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中国沙漠 ›› 2011, Vol. 31 ›› Issue (6): 1493-1500.

• 生物土壤与生态 • 上一篇    下一篇

基于遥感和GIS的石羊河流域生态安全评价

张艳丽1,2, 蒲欣冬1,2, 陈怀录1,2, 顾建宇2, 许计平1,2   

  1. 1.兰州大学 城市规划设计研究院, 甘肃 兰州 730000; 兰州大学 资源环境学院, 甘肃 兰州 730000
  • 收稿日期:2010-11-01 修回日期:2010-12-15 出版日期:2011-11-20 发布日期:2011-11-20

Ecological Security Assessment of Shiyanghe River Basin based on GIS and RS

ZHANG Yan-li1,2, PU Xin-dong1,2, CHEN Huai-lu1,2, GU Jian-yu2, XU Ji-ping1,2   

  1. 1.Academy of Urban Planning and Design, Lanzhou University, Lanzhou 730000, China; 2.College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, China
  • Received:2010-11-01 Revised:2010-12-15 Online:2011-11-20 Published:2011-11-20

摘要:

受气候变化、不合理的人类活动等因素的影响,近年来石羊河流域生态环境退化,水资源匮乏,人地矛盾日益尖锐,生态安全面临着严重的危机。以遥感和GIS为技术手段,根据PSR模型框架机理建立了石羊河流域生态安全评价指标体系,采用层次分析法确定了各指标的权重,然后以流域内县级行政单元为评价单元综合评价了石羊河流域生态安全状况。研究结果表明,石羊河流域生态安全状况上游好于中游,中游好于下游;流域内各县生态安全度主要集中在Ⅱ级和Ⅲ级。针对不同区域的生态安全状况,给出了不同的恢复措施和建议。

关键词: 生态安全, 石羊河流域, 遥感和GIS, PSR模型

Abstract: Global climate change and irrational human activities in the past years had resulted in eco-environmental degradation, water shortage, and violent contradiction between man and land in the Shiyanghe River basin. So the basin is now faced with serious ecological crisis. This paper applied RS and GIS as technical means to assess the ecological security in the basin. First, Pressure-State-Response (PSR) model was used to establish the assessment indicator system, and the weights of the indicators were determined by AHP (analytic hierarchy process) method. Then, the assessment of the ecological security in the basin was taken with every county as the assessment unit. Result showed that the status in upstream was better than that in the mid-stream, and the status in mid-stream was better than that in the down stream. The status of most counties in this basin were in degrees of Ⅱor Ⅲ. In the paper, different measures and advices are proposed for all the counties in the basin according to the different ecological security status.

Key words: ecological security, Shiyanghe river basin, RS and GIS, PSR model

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