利用遥感以及地理信息技术,获取并分析西安市主城区1988年、1995年及2006年三期土地覆被数据。结果表明:近20年来,西安市建设用地持续增加,2006年建设用地的面积是1988年的3.1倍,增加的用地主要来自城市周围耕地,其以每年13.68 km2的速度在减少。1988年到1995年,建设用地增加了68.65%,耕地减少了15.23%,城市为填缝式发展;1995年到2006年,建设用地增加了80.77%,耕地减少了25.6%,交通用地大面积增加,城市为向外扩张式发展。根据土地利用/覆被变化转移矩阵分析,1988年到1995年以及1995年到2006年农用地转化为建设用地的面积分别为107.99 km2以及173.23 km2。城市化驱动因子主要是政策导向以及经济发展,另外,家庭结构的变化也是主要驱动因子之一。
To better understand landscape change processes,we documented land use and land cover changes resulting from urbanization in Xi'an city,Northwest China,identified the socioeconomic factors influencing lanscape changes,and determined how the conversion of land affected the city's land management.To accomplish these objectives Geographic Information Systems(GIS) data and remote sensing information were used.Analyses indicate land use and land cover changes between 1988 and 2006 involed major transitions of land from agriculture to urban classes.Additional analyses of socioeconomic data suggest relationships between the amounts of land coverted to urban use and a number of socioeconomic factors.This study of spatial pattern and driving factors of urbanizaion in Xi'an city emphasizes the importance of understanding how Xi'an is changing,the driving factors changes,and the consequences of landscape changes so that proper management strategies can be developed to urban develoment and agricutural land protection.