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引用本文:吕文,杨惠,杨金艳,马倩,高晓平,蒋如东,王晓杰,徐勇,聂青.环太湖江苏段入湖河道污染物通量与湖区水质的响应关系.湖泊科学,2020,32(5):1454-1462. DOI:
LV Wen,YANG Hui,YANG Jinyan,MA Qian,GAO Xiaoping,JIANG Rudong,WANG Xiaojie,XU Yong,NIE Qing.Relationship between water quality in Lake Taihu and pollutant fluxes of the rivers surrounding Lake Taihu in Jiangsu Province. J. Lake Sci.2020,32(5):1454-1462. DOI:
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环太湖江苏段入湖河道污染物通量与湖区水质的响应关系
吕文1, 杨惠1, 杨金艳1, 马倩2, 高晓平1, 蒋如东3, 王晓杰4, 徐勇1, 聂青2
1.江苏省水文水资源勘测局苏州分局, 苏州 215011;2.江苏省水文水资源勘测局, 南京 210029;3.江苏省水文水资源勘测局无锡分局, 无锡 214031;4.江苏省水文水资源勘测局常州分局, 常州 213022
摘要:
基于2008—2018年环太湖江苏段入湖河道污染物通量及湖区水质数据,从时空变化及相关关系两个方面探讨了入湖污染物通量与湖区水质的响应关系,并分析了污染物进入湖体影响水质的主要因子.结果表明:太湖污染减排已见成效,氨氮、总氮、高锰酸盐指数和化学需氧量入湖污染物通量整体呈下降趋势,年均下降率分别为8.0%、2.0%、1.6%和2.2%,湖体氨氮和总氮时间格局响应较好,年均下降率分别为2.1%和2.3%.湖体氨氮、总氮、总磷、高锰酸盐指数和化学需氧量与入湖污染物通量整体由西北部、西部湖区向东南部、东部湖区递减,空间格局上响应基本一致.全湖区年尺度总氮、氨氮浓度与入湖河道污染物通量分别呈显著正相关、极显著正相关关系;影响湖区总氮、氨氮的主要因子为入湖河道的总氮、氨氮浓度,其次为入湖河道浓度与原湖区水质差值,因此亟需加强入湖河道水质浓度的控制.
关键词:  污染物通量  太湖  水质  环太湖入湖河道
DOI:
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基金项目:江苏省苏州市水利水务科技项目(2018001)资助.
Relationship between water quality in Lake Taihu and pollutant fluxes of the rivers surrounding Lake Taihu in Jiangsu Province
LV Wen1, YANG Hui1, YANG Jinyan1, MA Qian2, GAO Xiaoping1, JIANG Rudong3, WANG Xiaojie4, XU Yong1, NIE Qing2
1.Suzhou Substation of Jiangsu Province Hydrology and Water Resources Investigation Bureau, Suzhou 215011, P. R. China;2.Jiangsu Province Hydrology and Water Resources Investigation Bureau, Nanjing 210029, P. R. China;3.Wuxi Substation of Jiangsu Province Hydrology and Water Resources Investigation Bureau, Wuxi 214031, P. R. China;4.Changzhou Substation of Jiangsu Province Hydrology and Water Resources Investigation Bureau, Changzhou 213022, P. R. China
Abstract:
Based on pollutant fluxes of the rivers surrounding Lake Taihu in Jiangsu Province and water quality in Lake Taihu, the response relationship between pollutant fluxes of the rivers and water quality in lake was studied from two aspects of temporal and spatial variation and correlation, main factors that affected water quality were analysed after pollutants discharged into lake. The results showed that the temporal distribution of total nitrogen (TN) and ammonia nitrogen (NH3-N) concentrations in Lake Taihu were in good accordance with distribution of TN and NH3-N fluxes in river channels. TN and NH3-N concentrations in the lake declined since 2008, with the decrease rate per year of 2.1% and 2.3%, respectively. The year descending rates of annual influxes of NH3-N, TN, CODMn and CODCr were 8.0%, 2.0%, 1.6% and 2.2%, respectively. TN and NH3-N concentrations in Lake Taihu and their fluxes in river channels were positively significantly correlated. NH3-N, TN, TP, CODMn and CODCr in the western and northwest areas were better than that in the centre, southern and eastern areas, corresponding to pollutant fluxes of the rivers. Analysis of collinearity diagnosis and multiple stepwise regression indicated that TN, NH3-N concentrations in river channels,and difference values of TN, NH3-N concentrations between river and lake were significantly related with water quality in the Lake Taihu. It's desiderated to strengthen the control of river water quality.
Key words:  Pollutant flux  Lake Taihu  water quality  rivers surrounding the Lake Taihu
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