区域生态环境脆弱性的GIS"分解-合成"评价分析——以浑源县为例

以县域为研究对象,从影响生态环境的自然因素、人类干扰因素两个方面出发,确定了包括目标层-准则层-指标层在内的系统化评价指标体系;打破传统的以行政区域为单元分析的模式,通过GIS网格技术和模糊综合评价多属性特征分析,提出了将地理信息系统技术(GIS)和AHP-模糊综合评价模型互相融合,以网格单元进行生态环境脆弱性综合评价...

Evaluation and Analysis in the Regional Eco-environmental Vulnerability Based on GIS:Taking Hunyuan County of Shanxi Province as an Example

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.