摘要
依据2010—2019年南宁主要河流及水库水质监测数据,应用季节性肯达尔趋势分析法、平均污染指数法、营养状态指数法对南宁主要河流近10年水质进行趋势分析,以期总结区域性的水质污染特征,为南宁水资源保护提出建议。结果表明:2010—2019年南宁市主要河流水质总体趋势向好,主要河流多年平均水质为Ⅱ类水,水质优良,平均污染指数0.159,为清洁水体。除磷和阴离子表面活性剂的浓度呈上升趋势,其他项目为下降或无趋势,南宁市城区废污水排放对郁江的水质影响最大,主要河流出入境断面水质变化趋势向好。凤亭河水库处于中营养状态,总氮、总磷、氨氮、BOD_(5)、COD和营养状态指数均呈上升趋势。
Based on the water quality monitoring data of main rivers and reservoirs in Nanning City from 2010 to 2019,the water quality change trend of main rivers of Nanning in recent ten years was analyzed by seasonal Kendal trend analysis method,average pollution index method and nutritional status index method,so as to summarize the regional water quality pollution characteristics and put forward water resources protection suggestions for Nanning.The results of analysis demonstrate the overall water quality trend of main rivers in Nanning is good from 2010 to 2019 with a mean annual water quality of class II and average pollution index of 0.159.Except the concentration of phosphorus and anionic surfactant showed an upward trend,other items showed a decline or no trend.The discharge of waste water in Nanning City has the greatest impact on the water quality of Yujiang River.The change trend of water quality at the entry-exit section of main rivers is good.The water of Fengtinghe Reservoir is at medium nutri⁃ent level with the indexes of total nitrogen,total phosphorus,Ammonia nitrogen,BOD_(5),COD and nutrition state in⁃dex all showing an upward trend.
作者
毛小英
吕俊
MAO Xiao-ying;LVJun(Hydrology Center of Nanning City,Nanning 530008,China;Hydrology Center of Guangxi Zhuang Autonomous Region,Nanning 530023,China)
出处
《广西水利水电》
2021年第6期1-9,共9页
Guangxi Water Resources & Hydropower Engineering
关键词
河流
水质评价
趋势分析
南宁市
River
water quality evaluation
trend analysis
Nanning City
