Health Assessment of the Tuojiang River in Chengdu Municipality
This study evaluated the aquatic ecosystem health status of the Chengdu Section of Tuojiang River Basin and explored an effective index evaluation method to comprehensive measure ecological health of the river section.We investigat-ed the physical,chemical and biological factors such as hydrology,water quality,habitat,benthic invertebrates and fishes,and conducted a comparative analysis using the WEQIriver comprehensive index method and the RHI comprehensive index method.The WEQIriver comprehensive index method based on water quality,habitat and benthic invertebrates showed that the Chengdu section was in good condition.The results of RHI comprehensive index method based on the natural condition of the riverbank,degree of illegal exploitation and utilization of the riverbank,degree of ecological flow,degree of water pollu-tion,self-purification capacity of the water,fish retention index and public satisfaction showed that the whole basin was in a sub-health state.The results of the two methods showed that the environmental condition of the mainstream and upstream tributaries was better than the downstream tributaries.The environmental conditions of some sites were quite different be-cause they were influenced by the different focuses of the two methods.WEQIriver comprehensive index lays more emphasis on the state of water ecosystems itself,while RHI comprehensive index lays more emphasis on the interference level of hu-man activities to water ecosystems.The better effect is achieved by integrating the two methods in water ecosystem health as-sessment.
Tuojiang River BasinChengduaquatic ecosystemriver health assessmentcomprehensive index method
万方数据
维普
