作　　者： (关惠元）; (张国斌）;

机构地区： 兰州交通大学建筑与城市规划学院,甘肃兰州730070

出　　处： 《兰州交通大学学报》 2017年第4期93-99,共7页

摘　　要： 景观格局的时空改变对于区域气候、生态环境、人与自然地和谐发展具有极其重要的作用.基于石羊河流域2001、2006和2015年三期MODIS土地覆盖数据,运用景观格局指数和主成分分析法,研究该流域近15年景观格局时空变化及其驱动力因子.研究表明:1)2001~2015年间草地和农用地快速增长,灌木和未利用地面积急剧降低.2)斑块形状趋于简单,生态系统稳定性增强.水体、林地、农用地的破碎化程度增加,灌木、建设用地的破碎化程度降低,全流域的破碎化程度减弱.3)景观格局的改善与气候暖湿变化有关,主要驱动因子是社会经济和农业发展因素,政策是最重要的驱动因素. The temporal and spatial variation of landscape pattern has significant influence on the regional climate,ecological environment and harmonious development of human and nature. Based on MODIS land cover data of 2001,2006 and 2015 in Shiyang River Basin, the landscape pattern change and its driving force factors for nearly 15 years in this region are studied by using land- scape pattern index and principal component analysis. The study indicated following results： 1） from 2001 to 2015, grassland and agriculture area increased rapidly while shrub land and unused land decreased rapidly; 2） the fragmentation of water, forest and agriculture area in study area kept increasing while the fragmentation of shrub land and instruction area decreased, and land- scape fragmentation in the whole area decreased and patches tended to be simple,which strength- ened the stability of the river basin system;3） the improvement of landscape pattern was closely related to the change of warm and humid climate ; the main driving factors were social, economic and agricultural development factors, and the policy was one of the most important driving fac- tors.

关 键 词： 石羊河流域 景观格局 变化特征 驱动力