| 蓄水期三峡水库香溪河沉积物-水系统营养盐分布特征 |
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| 引用本文： | 苏青青,刘德富,纪道斌,宋林旭,崔玉洁,李欣,陈秀秀,刘心愿. 蓄水期三峡水库香溪河沉积物-水系统营养盐分布特征[J]. 环境科学, 2018, 39(5): 2135-2144 |
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| 作者姓名： | 苏青青 刘德富 纪道斌 宋林旭 崔玉洁 李欣 陈秀秀 刘心愿 |
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| 作者单位： | 三峡大学水利与环境学院;三峡大学三峡库区生态环境教育部工程研究中心;湖北工业大学河湖生态修复与藻类利用湖北省重点实验室;宣州区水务局 |
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| 基金项目： | 国家自然科学基金重大计划项目（91647207）；国家自然科学基金项目（51509086）；国家国际科技合作项目（2014DFE70070）；国家水体污染控制与治理科技重大专项（2014ZX07104-005-02）；国家重点研发计划项目（2016YFC0402204） |
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| 摘 要： | 为研究蓄水期香溪河沉积物-水系统中氮磷营养盐的分布特征,于2016年在香溪河布点采样,分析沉积物-水系统氮、磷及有机质含量,探讨沉积物间隙水和上覆水营养盐"源-汇"特征,并对采样点位进行了聚类分析.结果表明,沉积物中ρ(TN)在河口处含量较高,在中下游区域较接近;ρ(TP)在上游区域明显高于中下游及河口;ρ(O.M.)呈现下游高上游低的分布特征,且各采样点在深度10cm的范围内,ρ(O.M.)的最大值超过了临界点(1.5%),存在一定的释放风险.上覆水的分布上,ρ(DTN)和ρ(DTP)均在干支流交汇处最大,且ρ(DTN)从河口至上游沿程递减,ρ(DTP)沿程变化不大,而间隙水中ρ(DTN)和ρ(DTP)的分布和上覆水体相反,在上游处最大,并从上游向河口处递减.研究期间5个采样点位的DTN、NH_4~+-N、DTP(除CJ点位外)均以"源"的方式向上覆水释放营养盐,而NO_3~--N和PO_4~(3-)-P则是一部分点位呈现为"源",一部分点位呈现为"汇",且氮素的"源-汇"过程较磷素更为强烈,这是因为蓄水期底部的氧化环境和干流水体的倒灌潜入深度和方式差异所致.结合聚类分析结果发现对于沉积物-水系统,CJ、1号、2号采样点特征相近,而3号和4号采样点特征相近.
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| 关 键 词： | 三峡水库 香溪河 蓄水期 沉积物-水系统 氮磷营养盐 |
| 收稿时间： | 2017-08-20 |
| 修稿时间： | 2017-11-05 |
Nutrient Distribution Characteristics of the Sediment-water System in the Xiangxi River During the Impoundment of TGR |
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| SU Qing-qing,LIU De-fu,JI Dao-bin,SONG Lin-xu,CUI Yu-jie,LI Xin,CHEN Xiu-xiu and LIU Xin-yuan. Nutrient Distribution Characteristics of the Sediment-water System in the Xiangxi River During the Impoundment of TGR[J]. Chinese Journal of Environmental Science, 2018, 39(5): 2135-2144 |
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| Authors: | SU Qing-qing LIU De-fu JI Dao-bin SONG Lin-xu CUI Yu-jie LI Xin CHEN Xiu-xiu LIU Xin-yuan |
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| Affiliation: | College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Ecoenvironment in Three Gorges Reservoir Region, Ministry of Education, Three Gorges University, Yichang 443002, China,Hubei Key Laboratory of Ecological Restoration of River-lakes and Algal Utilization, Hubei University of Technology, Wuhan 430068, China,College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Ecoenvironment in Three Gorges Reservoir Region, Ministry of Education, Three Gorges University, Yichang 443002, China,College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Ecoenvironment in Three Gorges Reservoir Region, Ministry of Education, Three Gorges University, Yichang 443002, China,College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Ecoenvironment in Three Gorges Reservoir Region, Ministry of Education, Three Gorges University, Yichang 443002, China,College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Ecoenvironment in Three Gorges Reservoir Region, Ministry of Education, Three Gorges University, Yichang 443002, China,Water Authority of Xuanzhou District, Xuancheng 242000, China and College of Hydraulic & Environmental Engineering, China Three Gorges University, Yichang 443002, China;Engineering Research Center of Ecoenvironment in Three Gorges Reservoir Region, Ministry of Education, Three Gorges University, Yichang 443002, China |
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| Abstract: | |
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| Keywords: | Three Gorges Reservoir Xiangxi River impoundment period sediment-water system nitrogen and phosphorus nutrients |
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