【作者】 田静；

【导师】 姚建；

【作者基本信息】 四川大学 ， 环境科学， 2004， 硕士

【摘要】 随着我国生态环境的同益恶化，区域生态经济系统的恢复与重建已引起社会各界的广泛关注和高度重视。岷江上游是四川省乃至西部地区重要的生态屏障，极度脆弱的生态环境已危及到长江流域的生态安全，并成为区域经济社会发展的主要限制性因素。开展岷江上游生态脆弱性的研究，对该区域生态环境的恢复与重建、流域可持续发展等方面具有重要的战略意义。 本文调查分析了岷江上游生态脆弱性的表现，对森林退缩、水土流失加剧、河川径流减少、干旱河谷扩张、自然灾害频繁等作了具体阐述。采用因子分析法及指标逆向测度法，对岷江上游生态脆弱性发生机制及驱动力进行研究，初步确定了影响生态脆弱性的六大驱动因子——生态背景状况、人口承载与结构、水土流失状况、土地利用与垦殖状况、产业结构水平状况、投资状况等。并在此基础上采用聚类分析的方法，得出了岷江上游地区生态脆弱性的时间演替轨迹是由低脆弱型向高脆弱型演进，但演进速度有所减缓；空间分布格局是以中部干旱河谷地区最为脆弱，且有向周围扩散趋势。并针对岷江上游地区实际情况，提出了整治与重建该区生态环境应遵循可持续发展、资源利用与产业结构调整相结合、注重人的能动性等原则；应采取退耕还林、加强水土保持、重点治理干旱河谷、控制人口增长，优化资源配制、进行统一的科学管理等措施。 论文首次采用因子分析、指标逆向测度法、聚类分析等方法对岷江上游生念脆弱性进行了较全面的分析和探讨，为该地区生态脆弱性的进一步研究、脆弱生态环境的恢复重建提供了科学依据。更多还原

【Abstract】 With the degradation of eco-environment ,the restoring and rehabilitating of regional ecological& economic system has attracted more and more attention in china, The upper reaches of the Minjiang River is one of the typical vulnerable ecotones in our country, while the eco-environment vulnerability has had serious affect on the implementation of the sustainable development strategy in this area. This article was mainly talking about the main eco-environmental problems, the formation principle and evolution pattern of vulnerable eco-environment in this region and the measure of restoring and rehabilitating. it’s important to guide the river basin’s economical development and ecological environment construction.The article includes seven portions, which content is as follows:(1) Expound the meaning ,main content of the article(2) Introduce the process in ecological vulnerability research on abroad and domestic, and conclude the intention, cause of formation and measure of ecological vulnerability. Besides pose some problem in this field.(3) Analyzing the eco-environment characteristic of upper reaches of Minjiang River from nature& economy aspect. Put forward some the main eco-environmental problems in this region.(4) Research the cause of formation of vulnerable eco-environment in upper reaches of Minjiang River. it employs method of factor analysis& target regressive measure, discusses and analyzes this regional eco-environment vulnerability driving mechanism, definites six major driving factor.(5) Based on the history evolution process of upper reaches of Minjiang River, by means of cluster analysis research this regional history evolution pattern& space distribution structure.(6) From above mentioned, it puts forward some new measurement of ecological restoring and rehabilitating of upper reaches of Minjiang River.(7) Finally, this research has been summarized.更多还原