安宁河流域生态环境脆弱性评价

发布时间：2018-01-15 20:22

本文关键词：安宁河流域生态环境脆弱性评价　出处：《成都理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：近年来,我国经济快速发展,但是发展的同时,各种环境问题频繁发生,严重阻碍了我国经济社会的可持续发展。因此,生态环境脆弱性的研究已成为当前人类社会的热门问题,并引起许多专家学者的广泛关注。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,论述了选题依据、研究意义及研究的理论和方法。结合地处我国西南山地农牧交错生态脆弱区核心地带的安宁河流域的实际情况,依据已有的生态环境脆弱性评价研究相关理论及成果,建立安宁河流域生态脆弱性评价指标体系。在RS和GIS技术支持下运用数学模型对生态环境脆弱性时空变化进行分析,实现安宁河流域生态脆弱性的评价研究,并讨论其时空分异规律。通过本文的研究分析主要获得以下成果:(1)该体系在充分考虑安宁河流域特殊的生态环境特点的前提下,懫取成因-结果脆弱性评价指标体系,综合选取包括高程、坡度、植被覆盖、土地利用、土壤类型、气温、降水、GDP和人口密度作为评价指标,运用投影寻踪模型对各项指标权重赋值,并以此为基础进行生态脆弱性评价分析,确定各个区域生态脆弱性的主导影响因子。(2)从最终获得的安宁河流域生态脆弱性评分指数来看,研究区生态脆弱性指数集中分布在微度脆弱区和轻度脆弱区,所占的比例超过了百分之六十,由此可以判断安宁河流域的生态环境处于中等水平。对各项评价因子进行对比分析表明,影响安宁河流域生态脆弱性的主要因素人类活动及社会经济情况的影响。(3)综合1993-2013这20年的统计数据,通过ArcGIS与投影寻踪模型的结合实现了对安宁河流域生态脆弱性的动态分析。发现2013年安宁河流域的生态环境相对1993年的生态环境有所好转,仍有部分地区有环境恶化的趋势。通过对安宁河流域的生态环境脆弱性进行评价以及对其环境变化的驱动力分析,可以全面的了解安宁河流域的环境状况,针对性的提出环境保护的政策措施,为该地区的环境保护和地区社会的可持续发展提供依据。
[Abstract]:In recent years, China's economy has developed rapidly, but at the same time, a variety of environmental problems occur frequently, which seriously hinder the sustainable development of our economy and society. The study of ecological environmental vulnerability has become a hot issue in human society, and has attracted the extensive attention of many experts and scholars. This paper describes the domestic and foreign research progress of ecological environmental vulnerability, and on this basis. This paper discusses the basis, significance, theory and method of the research, combined with the actual situation of the Anning River basin, which is located in the ecotone of agriculture and animal husbandry in southwest of China. According to the existing ecological vulnerability assessment theory and results. The evaluation index system of ecological vulnerability in Anning River Basin was established, and the temporal and spatial changes of ecological vulnerability were analyzed by using mathematical model supported by RS and GIS technology. To realize the evaluation of ecological vulnerability in Anning River basin. Through the research and analysis of this paper, the following results are obtained: 1) the system is based on the consideration of the special ecological environment characteristics of the Anning River Basin. Gene-outcome vulnerability evaluation index system was selected, which included elevation, slope, vegetation cover, land use, soil type, temperature, precipitation GDP and population density. Using projection pursuit model to assign the weight of each index, and based on the evaluation of ecological vulnerability analysis. Determine the dominant impact factor of each region ecological vulnerability. 2) from the final Anning River Basin ecological vulnerability score index. The ecological vulnerability index (EVI) of the study area was concentrated in the micro-fragile area and the mildly vulnerable area, and the proportion was more than 60%. It can be judged that the ecological environment of Anning River basin is in the middle level. The comparative analysis of various evaluation factors shows that. The main factors affecting ecological vulnerability in the Anning River Basin are human activities and the impact of socio-economic conditions. Through the combination of ArcGIS and projection pursuit model, the dynamic analysis of ecological fragility of Anning River basin is realized. It is found that the ecological environment of Anning River basin in 2013 is better than that of 1993. Turn. There is still a trend of environmental deterioration in some areas. Through the assessment of the ecological vulnerability of the Anning River basin and the analysis of the driving force of its environmental change, we can fully understand the environmental situation of the Anning River basin. The policies and measures of environmental protection are put forward in order to provide the basis for the environmental protection in this area and the sustainable development of regional society.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：X826

【参考文献】