生态环境脆弱性评价 资源环境与城乡规划管理 毕业论文.doc

阳曲县生态环境脆弱性评价研究 摘 要 本文阐述了生态环境脆弱性的国内外研究进展，并在此基础上，论述了选题的依据、研究意义及研究的理论与方法。结合典型农矿交错城市山西省阳曲县的实际情况，重点就是对阳曲县的生态环境敏感性、生态弹性、生态压力进行评价，然后对阳曲县的生态环境脆弱性进行综合评价，然后根据其实际情况提出改良措施。 首先，根据研究区生态环境的土壤特征对阳曲县的土壤侵蚀敏感性作出评价，并画出土壤敏感性分布图；其次，根据生物情况评价其生境敏感性并作生境敏感性分布图。然后对土壤盐碱化做出评价，并作出土壤盐碱化敏感性分布图；最后，由土壤敏感性、生境敏感性、土壤盐碱化敏感性对生态环境敏感性作出综合评价，得出生态环境敏感性分布图。 运用干燥度指数、土地覆被和初级生产力进行生态弹性评价，并作出生态弹性分级图。 选用人口密度指数、贫困指数和人类干扰度作为评价因子，运用加权指数法对生态压力进行综合评价，并作出生态压力分级图。 最终，利用ArcGIS空间分析功能将生态环境敏感性、生态压力、生态弹性分布图进行叠加，生成阳曲县生态环境脆弱性综合分级图，并对结果进行分析。 关键词：生态环境脆弱性、生态环境敏感性、生态弹性、生态压力、 ????? Study on Assessment of Eco-environment Fragility in Yangqu country Asbtract This paper describes the vulnerability of the ecological environment at home and abroad on progress and on this basis, gives the topics to study and the significance of research ,with the theory and method. According to the actual situation of Mine staggered with typical agricultural city in Shanxi Province Yangqu County, the focus is to evaluate the sensitivity of ecological environment, ecological flexibility, the ecological pressure on Yangqu County, and then make a comprehensive evaluation on the fragile ecological environment, and improved according to its actual situation . Firstly,in view of the soil characteristics in the eco-environment in the researching area ,we evaluated the Soil Erosion sensitive in Yangqu county and draw the map of the Soil Erosion sensitive. Secondly, in view of the biological situation in the eco-environment in the researching area ,we assessed the habitat sensitive in Yangqu county and draw the map of the habitat sensitive. Thirdly, in view of the Soil Salinization sensitive ,we evaluated the Soil Salinization sensitive in Yangqu county and draw the map of the Soil Salinization.At last,in view of Soil Erosion sensitive、habitat sensitive、Soil Salinization sensitive,I assessed the eco-enviornment sensitive comprehensively and draw the classification map of eco-enviornment sensitive. Utilizing aridity index 、Land Cover and primary productivity to