基于熵权灰色关联分析的小流域生态安全评价——以定西市安家沟小流域为例  

The Ecological Security Evaluation of Small Watershed Based on Entropy Weight and Gray Correlation Analysis——A Case Study of the Anjiagou Small Watershed in Dingxi City

作　　者：彭静波[1] 邸利[2] 林斌[2] 石斌[1] 于世广[2] 

机构地区：[1]甘肃农业大学林学院,甘肃兰州730070 [2]甘肃农业大学资源与环境学院,甘肃兰州730070

出　　处：《湖南农业科学》2010年第4期84-87,共4页Hunan Agricultural Sciences

基　　金：甘肃省自然科学基金暨中青年科技基金项目(3ZS061-A25-011);中国-全球环境基金项目(GEF/OP12)

摘　　要：以定西市安家沟小流域为例,基于压力-状态-响应(PSR)模型,选取17个指标构建小流域生态安全评价指标体系。采用熵权法对各指标赋权,利用灰色关联方法计算安家沟小流域的生态安全的关联度,得出安家沟小流域在不同时段生态安全指数,并对其发展进行一定预测。该方法具有一定的客观现实性,为小流域生态安全评价提供更科学的依据。Taking the Anjiagou small watershed in Dingxi city as an example,based on the Pressure-State-Response（PSR） model,17 indexes were selected to construct the ecological security evaluation index system of small watershed.The entropy weight method was used to determine the weight of every index,and the correlation degree of the ecological security in the Anjiagou small watershed was calculated by the gray correlation analysis.The ecological security index of the Anjiagou small watershed in different periods was obtained,and the predication of its future development was presented.This method is objective and realistic,and it provides a more scientific basis for the ecological security evaluation of small watersheds.

关 键 词：小流域 生态安全评价 熵权 灰色关联分析 

分 类 号：S157.2[农业科学—土壤学]