| 灌河下游营养盐浓度的季节变化及其入海通量研究 |
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| 引用本文： | 刘静,杨福霞,王俊杰,姚庆祯.灌河下游营养盐浓度的季节变化及其入海通量研究[J].中国海洋大学学报(自然科学版),2021(5). |
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| 作者姓名： | 刘静 杨福霞 王俊杰 姚庆祯 |
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| 作者单位： | 中国海洋大学海洋化学理论与工程技术教育部重点实验室;中国海洋大学化学化工学院 |
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| 基金项目： | NSFC-山东省联合基金项目(U1906210);中央高校基本科研业务费重大培育项目(201822006)资助。 |
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| 摘 要： | 2017年2月~2019年9月在灌河下游采集水样,分析了其中各种形态营养盐的浓度以及月动态变化情况,估算了灌河的营养盐入海通量。结果表明,NO3-和NH4+是溶解无机氮(DIN)的主要存在形式,其平均值分别为(74.66±45.06)、(83.67±87.22)μmol/L。NO3-浓度与欧洲以及国内一些河流相当,NH4+浓度显著高于世界上其它河流。PO43-的平均浓度为(3.38±2.14)μmol/L,显著高于世界河流的平均水平(0.32μmol/L),与欧洲和北美地区富营养化严重的河流相当。SiO32-的平均浓度为(80.27±27.65)μmol/L,同国内及世界上其它河流相比,该含量处于较低水平。不同形态氮、磷浓度存在显著的季节变化,从2017—2019年它们的浓度显著降低,这主要是由于环保督察后大量畜禽养殖场的关闭或迁移使得排放入河的各形态氮、磷大量减少所致;硅浓度的年际变化不大。灌河每年约有0.61×104 t的DIN和0.28×103 t的PO33-进入南黄海,SiO32-的年输送通量约为0.60×104t。
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| 关 键 词： | 灌河 营养盐 浓度 通量 |
Seasonal Variation and Fluxes of Nutrients in the Lower Reaches of the Guanhe River |
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| LIU Jing,YANG Fu-Xia,WANG Jun-Jie,YAO Qing-Zhen.Seasonal Variation and Fluxes of Nutrients in the Lower Reaches of the Guanhe River[J].Periodical of Ocean University of China,2021(5). |
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| Authors: | LIU Jing YANG Fu-Xia WANG Jun-Jie YAO Qing-Zhen |
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| Institution: | (Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China) |
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| Abstract: | Water samples were collected from the low reaches of the Guanhe River to determine the concentrations of nutrients.The variations and fluxes of nutrients were studied.The result showed that nitrate(NO3-)and ammonia(NH4+)was the predominant species of DIN in the Guanhe River,with average values of(74.7±45.1)and(83.7±87.2)μmol/L,respectively.The concentration of NO3-is similar to that of some rivers in European countries and China,and the concentration of NH4+ is significantly higher than that of some other rivers in the world.The average concentration of PO43- is(3.38±2.14)μmol/L,which was significantly higher than the average level,and is comparable to the rivers with severe eutrophication in Europe and North America.The average concentration of SiO32- is(80.27±27.65)μmol/L.Compared with the other rivers in the world,the concentration of SiO32- is at a lower level.There are significant seasonal changes in the concentrations of nitrogen and phosphorus in various forms,and their concentrations are significantly reduced from 2017 to 2019.This is mainly due to the closure or migration of a large number of livestock and poultry farms after environmental protection inspections,and the reduction of various forms of nitrogen and phosphorus discharged into the river.The annual variations in silicate concentration are not significant.The Guanhe River input about 0.61×104t/a of DIN and 0.28×103t/a of PO43- to the South Yellow Sea,and the annual transport flux of SiO32- is about 0.60×104t. |
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| Keywords: | Guanhe River nutrients concentration flux |
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