Cao Ming-lan, Li Ya-dong
College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China.
Ying Yong Sheng Tai Xue Bao. 2009 Sep;20(9):2214-8.
Based on 'pressure-state-response' model and by using emergy analysis method, the urban ecological security assessment system and urban ecological security index (EUESI) were constructed, and the variation of ecological security level of Tangshan City in 1995-2005 was evaluated. During this period, the ecological security level of the city increased first and decreased then. The EUESI increased from 0.017 in 1995 to 0.022 in 1996, then dropped yearly, and became unsecure in 2003. The urban ecological security assessment method based on emergy analysis overcame the disadvantages of conventional assessment system, e.g., numerous and repetitive indicators, non-uniform units, and poor comparability, and reflected the urban ecological security state more objectively, being able to provide scientific basis for urban ecological environment management and decision-making.
基于“压力—状态—响应”模型，运用能值分析方法，构建了城市生态安全评价体系和城市生态安全指数（EUESI），并对唐山市1995—2005年生态安全水平的变化进行了评价。在此期间，该市生态安全水平先上升后下降。EUESI从1995年的0.017增至1996年的0.022，随后逐年下降，2003年变为不安全状态。基于能值分析的城市生态安全评价方法克服了传统评价体系指标繁多重复、单位不统一、可比性差等缺点，更客观地反映了城市生态安全状况，能够为城市生态环境管理与决策提供科学依据。
