雅砻江流域生态脆弱性评价研究  

Ecological vulnerability evaluation of Yalong river basin

作　　者：王晗 伍良旭 邵怀勇[1] WANG Han;WU Liang-xu;SHAO Huai-yong(College of Earth Science,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学地球科学学院,成都610059

出　　处：《湖北农业科学》2020年第13期84-88,96,共6页Hubei Agricultural Sciences

基　　金：国家自然科学基金项目(41302282);四川省科技厅应用基础计划项目(2015JY0145)。

摘　　要：基于GIS技术,从地形、气象、植被、土壤和人类活动等方面选取评价指标,采用空间主成分分析法对雅砻江流域生态脆弱性进行了定量评价,并探索了1995、2005、2015年生态脆弱性空间格局特征与驱动力作用。结果表明,从时间尺度来看,雅砻江流域生态脆弱性综合指数逐渐升高,生态环境状况整体处于中等水平;从空间尺度上看,从上游到下游生态脆弱性等级逐渐降低。不同海拔梯度带上,极高海拔地区(≥4500 m)和高海拔地区(3500~4500 m)生态脆弱性程度较高,中高海拔地区(2500~3500 m)、中海拔地区(1500~2500 m)和低海拔地区(<1500 m)生态脆弱性程度相对较弱。由于当地政府大力推行生态环境保护政策,当地居民环境保护意识增强,研究区内9个县市2005年生态环境情况逐渐改善。Based on GIS,evaluation indicators from terrain,meteorology,vegetation,soil,human activities,et al,were selected,spatial principal component analysis was used to quantitatively evaluate the local ecological vulnerability of Yalong river basin,and the spatial pattern characteristics and driving force of ecological vulnerability in 1995,2005 and 2015 were explored.The results showed that,in terms of time scale,the comprehensive index of ecological vulnerability of Yalong river basin increased gradually,and the overall condition of ecological environment was at a medium level.In the perspective of spatial scale,the ecological vulnerability degree gradually reduced from upstream to downstream.In different altitude gradient zones,the ecological vulnerability degree of the extremely high altitude area(≥4500 m)and the high altitude area(3500~4500 m)was relatively high,while the ecological vulnera⁃bility degree of the middle and high altitude area(2500~3500 m),the middle altitude area(1500~2500 m)and the low altitude ar⁃ea(<1500 m)was relatively weak.Owing to the vigorous implementation of ecological environment protection policies by the local gov⁃ernment and the enhanced environmental protection awareness of local residents,the ecological environment of 9 counties in the study area improved from 2005.

关 键 词：生态脆弱性 主成分分析 影响因素 雅砻江流域 

分 类 号：X171.4[环境科学与工程—环境科学]