta Geographica Sinica
基金
国家重大基础科研发展项目(G2000046801)
国家自然科学基金项目~~
关键词
长江下游地区
土地利用
生态环境效应
卫星遥感
Yangtze River
landuse
cultivated land loss
regional ecological consequences
