摘要
为评价长江上游支流小江的河流生态健康状况,根据2016年三峡库区小江15个典型断面浮游植物的定量分析数据,计算了小江浮游植物完整性指数(P-IBI)。在此基础上构建了其河流生态健康评价指标体系和标准,对其进行了健康评价。结果显示:小江总体处于健康状态,但局部问题不可忽视。小江上游段呈理想状态,中游段呈亚健康状态,下游段呈不健康状态,局部样点呈现病态。15个断面有3个处于不健康状态,3个处于病态状态,受损断面主要集中在中下游河段,存在水华爆发的风险。从调节坝坝下的"普里河汇入口上游"到"礁石子渡口"段是受损最严重的河段。这可能是由于局部河段污染负荷大,回水区水体自净能力弱导致,应重点关注,加强管理,有针对性地进行污染物排放控制和水环境修复治理。
In order to evaluate the ecological health of the Xiaojiang River in the Three Gorges Reservoir area,the phytoplankton quantitative analysis data of 15 typical cross-sections of the Xiaojiang River in 2016 are selected and the phytoplankton index of biotic integrity(P-IBI)is calculated.On this basis,the evaluation index system and criteria for the health of the River are constructed,and the health status of the Xiaojiang River is evaluated.The results show that the Xiaojiang River is still in a healthy state,but the problems in local areas cannot be ignored.The upper reaches of the Xiaojiang River are in an ideal state,the middle reaches are in a sub-healthy state,the downstream ones are in an unhealthy state,and the local spots are pathological.Three of the 15 sections are in unhealthy state and three are in morbid state.The damaged reaches are mainly concentrated in the middle and lower reaches of the river and there risk of outbreaks of water blooms exist.The most seriously damaged section of the river is from the confluence in the upperstream of the Puli River to Jiaoshizi Crossing in the downstream of the regulating dam.This may be due to the large local pollution load and poor self-purification capacity of the water in the backwater area,it should be focused on,strengthening management,and carrying out targeted pollutant discharge control and water environment repair governance.
作者
程帅
左新宇
李同庆
兰峰
CHENG Shuai;ZUO Xinyu;LI Tongqing;LAN Feng(Upper Changjiang River Bureau of Hydrological and Water Resources Survey,Bureau of Hydrology,Changjiang Water Resources Commission,Chongqing 400025,China)
出处
《水利水电快报》
2021年第2期54-60,共7页
Express Water Resources & Hydropower Information
关键词
河流健康评价
浮游植物完整性指数(P-IBI)
小江
三峡库区
river health assessment
Phytoplankton Index of Biotic Integrity(P-IBI)
Xiaojiang River
Three Gorges Reservoir area
