雅安市雨城区景观格局动态特征分析

利用雅安市雨城区1996年、2003年土地利用现状图，在ArcGIS平台下进行矢量化，生成两期土地利用现状图及属形数据，通过FRAGSTATS景观格局分析软件，计算相应的景观格局指数，用以描述研究区景观格局特征。结果表明，研究区在1996～2003年，斑块数明显增加，平均斑块面积减小，景观斑块的形状趋于复杂且不规则，表现为分维数的增加；通过景观破碎度的分析，斑块密度、边界密度呈上升趋势，斑块连接度、聚集度减小；1996年、2003年两个时段的基质景观均是林地，主要景观类型为林地、耕地；通过景观多样性、均匀度、聚集度分析，景观异质性增加。

Study on Dynamic Characteristics of Landscape Pattern in Yucheng District

Used the map current land use in 1996 and 2003 by Yucheng district, based on GIS software ArcGIS to extractland use information, applied landscape pattern analysis software, and calculated landscape pattern metric by FRAGSTATS software to describe characteristics of landscape pattern by Yucheng district. The results showed that, in the past seven years, the number of patch in creased obviously, the average area of patch decreased, and the shape of patch became complex and irregular, it displayed that the fractal Dimension Indexincreased, and by means of the analysis of the fragmentation, the patch density and edge density was increasing, Patch Cohesion Indexand Aggregation Indexwas decreasing. The landscape matrix was forest land in 1996 and 2003, and the major landscape type was forest and cultivated land, through analysis of landscape diversity, evenness and Aggregation, it showed the landscape heterogeneity increased.