基于熵权法的草原生态安全评价——以甘肃牧区为例

在生态安全评价压力-状态-响应概念框架模型指导下,以甘肃牧区为例,将熵权法与综合评价法有机结合,进行了甘肃牧区草原生态安全评价研究。结果表明,根据该方法得到的草原生态安全评价结论与区域实际相吻合,证明该方法在草原生态安全评价及相关研究领域的应用是科学、可行的。研究中采用熵权法确定评价指标权重,从根本上克服了很多评价指标没有统一标准的问题,减少了人为主观性对评价过程的干扰,从而更客观地反映了各评价指标对区域草原生态安全状况的贡献率,为区域生态安全定量化评价提供了新的手段和研究方法,在定量化评价研究领域具有一定的实用价值和推广意义。

Ecological safety assessment of grassland based on entropy-right method: A case study of Gansu pastoral area

Under the guidance of "pressure-state-response" model,a conceptive model of ecological safety assessment,and by the combination of entropy-right and comprehensive appraisal methods,this paper made an assessment on the grassland ecological safety of Gansu pastoral area.The results of this assessment were in good correspondence to the regional actual situations,indicating that entropy-right method was applicable in this field.Using entropy-right method to determine the weights of assessment indices could resolve the problem of many indices not having unique standard,reduce the disturbance of subjectivity in the course of assessment,and reflect the contribution of each index to regional ecological safety more objectively.This method offered a new research means and idea to quantitatively assess regional ecological safety,and had certain practical value and popularization meaning in the related research fields.