基于PSR模型的长株潭地区森林生态安全动态评价

A dynamic assessment of forest ecological security in Changsha-Zhuzhou-Xiantan area based on PSR model

为了揭示长株潭地区森林生态安全演变规律及其影响因素,基于PSR模型,依据研究区具体情况构建森林生态安全评价指标体系,同时利用熵值法赋权,结合模糊综合评价法对研究区森林生态安全状况进行评价分析。结果表明:2006年至2010年长株潭地区森林生态安全综合评价等级值由3.6186增长至3.9040,总体水平都处于"一般"状况;由于受到冰雪灾害和森林火灾的严重影响,2008年森林生态安全综合评价等级值最小。

In order to reveal the evolution rule and influence factors of forest ecological security in Changsha-Zhuzhou-Xiangtan area, according to the concrete conditions of the study area, a set of indices system for assessing forest ecological security was constructed based on PSR model, and the forest ecological security of the study area was analyzed by using entropy method and fuzzy comprehensive evaluation method. The results show that the comprehensive evaluation value of forest ecological security increased from 3.6186 to 3.9040 in 2006 and 2010 and all the overall levels were in state of ＂general＂ . Due to the snow disaster and the serious forest fire, the forest ecological security of 2008 was at the lowest level.