贫困山区生态安全动态评价——以湖北省恩施自治州地区为例

Dynamic Evaluation of Ecological Safety in Poverty Mountainous Areas—Taking Enshi Region of Hubei Province as an Example

采用压力-状态-响应模型,将熵值赋权法与灰色系统理论相结合,对恩施贫困山区生态安全指数进行动态评价,并将生态安全综合指数与贫困村数进行空间耦合。计算结果表明,恩施八县市生态安全体现出以下特点:恩施贫困地区生态安全整体较安全,区域生态环境系统压力持续减小,生态安全现状逐渐转好,但人类面临环境问题采取的对策和措施不积极;各县市生态安全综合指数与贫困村数存在一定负相关性,也就是说,贫困村数越少,生态安全综合指数越高,表明扶贫工作在提升贫困区整体生态安全水平上具有相当的积极作用。

Using pressure-state-resPonse model, combined entropy method with grey theory, the ecological safety index of poor mountainous are-as in Enshi Region was evaluated, space coupling was conducted on ecological safety comprehensive index and poverty villages. The results showed that the ecological safety of 8 counties in Enshi Region has characteristics as following ： the ecology environment of Enshi poor areas is generally safe, regional eco-environment pressure is decreasing continuously, the ecological safety status is gradually improving, but mankind are not active in adopting countermeasures for environmental problems ; the ecological safety comprehensive index of each county has negative correla-tion with poor villages, namely the ecological safety comprehensive index is higher with less of poor villages, indicating that poverty-alleviation work has positive effects on improving general ecological safety level of poverty areas.