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丹江口水库流域氮素时空分布特征
引用本文:朱媛媛,刘琰,周北海,江秋枫,吴德文.丹江口水库流域氮素时空分布特征[J].中国环境监测,2016,32(2):50-57.
作者姓名:朱媛媛  刘琰  周北海  江秋枫  吴德文
作者单位:北京科技大学土木与环境工程学院环境工程系, 北京 100083;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, 国家环境保护饮用水水源地保护重点实验室, 北京 100012,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, 国家环境保护饮用水水源地保护重点实验室, 北京 100012,北京科技大学土木与环境工程学院环境工程系, 北京 100083,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, 国家环境保护饮用水水源地保护重点实验室, 北京 100012,湖北省十堰市环境保护监测站, 湖北 十堰 442000
摘    要:为全面了解丹江口水库流域氮素污染状况,对库区26个点位及10条主要入库河流入库口处的表层水样进行了丰水期、平水期、枯水期采样与监测,探讨了氮素时空分布特征。入库口总氮检出范围为1.31~10.96 mg/L,其中泗河和神定河入库口总氮最高。总氮为库区水质主要限制因子,年均总氮质量浓度为1.13~2.71 mg/L;汉江库区整体上总氮污染水平略高于丹江库区,且与丹江库区相比,汉江库区受点源排放的影响较大。10条入库河流总氮的总年均输入量为63 347.31 t/a,其中汉江的总氮输入量最大;入库河流总氮控制的关键在于溶解性有机氮和硝酸盐氮的控制。

关 键 词:丹江口水库  主要河流  氮素  时空变化
收稿时间:2015/4/17 0:00:00
修稿时间:2015/7/24 0:00:00

The Temporal and Spatial Distribution of Nitrogen in Danjiangkou Reservoir Watershed
ZHU Yuanyuan,LIU Yan,ZHOU Beihai,JIANG Qiufeng and WU Dewen.The Temporal and Spatial Distribution of Nitrogen in Danjiangkou Reservoir Watershed[J].Environmental Monitoring in China,2016,32(2):50-57.
Authors:ZHU Yuanyuan  LIU Yan  ZHOU Beihai  JIANG Qiufeng and WU Dewen
Institution:Department of Environmental Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing 100012, China,Department of Environmental Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China,State Key Laboratory of Environmental Criteria and Risk Assessment, State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing 100012, China and Shiyan Environmental Protection Monitoring Station, Shiyan 442000, China
Abstract:In order to investigate the pollution characteristic of nitrogen in Danjiangkou Reservoir watershed, surface water at 26 sampling sites in the reservoir area and 10 sampling sites in the main tributaries were collected and analyzed in different seasons. The concentrations of total nitrogen (TN) are in the range of 1.31-10.96 mg/L for the main tributaries, and the concentrations of TN in Sihe River and Shendinghe River are obviously higher than that in other rivers. TN is the limit factor for the water quality in Danjiangkou Reservoir, and the annual average concentration of TN is 1.13-2.71 mg/L. Generally, the concentration of TN in the reservoir area in Hanjiang watershed (HK) is higher than that in the reservoir area in Danjiang watershed (DK), and compared with DK, the HK is strongly influenced by the discharge of point sources. The annual average input amount of TN from 10 tributaries is 63 347.31 t, and among the 10 tributaries, Hanjiang River has a biggest contribution for inputting of TN. The result of nitrogen forms analysis shows that the key to control TN in tributaries is to control the input of dissolved organic nitrogen (DON) and nitrate-nitrogen.
Keywords:Danjiangkou reservoir  main tributaries  Nitrogen forms  spatial-temporal changes
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