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.