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题名	干旱区河流植被生态风险遥感定量评估
作者	蒋良群
学位类别	硕士
答辩日期	2005
授予单位	中国科学院．中国科学院新疆生态与地理研究所．地图学与地理信息系统．
导师	陈曦，中国科学院新疆生态与地理研究所
关键词	干旱区
其他题名	Quantitative Assessment of Vegetation Ecological Risk on Continental River Basin in Arid Area By Remote Sensing
中文摘要	近年来，生态风险评估已被人们所重视。但是到目前为止，生态风险评估还没有一套完整的方法体系。本文在分析国内外生态风险研究进展的基础上，对生态风险评估的基本理论和方法作了深入的探讨。针对干旱区生态环境特点，提出本文生态风险评估的遥感定量方法。本研究以我国最大的内陆河一塔里木河的下游区段为研究区域，将遥感、地理信息系统等先进技术手段与模糊数学方法相结合，根据ERA框架和层次分析思想建立塔河下游植被的生态风险评估指标，运用模糊综合评判的方法进行塔河下游植被生态风险的遥感定量评估，在评估结果的基础上进行可视化分析，并提出生态风险的对策建议。全文共分七个部分：第一部分介绍生态风险评估的基本概念，国内外研究进展以及遥感在生态风险评估的应用；第二部分介绍了生态风险评估的理论和方法；第三部分介绍研究区概况；第四部分对塔里木河下游植被生态风险的主要风险因子进行了分析；第五部分为塔里木河下游植被生态风险的综合评估，包括评价单元的选择、指标体系的建立、指标权重的确定、隶属度的确定、建立评估模型、风险评估与制图、评估结果的验证等；第六部分提出生态风险的对策建议；第七部分对本文的研究做出了总结，并提出了今后生态风险评估的发展方向。Recently Ecological Risk Assessment (ERA) has played an important role in environment science. But so far, Ecological Risk Assessment shorts a set of integrated method. Therefore, based on the progress in Ecological Risk Assessment researching of home and abroad, this paper analyzed thoroughly the basic theories and methods of Ecological Risk Assessment, and brought forward the quantitative assessment method by Remote Sensing which aimed at the ecosystem environment characteristics in arid area. This paper taking the lower breaches of Tarim river which is the biggest continental river in China as study area, accomplished the vegetation ecological risk assessment by the methods of Fuzzy Synthetic Evaluation and Remote Sensing and Geographic Information System. The conceptual frame of ERA and ideology of Analytic hierarchy process (AHP) were used to establish the index system in the process of assessment. On the basis of the results from ecological risk assessment, the visual analysis was processed and the proposals were offered. The full text was divided into the following eight parts: Part One introduced the basic conception of Ecological Risk Assessment, the domestic and international study progress, and the application of RS to Ecological Risk Assessment; Part Two focused on the theories and the methods of Ecological Risk Assessment; Part Three introduced the general situation about the study area; Part four analyzed the main risk factor of the vegetation ecosystem risk in the lower reaches of Tarim river; Part Five was the comprehensive evaluation of the vegetation ecosystem risk including the selection of assessment unit, the establishment of the index system, the calculation of the index weight, the calculation of fuzzy subordination, the model making, the risk evaluation and the results drawing, and the verification of ecological risk assessment results etc. Part Six offered the proposals of dealing with the ecological risk; At last, Part Seven summarized the research contexts of this paper and put forward the development direction of Ecological Risk Assessment in the future.
语种	中文
学科主题	在生态环境科学上的应用
公开日期	2010-11-12
页码	共63页
内容类型	学位论文
源URL	[http://ir.xjlas.org/handle/365004/8166]
专题	新疆生态与地理研究所_中国科学院新疆生态与地理研究所(2010年以前数据)
推荐引用方式 GB/T 7714	蒋良群　. 干旱区河流植被生态风险遥感定量评估[D]. 中国科学院．中国科学院新疆生态与地理研究所．地图学与地理信息系统．. 2005.

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