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首页> 外文期刊>Aquatic Sciences >Study on the mechanism of the influence of flood storage at the end of the Three Gorges Reservoir on the phosphorus forms in the sediments of the tributary reservoir bay
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Study on the mechanism of the influence of flood storage at the end of the Three Gorges Reservoir on the phosphorus forms in the sediments of the tributary reservoir bay

机译：三峡库区末端洪水储存对磷形态沉积物沉积物的影响力的研究

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摘要

This paper studies the influence of the impounding process during flood recession in the TGR on the distribution and rerelease of sediment phosphorus forms in the Xiangxi Bay in 2016. Influenced by the main stream of the Three Gorges Reservoir (TGR) flowing backward during impoundment, the water environmental conditions, sediment grain size and sediment-forming environment of the tributary bays change correspondingly. In this study, it is found that the water temperature (WT), turbidity and oxidation-reduction potential (ORP) of the overlying water in the Xiangxi Bay decrease, while the pH increases after impoundment in the TGR. The backward flow of the main stream containing a large amount of sediments increases the sediment content of the tributary bay, and the difference in sediment particle size between the main stream and tributaries narrows after resedimentation. The phosphorus adsorbed on the sediments increases the total phosphorus (TP) in the sediments of the Xiangxi River to 1.3 times its value before water impoundment. NaOH-P and HCl-P in the Xiangxi River sediments account for 42% and 38% of the TP, respectively, and the contents of the various phosphorus forms are ranked in the following order: NaOH-P HCl-P organic phosphorus (OP). After impoundment, HCl-P accounts for 67% of the TP, and the relative contents of the phosphorus forms are ranked as: HCl-P OP NaOH-P. Orthophosphate (PO43--P) in the Xiangxi sediments before and after impoundment acts as a source, and the PO43--P diffusion flux increases from approximately - 0.0029 to 0.0059 mg (m(2) d)(-1) before impoundment to 0.0067-0.1071 mg (m(2) d)(-1) after impoundment, which is mainly due to the increased difference in concentration of PO43--P [rho(PO43--P)] between the sediment interstitial water and overlying water after impoundment. After nutrient recharge of the main stream of the Yangtze River, rho(PO43--P) of the overlying water is 3.7 times its value before impoundment, and after the release of NaOH-P in the sediments, rho(PO43--P) of the interstitial water is 8.3 times its value before water impoundment. Hence, the risk of nutrient release from the sediments in the Xiangxi Bay increases.
机译：本文研究了2016年湘西湾沉积物磷磷磷的分布和重新升放沉积物中蓄水过程中蓄水过程的影响。受三峡库区主流的影响（TGR）在蓄水期间向后流动，水环境条件，沉积物粒度和沉积物形成的支流托架相应地改变。在这项研究中，发现湘西湾的水温（WT），覆盖水中的水温，浊度和氧化还原电位（ORP）减少，而TGR中蓄水后的pH值增加。含有大量沉积物的主流的向后流动增加了支流湾的沉积物含量，并且在分析后主流和支流之间的沉积物粒度差异差异。吸附在沉积物上的磷将湘西沉积物中的总磷（TP）增加到水蓄水前的1.3倍。湘西河沉积物中的NaOH-P和HCl-P分别占TP的42％和38％，并且各种磷形式的内容物按以下顺序排列：NaOH-P> HCl-P>有机磷（OP）。在蓄水后，HCl-P占TP的67％，并且磷形式的相对含量被评为：HCl-P> OP> NaOH-P。蓄水前后Xiangxi沉积物中的正磷酸盐（PO43 - P）作为源，并且PO43-P扩散通量从蓄水前从大约 - 0.0029至0.0059mg（m（2）d）（ - 1）增加到蓄水后0.0067-0.1071mg（m（2）d）（ - 1），这主要是由于沉积间质水和覆盖水之间的PO43 - P [rho（PO43 - P）的浓度差异增加蓄水后。在长江的主要流的营养补给后，覆盖水的Rho（PO43 - P）是蓄水前的3.7倍，并且在沉积物中释放Naoh-P后，Rho（PO43 - P）在水蓄水前的间质水是其价值的8.3倍。因此，湘西湾沉积物中营养释放的风险增加。

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  • 来源
    《Aquatic Sciences》 |2020年第2期|46.1-46.13|共13页
  • 作者

    Liu Xinyuan; Pan Baozhu; Song Linxu; Yang Zhengjian; Ji Daobin; Cui Yujie; Su Qingqing;

  • 作者单位

    Xian Univ Technol State Key Lab Ecohydraul Northwest Arid Reg China Xian 710048 Shaanxi Peoples R China;

    Xian Univ Technol State Key Lab Ecohydraul Northwest Arid Reg China Xian 710048 Shaanxi Peoples R China;

    China Three Gorges Univ Engn Res Ctr Ecoenvironm Three Gorges Reservoir R Minist Educ Yichang 443002 Peoples R China;

    China Three Gorges Univ Engn Res Ctr Ecoenvironm Three Gorges Reservoir R Minist Educ Yichang 443002 Peoples R China;

    China Three Gorges Univ Engn Res Ctr Ecoenvironm Three Gorges Reservoir R Minist Educ Yichang 443002 Peoples R China;

    China Three Gorges Univ Engn Res Ctr Ecoenvironm Three Gorges Reservoir R Minist Educ Yichang 443002 Peoples R China;

    China Three Gorges Univ Engn Res Ctr Ecoenvironm Three Gorges Reservoir R Minist Educ Yichang 443002 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Impoundment; Three gorges reservoir; Sediment; Phosphorus form; Diffusion flux;

    机译：蓄水;三峡库;沉积物;磷形式;扩散通量;

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