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5. 基于物元模型的民勤绿洲土地生态安全评价

基于物元模型的民勤绿洲土地生态安全评价

来源 :中国沙漠 | 被引量 : 36次 | 上传用户：fmylqy

【摘 要】

：

针对生态脆弱区民勤绿洲土地与生态环境系统的特点,运用"经济-环境-社会"模式和层次分析法构建了该区域土地生态安全评价的指标体系和权重,基于物元理论建立了土地生态安全的复合物元模型,对民勤绿洲土地生态安全进行了研究。结果表明:①2005—2007年民勤绿洲土地生态安全整体上呈现出"不安全—较不安全"的上升趋势,并有向更好等级发展的动向,说明近年民勤绿洲环境保护投入和治理绩效明显。②各单项指标存在明显

【作 者】

：

齐鹏 张仁陟 王晓娇 陈英 马国军 

【出 处】

：

中国沙漠

【发表日期】

：

2012年05期

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论文部分内容阅读

针对生态脆弱区民勤绿洲土地与生态环境系统的特点,运用"经济-环境-社会"模式和层次分析法构建了该区域土地生态安全评价的指标体系和权重,基于物元理论建立了土地生态安全的复合物元模型,对民勤绿洲土地生态安全进行了研究。结果表明:①2005—2007年民勤绿洲土地生态安全整体上呈现出"不安全—较不安全"的上升趋势,并有向更好等级发展的动向,说明近年民勤绿洲环境保护投入和治理绩效明显。②各单项指标存在明显的分异。人均水资源、化肥施用量、森林覆盖率、荒漠化程度、工业废水排放达标率、贫困人口比例和能耗成为制约该

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