HOU Yule,LI Gang,QU Junfeng,et al.Evaluation of Land Eco-security Based on Improved Grey Target Model—A Case of Xuzhou City, Jiangsu Province[J].Research of Soil and Water Conservation,2017,24(01):285-290.
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
- Title:
- Evaluation of Land Eco-security Based on Improved Grey Target Model—A Case of Xuzhou City, Jiangsu Province
- Keywords:
- land eco-security; grey target model; approaching degree; Xuzhou City
- 分类号:
- X826
- 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:
- In order to solve the problem of the limitations of evaluation standards in application, grey target theory was introduced to evaluate land eco-security. To eliminate the unreasonable influence of equal-weighted in traditional grey target model, index weights were introduced to improve the traditional gray target model. Then, an improved gray target model based on entropy weight was proposed and used to evaluate land eco-security of Xuzhou City. The results show that, from 2003 to 2012, integrated approaching degree of land eco-security increased from 0.665 3 to 0.943 5 and security level shifted from unsafe to ideal security level. The land eco-security presemts the good trend. But the social eco-security has been fluctuated around the critical safety level and exists security risk. Compared with the comprehensive index method, the improved grey target model has similar trends about approaching degrees and safety levels. The improved grey target model for evaluation of land eco-security is feasible, and can avoid the limitations of land eco-security evaluation standards and has a certain application value.
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备注/Memo
收稿日期:2016-05-25;改回日期:2016-06-17。
基金项目: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）
作者简介:侯玉乐(1991-),男,河南洛阳人,硕士研究生,主要研究方向为土地复垦与生态重建。E-mail:ylhoucumt@126.com
通讯作者:渠俊峰(1974-),男,江苏徐州人,博士,硕士生导师,主要研究方向为土地复垦、生态修复。E-mail:qjf4209779@163.com