中文摘要：

利用1978年MSS、1987年、1996年及2007年TM遥感影像,借助遥感和GIS技术及相关分析、主成分分析方法,对宁夏中部干旱带1978-2007年土地利用变化及驱动力进行了分析。结果表明：1978-2007年耕地、城镇用地面积快速增加,沙地面积减少了281 682hm2。草地以年均0.17%的速率不断增加,林地面积减少了近3万hm2。土地利用系统无序化程度增加,土地利用利用结构复杂性和多样性增大。人口、经济、产业结构、农业生产、投入、富裕程度、政策和自然因素是驱动研究区土地利用变化的主要因素,其中,人口作为社会经济活动的主体,对土地利用变化起着推动作用。

英文摘要：

By using data derived from the 1978 MSS image and 1987,1996,2007 Landsat TM/ETM images and with the help of GIS,the land use change in arid area of central Ningxia Hui Autonomous Region was analyzed.At the same time,the driving forces of the land use change was identified by making use of the correlation analysis and principal component.The results showed that the overall trend of land use change in arid area of central Ningxia Hui Autonomous Region was in an enlargement of the areas of cultivated land,urban land,whereas sandy land area decreased 281 682 hm2,an average annual increase rate grassland area was 0.17%,and area of forest land reduced nearly 30 000 hm2 over 30 years.The land use information entropy indicating that the degree of disorder for land use system increased,and the structure of land use became complexity and diversity.It was considered that population,economic,regional socio-economic development degree,industrial structure,agricultural production,socio-input,government policy,and natural factors are the main driving forces inducing land use change in arid area of central Ningxia Hui Autonomous Region.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.