| 蓄水前后三峡库区香溪河沉积物磷形态分布特征及释放通量估算 |
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| 引用本文： | 刘心愿,宋林旭,纪道斌,刘德富,李欣,黄佳维,赵冲,唐咏春,平明明.蓄水前后三峡库区香溪河沉积物磷形态分布特征及释放通量估算[J].环境科学,2018,39(9):4169-4178. |
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| 作者姓名： | 刘心愿 宋林旭 纪道斌 刘德富 李欣 黄佳维 赵冲 唐咏春 平明明 |
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| 作者单位： | 三峡大学水利与环境学院;湖北工业大学河湖生态修复及藻类利用湖北省重点实验室 |
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| 基金项目： | 国家自然科学基金重大项目（91647207）；国际科技合作与交流专项项目（2014DFE70070）；国家自然科学基金青年科学基金项目（51509086）；国家自然科学基金项目（51779128，41501297）；国家水体污染控制与治理科技重大专项（2014ZX07104-005-02） |
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| 摘 要： | 三峡库区汛末蓄水过程改变了支流库湾沉积物赋存环境,继而影响沉积物磷形态的分布特征和沉积物-水界面过程.本文通过对2016年8月(蓄水前)和10月(蓄水后)香溪河库湾沉积物和上覆水样品的采集分析,分析了蓄水前后库区干流和支流库湾底部沉积物磷形态分布特征及赋存的环境条件,估算了沉积物-水界面PO3-4-P交换通量.结果表明:蓄水后沉积物上覆水pH增加,碱性增强;Eh减少,还原性增强.沉积物中各形态磷相对含量由Na OH-PHCl-POP转变为HCl-POPNa OH-P,沉积环境的改变是磷形态变化的根本原因.沉积物中TP增加了1.3倍,上覆水ρ(PO3-4-P)是蓄水前3.7倍,间隙水ρ(PO3-4-P)是蓄水前8.3倍,增加了香溪河库湾沉积物营养盐释放风险.蓄水前后香溪河沉积物PO3-4-P总体均表现为"源",但PO3-4-P扩散通量由蓄水前的-0.002 9~0.005 9 mg·(m~2·d)~(-1)增加为蓄水后的0.006 7~0.107 1 mg·(m~2·d)~(-1),蓄水后香溪河库湾底部沉积物磷释放量增加.
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| 关 键 词： | 三峡库区 香溪河 沉积物 磷 释放通量 |
| 收稿时间： | 2017/11/20 0:00:00 |
| 修稿时间： | 2018/3/2 0:00:00 |
Distribution Characteristics and Release Fluxes of Phosphorus Forms in Xiangxi Bay Sediments in the Three Gorges Reservoir Before and After Impoundment |
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| LIU Xin-yuan,SONG Lin-xu,JI Dao-bin,LIU De-fu,LI Xin,HUANG Jia-wei,ZHAO Chong,TANG Yong-chun and PING Ming-ming.Distribution Characteristics and Release Fluxes of Phosphorus Forms in Xiangxi Bay Sediments in the Three Gorges Reservoir Before and After Impoundment[J].Chinese Journal of Environmental Science,2018,39(9):4169-4178. |
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| Authors: | LIU Xin-yuan SONG Lin-xu JI Dao-bin LIU De-fu LI Xin HUANG Jia-wei ZHAO Chong TANG Yong-chun and PING Ming-ming |
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| Institution: | College of Hydraulic and Environmental Engineering, Three Gorges University, Yichang 443002, China,College of Hydraulic and Environmental Engineering, Three Gorges University, Yichang 443002, China,College of Hydraulic and Environmental Engineering, 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 and Environmental Engineering, Three Gorges University, Yichang 443002, China,College of Hydraulic and Environmental Engineering, Three Gorges University, Yichang 443002, China,College of Hydraulic and Environmental Engineering, Three Gorges University, Yichang 443002, China,College of Hydraulic and Environmental Engineering, Three Gorges University, Yichang 443002, China and College of Hydraulic and Environmental Engineering, Three Gorges University, Yichang 443002, China |
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| Abstract: | |
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| Keywords: | Three Gorges Reservoir Xiangxi Bay sediment phosphorus diffusive flux |
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