PSR模型在青海省生态安全评价中的应用  

Application of the PSR Model in assessing ecological security in Qinghai Province

作　　者：李小玲[1,2] 刘逸瑞 王成 保长佩 LI Xiaoling;LIU Yirui;WANG Cheng;BAO Changpei(School of Civil Engineering and Water Conservancy,Qinghai University,Xining 810016,China;Qinghai Provincial Key Laboratory of Building Energy Saving Materials and Engineering Safety,Xining 810016,China)

机构地区：[1]青海大学土木水利学院,西宁810016 [2]青海省建筑节能材料与工程安全重点实验室,西宁810016

出　　处：《安全与环境学报》2025年第2期757-766,共10页Journal of Safety and Environment

基　　金：青海省科学技术厅项目(2019-ZJ-985Q)。

摘　　要：为了对青海省的生态安全水平进行定量评价,分析并认识青海省生态状况及其影响因素,进而为生态工作提供相应方向和措施,研究基于“压力-状态-响应”(Pressure-State-Response,PSR)模型构建青海省生态安全评价体系,采用熵权法计算指标权重,运用综合指数法评价分析青海省生态安全的状况,并采用灰色关联度法和障碍度模型,分析影响青海省生态安全的关键因素。结果显示:(1)青海省生态安全指数整体呈现“波浪式”上升趋势,安全等级由较不安全等级逐年上升至较安全等级。(2)从关联度来看,在子系统中,状态子系统占主要地位。在各评价指标中,影响青海省生态安全的因素主要集中于经济和环境维度。(3)从障碍度来看,目前阻碍青海省生态安全发展的障碍因子主要为造林面积、治理废气项目完成投资、二氧化硫排放量等要素。在2005—2020年,青海省生态安全水平显著提高,但仍有提升空间。政府需积极落实政策,发展绿色产业,保护生态环境,实现走可持续发展道路。To quantitatively evaluate the level of ecological security in Qinghai Province and to analyze and understand its ecological situation along with the influencing factors,this study aims to provide targeted direction and measures for ecological management.Based on the Pressure-State-Response(PSR)model,an ecological security evaluation system for Qinghai Province has been developed,encompassing three key aspects:pressure,state,and response.The entropy weight method was employed to calculate index weights,while the comprehensive index method was utilized to evaluate and analyze the ecological security of Qinghai Province and its subsystems.The ecological security status of Qinghai Province was categorized into five levels.Additionally,key factors influencing ecological security were examined using the grey correlation method and the obstacle degree model.The results indicated that:(1)The overall ecological security index of Qinghai Province exhibited a“wave-like”upward trend,with the security level improving year by year from a less secure status to a more secure one.(2)From the perspective of correlation,the state subsystem emerged as the primary subsystem.The evaluation indices revealed that the factors impacting the ecological security of Qinghai Province are primarily concentrated in the economic and environmental dimensions,with both the economic level and environmental responses demonstrating a significant positive correlation with the overall level of ecological security.The overall ecological security of Qinghai Province reflects a trend where economic development leads environmental governance.(3)From the perspective of obstacle degree,the primary challenges to improving ecological security in Qinghai Province currently include factors such as afforestation area,investment in waste gas treatment projects,and sulfur dioxide emissions.From 2005 to 2020,the level of ecological security in Qinghai Province has improved significantly;however,there is still room for further enhancement.It is essential to acti

关 键 词：环境科学技术基础学科 生态安全 综合指数法 灰色协调度法 障碍度模型 

分 类 号：X826[环境科学与工程—环境工程]