降雨特征对赣江南昌段河流断面不同水期的水质影响分析  

EFFECTS OF RAINFALL CHARACTERISTICS ON RIVER WATER QUALITY IN DIFFERENT WATER PERIODS:A CASE STUDY OF NANCHANG SECTION IN THE GANJIANG RIVER

作　　者：刘文强[1,2,3] 郁达伟 李昆[1] 郑利兵[2,3] 朱利英[2,3] 桂双林 魏源送 LIU Wenqiang;YU Dawei;LI Kun;ZHENG Libing;ZHU Liying;GUI Shuanglin;WEI Yuansong(School of Resources&Environment,Nanchang University,Nanchang 330031,China;State Key Joint Laboratory of Environment Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;Department of Water Pollution Control Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100049,China;Jiangxi Academy of Sciences,Nanchang 330096,China)

机构地区：[1]南昌大学资源与环境学院,南昌330031 [2]中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室,北京100085 [3]中国科学院生态环境研究中心水污染控制实验室,北京100085 [4]中国科学院大学资源与环境学院,北京100049 [5]江西省科学院,南昌330096

出　　处：《环境工程》2023年第8期91-99,共9页Environmental Engineering

基　　金：长江生态环境保护修复“一市一策”驻点跟踪研究(二期)(2022-LHYJ-02-0505-01)。

摘　　要：针对赣江南昌段水环境质量问题,以赣江南昌段周坊国考断面为研究对象,采用Mann-Kendall检验、相关性分析等方法分析了赣江南昌段不同水期的降雨特征,并考察了降雨特征对该断面水质的影响。结果表明:1)赣江南昌段该断面COD和NH_(3)-N浓度全年基本符合GB 3838—2002《地表水环境质量标准》Ⅲ类标准,但TP浓度主要在涨水期、其次为枯水期超过GB 3838—2002Ⅲ类标准,TN浓度除在2019-08—2020-02外,均超过GB 3838—2002Ⅲ类标准。2)断面TN和TP的日内时平均变异系数较小(<15%),而COD、NH_(3)-N和浊度的日内时平均变异系数>15%。3)NH_(3)-N浓度通常在年内第1个降雨量较大的月份出现峰值,TP和流量显著相关(R^(2)=0.728,P<0.01)。4)在涨水期和洪水期,该断面水质超标的现象多发生在强降雨后;当枯水期发生强降雨后,水质参数随着降雨均有明显上升。当枯水期发生强降雨后,水质参数随降雨均有明显上升,存在超标的可能性。In this paper,we analyzed the rainfall characteristics of different water periods in Nanchang section of the Ganjiang River by Mann-Kendall test and correlation analysis,and investigated the influence of rainfall characteristics on the water quality of this section,taking the Zhoufang national examination section in Nanchang section as the object.The results showed that:1)COD and ammonia nitrogen concentrations at this section of Nanchang section basically met the surface water categoryⅢstandard in all hourly periods throughout the year,but TP concentrations mainly exceeded the surface water categoryⅢstandard during the high water period,followed by the dry water period,and TN concentrations exceeded the surface water categoryⅢstandard except in 2019-08 to 2020-02;2)the intra-day time-averaged coefficients of variation of TN and TP at the cross sections were small(<15%),while the intra-day time-averaged coefficients of variation of COD,ammonia nitrogen and turbidity were greater than 15%;3)the concentration of ammonia nitrogen tended to peak in the first month of the year when rainfall was higher,and TP and flow were significantly correlated(R^(2)=0.728,P<0.01);4)in the high water period and flood period,the section water quality exceeding the standard mostly occurred after strong rainfall;when the dry period occurred after strong rainfall,water quality parameters with rainfall had a significant increase.

关 键 词：降雨特征 赣江南昌段 不同水期 水质分析 

分 类 号：X52[环境科学与工程—环境工程]