黄河三角洲生态环境脆弱性分析

以地处黄河口的垦利县为例。以1987年和2000年两期遥感影像为基本信息源提取景观空间结构信息。利用景观类型空间结构信息破碎度、分雏数、分离度和景观类型的敏感度、适宜度构建了景观类型脆弱度指数CEVI和生态环境脆弱度指数EVI；用连续覆盖全区的格网进行空间系统采样，使脆弱指数空间化，采用统计学方法对区域生态环境脆弱度插值生成了区域生态环境脆弱度分布图；研究区未利用地和盐荒地景观最脆弱。比较1987和2000年景观类型的脆弱度，旱田、水田、盐荒地和未利用地的CEVI指数减少，林草地、建设用地和水域景观类型的CEVI呈增长趋势；区域生态环境脆弱度的空间格局及其动态变化与黄河河道和海岸线成高度相关。黄河和海洋是生态环境脆弱度空间格局的主导控制因素。

Analysis of rgional evironmental vulnerability In Yellow River Delta

In this paper, Kenli County in the Yellow River Delta was selected for a case study, two landscape maps of 1987 and 2000 withremote sensing interpretation were used as main data source. Based on fragmentation, fractal, isolation, sensitivity and suitability indexes, theenvironmental vulnerability index at class level was constructed. The system sampling method was used to make it a spatial variable, andordinary kriging were conducted to explore the spatial characteristics and the distribution of environmental vulnerability degree of landscapein the study area. The results indicated: unutilization land and saline land are the most vulnerable; the CEVI of wood- grass land, constructionland and water demonstrate the growth trend; the EVI distribution of 2000 is more homogeneous than 1987; the Yellow River and the sea arethe main driving factors in the forming of the spatial pattern and its change of EVI.