海河流域典型河口生态系统健康评价

根据河口生态系统健康内涵,建立了河口生态系统健康评价模型,即构建了河口生态系统健康评价指标体系,确立了生态系统健康等级及标准,通过层次分析法确定了指标权重,提出了基于计点模型的河口生态系统健康综合评价方法.以建立的评价模型对漳卫新河河口进行生态系统健康综合评价,揭示漳卫新河河口生态系统健康状况以及形成原因,并提出河口生态恢复和科学管理的建议.结果表明,漳卫新河河口生态系统健康综合指数为0.355 3,处于不健康状态,流域水资源过度开发、污染物大量排放等不合理人类活动是造成河口生态系统严重退化的主要原因.

Assessment of ecosystem health for typical estuary in Haihe River Basin

Based on the connotation of estuary ecosystem health, a model for evaluating estuary ecosystem health is proposed. A set of index system of estuary ecosystem health assessment has been designed. The grade and standard of ecosystem health is established. The weight of indicators is determined by means of analytic hierarchy process(AHP); and point count model is applied to comprehensive evaluation of estuary ecosystem health. The model is applied to evaluate ecosystem health in Zhangwei New River Estuary. Ecosystem health condition and the related cause is revealed in Zhangwei New River Estuary. Meanwhile,some suggestions are put forward for ecological restoration and scientific management in the future. The results show that the ecological health index of Zhangwei New River estuary is 0. 3553, which is in the unhealthy condition.The main reasons, cause the damage to estuary ecosystem, are attributed to unreasonable human activities, such as over-exploitation of water resources in basin, pollutant emission.