关键词: 生态环境脆弱性, GIS技术, AHP-模糊综合评价模型, 模糊脆弱度

Abstract: Based on environmental ecology and restoration ecology, in this research we took regional and sustainable development as the guiding ideology. Then the ecological environmental vulnerability was carried on systematically, and the framework of synthetic analysis and evaluation on ecological environmental vulnerability was confirmed. Considering natural and artificial factors, the systematic evaluation index system was determined, including target layer-criterion layer-index layer. The 30m×30m grid system as a basic analysis unit was established, which broke with the traditional mode of administrative region as a basic analysis unit. Through the GIS grid technology and the multiple attribute characteristics analysis on the fuzzy comprehensive evaluation, the new technology "decomposition-synthesis method" was proposed, which was based on the geographic information system (GIS) and AHP-fuzzy comprehensive evaluation model. The weight for every evaluation index was confirmed with analytic hierarchy process (AHP) method, and the improved "fuzzy vulnerability evaluation model" was established. On the basis of the GIS technology, the classification of vulnerability was carried out, which reflected the spatial distribution of the ecological vulnerability scientifically and quantitatively, so that the result of evaluation made the natural elements with continuity, and was beneficial to the macroscopic realization and problem identification of the ecological environmental vulnerability. Meanwhile, it enriched the theories and methods of the analyses on the ecological environmental vulnerability. The established model and the technical method were used to verify the analysis for Hunyuan County, Shanxi Province. The results agree well with the actual situation of Hunyuan County, which shows that the established model and technical approach is feasible.

Key words: eco-environmental vulnerability, GIS technology, AHP-fuzzy model, fuzzy vulnerability