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引用本文:朱金格,刘鑫,邓建才,彭俊翔,张海涛.太湖西部环湖河道污染物输移速率变化特征.湖泊科学,2018,30(6):1509-1517. DOI:10.18307/2018.0603
ZHU Jinge,LIU Xin,DENG Jiancai,PENG Junxiang,ZHANG Haitao.Pollutant transport rates in the rivers around western Lake Taihu. J. Lake Sci.2018,30(6):1509-1517. DOI:10.18307/2018.0603
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太湖西部环湖河道污染物输移速率变化特征
朱金格1, 刘鑫2, 邓建才1, 彭俊翔2, 张海涛2
1.中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京 210008;2.中国科学院大学, 北京 100049
摘要:
阐明污染物出入湖输移速率对于湖泊陆域污染控制具有重要意义.本文研究了太湖西部主要环湖河道总氮(TN)、溶解性总氮(DTN)、总磷(TP)、溶解性总磷(DTP)和高锰酸盐指数(CODMn)输移速率变化特征.结果表明环湖河道上述指标净输入速率分别为707.9、727.0、28.8、18.2和700.9 g/s.城东港、百渎港、大浦港和沙塘港4条河道TN、DTN、TP、DTP和CODMn输入速率分别占西部河道总输入速率的62.7%、63.6%、67.1%、66.6%和64.8%.太浦河、长兜港和大钱港TN、DTN、TP、DTP和CODMn输出速率占总输出的86.5%、86.9%、85.0%、85.3%和80.6%.污染物净输入速率受水情影响,TN和DTN浓度汛前最大,而TP、DTP、CODMn浓度汛期增大,汛后分别降低44.2%、48.8%和39.8%.城东港氮、磷输入速率受浓度控制,其他河道各指标输移速率受流量控制.近岸湖体TN浓度与入湖速率呈显著正相关,而离岸湖体TN、TP、CODMn浓度对入湖速率的变化响应不明显.
关键词:  控氮  入湖河道  外源污染  太湖西部  输移速率
DOI:10.18307/2018.0603
分类号:
基金项目:国家自然科学基金项目(51609235)、江苏省自然科学基金项目(BK20151063)和国家水体污染控制与治理科技重大专项(2017ZX07205002)联合资助.
Pollutant transport rates in the rivers around western Lake Taihu
ZHU Jinge1, LIU Xin2, DENG Jiancai1, PENG Junxiang2, ZHANG Haitao2
1.State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China;2.University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Abstract:
Elucidating transport rate of pollutants of the rivers around the lake is of great significance to clarify and control the external pollution. Spatial and temporal variations of pollutants transport rate of the rivers around western Lake Taihu were studied according to monthly investigation. The results show that the net input rate of total nitrogen(TN) to the lake was 707.9 g/s, slightly lower than that of dissolved total nitrogen (DTN, 727.0 g/s). The input rate of total phosphorus(TP), dissolved total phosphorus (DTP) and permanganate index (CODMn) were 28.8 g/s, 18.2 g/s and 700.9 g/s, respectively. The input of pollutants was mainly form Chengdong River, and followed by Baidu River, Dapu River and Shatang River. The input rates of TN, DTN, TP, DTP and CODMn in the 4 rivers accounted for 62.7%, 63.6%, 67.1%, 66.6% and 64.8% of the total input rate respectively. The output of the pollutants was mainly via Taipuhe River, Changdou River and Daqian River and accounted for 86.5%, 86.9%, 85.0%, 85.3% and 80.6% of the total output rate, respectively. The net input rate of TN and DTN was high before flood season, decreased about 25.0% in flood season. The net input rate of TP, DTP and CODMn increased in flood season, whereas decreased about 44.2%, 48.8% and 39.8%, respectively after flood season. The transport rate of nitrogen and phosphorus in Chengdong River was significantly influenced by its concentration, but transport rate of each index in other rivers was influenced by flow flux. The concentration of TN in nearshore lakes was not significantly correlated with TN concentration of rivers, but significant positive correlated with the transport rate of surrounding rivers. Concentrations of TN, TP and CODMn of offshore lakes have no obvious response to the changes of pollutants input rates.
Key words:  Nitrogen control  inflow rivers  external pollution  western Lake Taihu  transport rates
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