| 滇池河流氮入湖负荷时空变化及形态组成贡献 |
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| 引用本文： | 李乐,王海芳,王圣瑞,张蕊,焦立新,丁帅,余佑金.滇池河流氮入湖负荷时空变化及形态组成贡献[J].环境科学研究,2016,29(6):829-836. |
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| 作者姓名： | 李乐 王海芳 王圣瑞 张蕊 焦立新 丁帅 余佑金 |
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| 作者单位： | 1.中北大学化工与环境学院, 山西 太原 030051 ;中国环境科学研究院, 环境基准与风险评估国家重点实验室, 北京 100012 ;中国环境科学研究院, 国家环境保护湖泊污染控制重点实验室, 湖泊生态环境创新基地, 北京 100012 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2012ZX07102-004)；国家自然科学基金项目(U1202235) |
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| 摘 要： | 为给进一步实施滇池入湖污染控制及小流域污染治理提供依据,以滇池环湖28条河流入湖水量及水体中不同形态氮的质量浓度逐月调查数据为基础,研究了滇池河流不同形态氮的入湖浓度(ρ)和入湖负荷的时空变化,并探讨了不同形态氮的入湖负荷贡献. 结果表明:①滇池河流入湖ρ(TN)在2.91～94.01 mg/L之间,以ρ(DIN)(DIN为溶解性无机氮)最高,而ρ(DON)(DON为溶解性有机氮)和ρ(PN)(PN为颗粒态氮)均较低. ②滇池河流氮入湖负荷总量为6 908.47 t/a,绝大多数河流以DIN负荷为主,平均贡献为67.15%；DON和PN入湖负荷贡献相近,平均分别为17.86%和14.99%. ③不同形态氮入湖负荷贡献的季节性差异明显,DIN入湖负荷较高值出现在春夏季(3—9月),平均贡献达74.01%；DON入湖负荷较高值则出现在秋冬季(9月—翌年1月),平均贡献达33.42%；PN入湖负荷贡献月份变化差异较小,最高值出现在2月,贡献为40.19%. ④滇池河流氮入湖负荷不仅要考虑DIN的贡献,也应重视DON和PN负荷,控制滇池河流氮入湖负荷需要考虑不同河流不同形态氮负荷组成及其季节性差异,有针对性地采取相应措施.
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| 关 键 词： | 滇池 河流 氮负荷 时空变化 贡献 |
| 收稿时间： | 2015/11/24 0:00:00 |
| 修稿时间： | 2016/3/14 0:00:00 |
Spatial and Temporal Changes in Nitrogen Loading of Rivers into Dianchi Lake and Contributions of Different Components |
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| LI Le,WANG Haifang,WANG Shengrui,ZHANG Rui,JIAO Lixin,DING Shuai and YU Youjin.Spatial and Temporal Changes in Nitrogen Loading of Rivers into Dianchi Lake and Contributions of Different Components[J].Research of Environmental Sciences,2016,29(6):829-836. |
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| Authors: | LI Le WANG Haifang WANG Shengrui ZHANG Rui JIAO Lixin DING Shuai and YU Youjin |
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| Affiliation: | School of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China ;State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,School of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China and State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China ;Research Center of Lake Eco-Environment, State Environmental Protection Key Laboratory for Lake Pollution Control, Chinese Research Academy of Environmental Sciences, Beijing 100012, China |
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| Abstract: | Abstract: Based on monthly water input data from 28 rivers into Dianchi Lake and nitrogen concentrations, the spatial and temporal changes in nitrogen concentration and loading were revealed in this paper, along with a discussion of the loading contributions of different nitrogen fractions, with a goal of providing scientific support for further control over pollutant input as well as pollution treatment of the small watershed. The results showed:1) the change in total nitrogen (TN) concentration of the rivers running into Dianchi Lake ranged from 2.91-94.01 mg/L, with dissolved inorganic nitrogen (DIN) concentration contributing the most, in contrast to a relatively low percentage of the concentration of dissolved organic nitrogen (DON) and particulate nitrogen (PN). 2) The total volume of TN loading from the rivers into Dianchi Lake reached 6908.47 t/a, with DIN loading contributing the most, averaging 67.15%; the contributions of DON and PN loading were similar, averaging 17.86% and 14.99% respectively. 3) There was a significant difference in seasonal loading contributions of different nitrogen fractions. DIN peaked between March and September, its contribution averaging 74.01%. DON peaked between September and January, its contribution averaging 33.42%. In contrast, there was little difference in monthly PN loading, peaking in February, contributing 40.19%. 4) In terms of nitrogen loading of rivers into Dianchi Lake, not only should DIN contributions be considered, but also DIN and PN loading should be paid great attention to, and at the same time, the components and seasonal differences of the loading of different nitrogen fractions should also be taken into consideration in terms of control over pollution of rivers into Dianchi Lake, to take effective countermeasures. |
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| Keywords: | Dianchi Lake river nitrogen loading spatial and temporal changes contribution |
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