汾河流域生态系统脆弱性评估及变化分析  

Ecosystem Vulnerability Assessment and Change Analysis in Fen River Basin

作　　者：李占兴 王艳慧[1,2] LI Zhanxing;WANG Yanhui(College of Resources Environment and Tourism,Capital Normal University,Beijing 100048,China;Key Laboratory of 3D Information Acquisition and Application,MOE,Capital Normal University,Beijing 100048,China)

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048 [2]首都师范大学三维信息获取与应用教育部重点实验室,北京100048

出　　处：《地理空间信息》2024年第8期45-49,共5页Geospatial Information

基　　金：国家自然科学基金资助项目(41771157);国家重点研发计划资助项目(2018YFB0505400);北京市长城学者资助项目(CIT&TCD20190328)。

摘　　要：探究汾河流域生态系统脆弱性及其时空分布规律,为生态保护工作提供辅助决策支撑。以汾河流域为研究区,通过SRP模型、AHP法与熵权法构建生态脆弱性评价体系,并利用GIS空间分析方法探测其生态脆弱性时空变化特征。(1)从整体来看,汾河流域生态脆弱性程度从0.47降至0.37,有一定改善。(2)从各子流域来看,生态脆弱性程度的改变主要发生在汾河流域上游,多个子流域脆弱性等级下降,截至2020年,呈现出北低南高的空间分布格局。(3)从空间分布格局来看,汾河流域生态脆弱性总体的空间聚集程度有所减弱,太原市及其周边地区所存在的高-高聚集现象也得以消除;生态功能区等限制开发区域的划分以及太原等地产业转型升级有效地改善了当地生态系统脆弱性,应当持续推进,在全流域关闭改造、关闭现有的污染型企业项目,大力发展服务业和现代农业,并针对性实施退耕还林还草政策,提高流域植被覆盖度。To explore the ecosystem vulnerability of Fen River basin and its spatio-temporal distribution,and to provide support for formulation of ecological governance policy,taking Fen River basin as the study area,we used SRP model,AHP method and entropy weight method to construct the ecological vulnerability assessment system,and used GIS spatial analysis method to detect the spatio-temporal changes of ecological vulnerability.The results show that①as a whole,the ecological vulnerability of Fen River basin decreases from 0.47 to 0.37,with some improvement.②From the perspective of each sub basin,the changes in ecological vulnerability mainly occur in the upper reaches of Fen River basin,with multiple sub basins experiencing a decrease in vulnerability levels.As of 2020,the spatial distribution pattern shows a low in the north and high in the south.③From the perspective of spatial distribution pattern,the overall spatial clustering degree of ecological vulnerability in Fen River basin has weakened,and the high-high clustering phenomenon in Taiyuan and its surrounding areas has also been eliminated.The division of restricted development areas such as ecological functional zones and the transformation and upgrading of real estate industries such as Taiyuan have effectively improved the local ecosystem vulnerability.Continuous efforts should be made to close and transform the entire watershed,close existing polluting enterprise projects,vigorously develop service industries and modern agriculture,and implement targeted policies of returning farmland to forests and grasslands to increase the vegetation coverage of watershed.

关 键 词：汾河流域 流域生态系统 脆弱性评估 空间格局 变化分析 

分 类 号：P208[天文地球—地图制图学与地理信息工程]