长江上游水源涵养区界定及生态安全影响因素分析  

Delimitation of water conservation areas in the upper Yangtze River and analysis of influencing factors on eco-security

作　　者：董伟[1,2] 蒋仲安[1] 苏德[2] 高吉喜[3] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中中国环境科学研究院,北京100012 [3]中国环境科学研究院,北京100012

出　　处：《北京科技大学学报》2010年第2期139-144,共6页Journal of University of Science and Technology Beijing

基　　金：联合国环境规划署UNEP资助项目(No.IMIS:GFL-2328-2740-4822)

摘　　要：对长江上游水源涵养区进行了详细地划分,采用生态系统内外部指标相结合的方法,建立界定指标体系,以界定模型结合ArcGIS空间分析模块的手段,界定出重点水源涵养区.结合研究区实际情况,根据压力-状态-响应(P-S-R)框架模型建立了多层次结构的生态安全评价指标体系.运用层次分析-向量相似度-主成分投影法对重点水源涵养区生态安全状况进行评价.针对评价结果,采用灰关联分析方法进行研究区生态安全影响因素关联度综合分析.研究结果表明:影响研究区生态安全的主要因素是降雨量、GDP增长率、水资源有效利用率、植被覆盖度和水环境质量.In order to partition water conservation areas in the upper Yangtze River, inner and external indexes in an ecosystem were used to constructed a delimitation index system, and the key water conservation areas were delimitated by the delimitation model in combination with the ArcGIS Spatial Analyst. Based on the actual situation of research areas, a multi-level and multi-structure index system for eco-security assessment was built with the PSR （pressure-state-response） model framework. Eco-security assessment of the key water conservation areas was carried out by a combined application of AHP （ analytic hierarchy process） , vector similarity and principal component projection method. Gray correlation was added in finding out the main influencing factors on regional eco-security. The results show that these main factors are rainfall, increase rate of GDP, effective utilization rate of water resources, vegetation coverage, and water environmental quality.

关 键 词：生态安全 界定 灰关联 水源涵养区 

分 类 号：X171.1[环境科学与工程—环境科学]