摘要
土地利用/覆盖变化及其驱动力分析是土地利用/覆盖研究的一个主要核心内容。利用1990年、1999年和2005年和田河流域3期土地利用数据,对和田河流域1990—2005年土地利用/覆被变化进行了定量的分析研究,同时利用相关分析和主成分分析探讨了土地利用/覆被变化的驱动力。研究结果表明:在15a尺度上研究区土地利用/覆被变化总特征是耕地、林地、水域和建设用地面积增加,草地和未利用地面积减少;土地利用程度变化量为0.56%,流域土地利用处于发展时期;优势度没有发生明显的变化,未利用地一直最高。研究区土地利用/覆被变化的主要驱动力为人口因素、经济因素、富裕程度、政策因素、技术因素和水文因素等,各驱动因素以合力形式作用于土地利用/覆被使其变化,其中,人口因素在土地利用/覆被变化中起主导作用。
Analysis of driving forces on land use/cover change （LUCC） is one of the hot issues of LUCC study.In this paper,the land-use amount,annual change rate,information entropy,equilibrium degree and dominance degree in Hotan River Basin of Xinjiang were quantificationally analyzed using the data from 1990 to 2005 which was supplied by ＂Western China Enviromrntal Science and Ecology Center＂.At the same time,the driving forces of the land use/cover change were explored by making use of the correlation analysis and principal component.The main conclusions are as follows：（1） The overall trend of land use/cover change in Hotan River Basin was in an enlargement of the areas of cultivated land,woodland,building land and waters,but a reduction of meadow land and unused land at the 15-year scale.（2） The information entropy had been showing a growth trend with a very small increase over the whole period,which indicated the degree of disorder of the land use system did not substantially change,and the change of equilibrium degree was basically the same as one of information entropy.（3） At the 15-year scale,the rate of land-use degree change in Hotan River Basin was 0.56% which showed land use was in development,and moreover,the dominance degree change was not obvious with that of unused land being the highest at all times.（4） It was considered that some socio-economic and natural factors are the main driving forces inducing land use/cover change in Hotan River Basin of Xinjiang,such as population,economic,regional socio-economic development degree,government policy,science and technology,weather and hydrology and so on.More importantly,the principal component analysis showed that the impacts of human activity combining with some other conditions were the leading factors that induced dynamic change of the 1and use/cover.
出处
《中国沙漠》
CSCD
北大核心
2010年第2期326-333,共8页
Journal of Desert Research
基金
中国科学院知识创新工程重要方向项目群项目(KZCX2-YW-Q10-5-4)
新疆重大专项(200733144-4)共同资助
