基于PSR模型的长潭水库生态安全评价研究

结合长潭水库生态环境现状和生态安全评价研究成果,着眼长潭水库生态系统特征,将水库生态健康、人类活动压力及水库生态响应等3大类指标纳入生态安全研究框架,运用Pressure-State-Response （PSR）模型,建立包含3个层次18个指标的水库生态安全评价指标体系,采用熵权法确定各指标权重,对长潭水库生态安全状况进行评估.结果表明,2008年-2011年间,长潭水库生态安全状况呈好转趋势.讨论了长潭水库目前生态安全保护中存在的主要环境问题并提出相关建议.

Ecological Security Evaluation Based on PSR Model for Changtan Reservoir

The evaluation imlex of ecological security system was built to evaluate the ecological security condition of Changtan reservoir based on Pressure- State -Response（PSR） model. The present ecological condition of Changtan reservoir, the latest research conclusion of ecological security, and the ecosystem feature of Changtan reservoir were considered sufficiently during the evaluation system built. And the final ecological security system included three types of index, which related to the ecological health of reservoir, the pressure from human activity, and the ecological response of the reservoir. Entropy method was used to define the weight of each assessment index, and related data of 2008 - 2011 were collected to calculate the ecological security condition. The results showed that the ecological security condition of Changtan reservoir was improved from 2008 to 2011. At last, the major environmental problem of Changtan reservoir was analyzed and several protection measures for reservoir protection were discussed.