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滇池河流氮入湖负荷时空变化及形态组成贡献

李乐 王海芳 王圣瑞 张蕊 焦立新 丁帅 余佑金

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.
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.
LI Le, WANG Haifang, WANG Shengrui, ZHANG Rui, JIAO Lixin, DING Shuai, 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.
Citation: LI Le, WANG Haifang, WANG Shengrui, ZHANG Rui, JIAO Lixin, DING Shuai, 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.

滇池河流氮入湖负荷时空变化及形态组成贡献

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)

Spatial and Temporal Changes in Nitrogen Loading of Rivers into Dianchi Lake and Contributions of Different Components

  • 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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  • 收稿日期:  2015-11-24
  • 修回日期:  2016-03-14
  • 刊出日期:  2016-06-25

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