基于改进灰靶模型的土地生态安全评价——以江苏省徐州市为例

发布时间：2018-01-09 11:06

本文关键词：基于改进灰靶模型的土地生态安全评价——以江苏省徐州市为例?　出处：《水土保持研究》2017年01期 　论文类型：期刊论文

【摘要】：尝试引入灰靶理论进行土地生态安全评价,以解决目前土地生态安全评价中参照标准的适用局限性问题。同时,为消除传统灰靶模型等权的不合理影响,引入指标权重对传统灰靶模型进行改进,建立了基于熵权的改进后灰靶评价模型,并将其应用于徐州市土地生态安全评价。结果表明:2003—2012年,徐州市土地生态安全综合靶心度值由0.665 3上升为0.943 5,安全等级由不安全级提升到理想安全级,其土地生态安全整体处于变好的趋势;但土地社会生态安全一直在临界安全级附近波动,存在安全风险。与综合指数法相比,改进后灰靶评价模型得到的靶心度值的变化趋势与其基本一致,两者的安全等级变化完全吻合。表明改进后的灰靶评价模型能够用于土地生态安全评价,并能避免参照标准的适用上存在局限性这一问题,具有一定的应用价值。
[Abstract]:This paper attempts to introduce the grey target theory to evaluate the land ecological security in order to solve the problem of the limitation of the reference standard in the present land ecological security evaluation. At the same time, in order to eliminate the unreasonable influence of the traditional grey target model and other rights. The index weight is introduced to improve the traditional grey target model, and an improved grey target evaluation model based on entropy weight is established, which is applied to the evaluation of land ecological security in Xuzhou City. The results show that: 2003-2012. The comprehensive target value of land ecological security in Xuzhou was raised from 0.665 3 to 0.943 5, and the safety level was raised from unsafe level to ideal security level, and the overall land ecological security was in a trend of improvement. However, the ecological security of land and society fluctuates all the time near the critical safety level, and there is a security risk. Compared with the comprehensive index method, the change trend of the target centroid value obtained by the improved grey target evaluation model is basically consistent with that of the improved grey target evaluation model. The result shows that the improved grey target evaluation model can be used for land ecological security evaluation and can avoid the limitation of the application of the reference standard. It has certain application value.
【作者单位】：中国矿业大学环境与测绘学院;中国矿业大学低碳能源研究院;
【基金】：中央高校基本科研业务费专项资助项目“高潜水位采煤沉陷地水盐运移特征及调控研究”(2011QNB12)
【分类号】：X826;F301.2
【正文快照】： 土地生态安全研究源于近年来兴起的“生态安全”研究,并已逐渐成为土地可持续利用研究的热门课题[1]。一般认为,土地生态安全是指在一定的时空范围内,土地生态系统能够保持自身结构、功能不受或少受威胁的状态并能为人类的生存和发展提供相应数量和质量的服务,从而达到土地自

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