摘要
于2018年3—11月对北京市沙河水库开展水质监测,分析水环境质量现状,并结合非参数检验、聚类分析等多元统计分析方法识别水质时空变化特征.非参数Kruskal-Wallis H检验结果表明,沙河水库化学需氧量(CODCr)、五日生化需氧量(BOD5)、氨氮(NH3-N)、硝酸盐氮(NO-3-N)、总氮(TN)、总磷(TP)均呈现显著的月份变化,但各污染指标在样点间无显著差异.整体看来,沙河水库为我国《地表水环境质量标准》(GB3838—2002)Ⅳ—劣Ⅴ类标准,总氮是现阶段的主要污染物.月份聚类分析将10个月份分为3个聚类组,分别为春季、夏季和秋季,相似性百分比分析显示导致聚类组差异的主要水质指标为CODCr、TP、NH3-N,与底泥污染物的释放密切相关.沙河水库出库断面水质优于南沙河、北沙河入库水质,表明沙河水库存在一定的自净能力.
Water quality monitoring was carried out at the Shahe Reservoir in Beijing in 2018 from March to November.Subsequently,the environmental quality analysis was conducted,and the temporal and spatial variation characteristics of water quality were identified by combining cluster analysis,non-parametric test and other multi-statistical analysis methods.The non-parametric Kruskal-Wallis H test results showed that CODCr,BOD5,NH3-N,NO-3-N,TN and TP of the Shahe Reservoir varied significantly from month to month;however,there was no significant difference in the pollution indicators among the sampling points.Generally,the Shahe Reservoir water quality meets theⅣto inferiorⅤstandard of the Surface Water Environmental Quality Standards(GB 3838—2002)in China,and TN is currently the main pollutant.The monthly cluster analysis divided 10 sampling months into 3 clusters,which were spring,summer and autumn.The similarity percentages analysis showed that the main water quality indicators leading to the cluster groups were CODCr,TN and NO-3-N.Those differences were closely related to the release of sediment pollutants.The water quality of the Shahe Reservoir effluent was better than that of the Nansha River and Beisha River influent,which indicated that the Shahe Reservoir had a certain self-purification capacity.
作者
余昊翔
杨东翰
谢梦飞
曲丹
邱斌
刘永泽
李鹏飞
郭鹏
YU Haoxiang;YANG Donghan;XIE Mengfei;QU Dan;QIU Bin;LIU Yongze;LI Pengfei;GUO Peng(Beijing Key Laboratory for Source Control Technology of Water Pollution,Beijing Forestry University,Beijing,100083,China;College of Environmental Science and Engineering,Beijing Forestry University,Beijing,100083,China;Section of Changping District,Beijing Northern Canal Management Committee,Beijing,102206,China;Shahe Gate Management Office,Changping District,Beijing,102206,China)
出处
《环境化学》
CAS
CSCD
北大核心
2020年第10期2849-2857,共9页
Environmental Chemistry
基金
北京林业大学青年教师科学研究中长期项目(2015ZCQ-HJ-01)
国家水专项课题(2017ZX07102-002-003)资助
关键词
沙河水库
水质时间变化
水质空间变化
Shahe Reservoir
temporal variation of water quality
spatial variation of water quality
