[1]时 瑶,赵艳民,秦延文,等.三峡水库不同调度期水体氮形态时空分布特征[J].水土保持研究,2021,28(06):9-16.
　SHI Yao,ZHAO Yanmin,QIN Yanwen,et al.Spatiotemporal Distribution of Nitrogen Forms in Water in Different Scheduling Periods of the Three Gorges Reservoir[J].Research of Soil and Water Conservation,2021,28(06):9-16.
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三峡水库不同调度期水体氮形态时空分布特征

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 28 期数: 2021年06期 页码: 9-16 栏目: 出版日期: 2021-10-10
Title:
Spatiotemporal Distribution of Nitrogen Forms in Water in Different Scheduling Periods of the Three Gorges Reservoir
文章编号:
1005-3409(2021)06-0009-08
作者:
时 瑶1,2，赵艳民1,2，秦延文1,2，马迎群1,2，韩超南3，张 雷1,2，杨晨晨1,2，刘志超1,2
(1.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; 2.中国环境科学研究院 水环境管理研究室，北京 100012; 3.南京林业大学 土木工程学院，南京 210037)
Author(s):
SHI Yao1,2，ZHAO Yanmin1,2，QIN Yanwen1,2，MA Yingqun1,2，HAN Chaonan3，ZHANG Lei1,2，YANG Chenchen1,2，LIU Zhichao1,2
(1.State Key Laboratory of Environmental Criteria and Risk Assessment，Chinese Research Academy of Environmental Sciences，Beijing 100012，China; 2.Water Environmental Management and Research Center，Chinese Research Academy of Environmental Sciences，Beijing 100012，China; 3.School of Civil Engineering，Nanjing Forestry University，Nanjing 210037，China)
关键词:
三峡水库;  氮形态;  水库调度期;  空间分布;  季节分布
Keywords:
Three Gorges Reservoir;  nitrogen forms;  reservoir scheduling periods;  spatial distribution;  seasonal distribution
分类号:
X524
文献标志码:
A
摘要:
为了深入探究三峡水库氮形态污染特征，采用野外调查和室内实验相结合的方法，系统分析了三峡水库4个调度期8个断面的水质监测数据，对水体氮形态浓度和时空分布特征和氮形态之间及其与水体环境因子之间的相关性进行了研究。结果表明:TN-N浓度范围为1.45～5.34 mg/L，超过国际公认的发生富营养化阈值，其主要形态为TDN-N，TDN-N主要形态为DIN-N，DIN-N主要形态为NO-3-N，氮形态分布受水体pH值和EC的影响较为显著。蓄水期、低水位期和泄水期TN-N，TDN-N，NO-3-N两两之间显著正相关，三者具有一定的同源性。空间上，4个调度期TN-N，TDN-N，NO-3-N沿程分布趋势相似，从朱沱至寸滩整体呈先升后降的趋势; NH+4-N和NO-2-N变化幅度不大，空间差异可能主要受人类活动污染输入影响。季节上，TN-N，TDN-N，NO-3-N，NH+4-N变化趋势相似，表现为“高水位期>低水位期”，NO-2-N表现相反。季节变化可能主要与水库调度运行模式和气温、降雨等季节性因素有关。
Abstract:
In order to explore the pollution characteristics of nitrogen form in the Three Gorges Reservoir，a combination of field surveys and laboratory experiments was used to systematically analyze the water quality monitoring data of eight sections of the Three Gorges Reservoir in four scheduling periods. The concentration and spatiotemporal distribution characteristics of different nitrogen forms were studied，and the correlations between different nitrogen forms and environmental factors were also studied in four scheduling periods of the Three Gorges Reservoir. The results indicated that the concentration of TN-N in water of the Three Gorges Reservoir were 1.45～5.34 mg/L，which exceeded the internationally recognized threshold level of eutrophication，TDN-N was the main chemical species of TN-N，DIN-N was the main chemical species of TDN-N，NO-3-N was the main chemical species of DIN-N; the distribution of nitrogen forms was significantly affected by pH value and EC of the water; significant positive correlations among TN-N，TDN-N and NO-3-N were found during the storage period，low water level period，and drainage period of the Three Gorges Reservoir，indicating that TN-N，TDN-N and NO-3-N might share the same source; similar patterns of spatial distribution in water were observed for TN-N，TDN-N and NO-3-N，and an upward trend and then a downward trend were found from the upstream Zhutuo section to Cuntan section; ammonium nitrogen(NH+4-N)and nitrite nitrogen(NO-2-N)did not show significant change; spatial differences might be mainly attributed to the pollution input by human activities; similar patterns of seasonal distribution in water were observed for TN-N，TDN-N，NO-3-N and NH+4-N，showing the following decreasing order: high water level period>low water level period; seasonal trend of NO-2-N was shown as the opposite. The seasonal changes might be mainly related to the operation mode of reservoir and seasonal factors such as temperature and rainfall.

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备注/Memo

收稿日期:2020-10-26 修回日期:2020-12-07
资助项目:国家重点研发计划项目“三峡水库运行背景下水污染综合调控模式研究”(2017YFC0404702)
第一作者:时瑶(1982—)，女，山东日照人，硕士，工程师，主要从事流域水环境科学研究。E-mail:shiyao0204@163.com
通信作者:秦延文(1973—)，女，山东青岛人，博士，研究员，主要从事流域水环境风险评估预警研究。E-mail:qinyw@craes.org.cn

更新日期/Last Update: 2021-10-10