基于GIS与RS的流溪河流域景观格局动态变化分析

Landscape Pattern and Its Dynamic Changes in Liuxi Basin Based on GIS and RS Technique

以流溪河流域1985、1995、2005年3个不同时期遥感数据为基础,应用多种景观格局指数,对流溪河流域景观格局效应进行了分析与探索。结果表明:①研究区斑块数呈增加趋势,随着时间的推移,研究区景观破碎化程度增强,平均形状指数的变化趋势与斑块数的变化趋势总体相同。②研究区内地类景观的分布距离变小,趋于集聚,受外界条件干涉显著,且后10年受人类活动影响强度大于前10年。③耕地、林地是研究区的主要景观,同时,耕地与建设用地景观也是整个流域地类景观变化的主要驱动所在。

Abstract Based on remote sensing image data （1985, 1995, 2005） in Liuxi Basin, tlle landscape pattern change of Liuxi Basin with many landscape pattern indexes was analyzed. The results showed that：（1）The study area showed an increasing trend in the number of patches, over time, the degree of landscape fragmentation increased, the average shape index trends and trends in the overall number of plaques are the same. （2）The distribution of class landscape distance becomes smaller, tend to gather, significant interference by external conditions, and the impact of human activities after 10a stronger than before. （~）The type of farmland, woodland in the study area are main landscape, while cultivated land and construction land landscape are the main drivin~ force for whole basin landsca~.