...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Aquatic Sciences >Internal phosphorus loading due to sediment anoxia in shallow areas: implications for lake aeration treatments
【24h】

Internal phosphorus loading due to sediment anoxia in shallow areas: implications for lake aeration treatments

机译：浅地区沉积物缺氧导致的内部磷荷载：对湖泊曝气治疗的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Shallow lake sediments may be anoxic despite overlying aerated water. In the current study, we aimed to ascertain the contribution of shallow areas to internal phosphorus (P) loading due to sediment anoxia in stratifying lakes. Moreover, we analyzed relationships of the key water quality variables with internal P loading due to sediment anoxia originating solely from stratifying areas (IPobs) and that accounting also for the shallow areas (IPpred) for a set of Finnish lakes, including intentionally aerated and non-aerated lakes. Finally, using a broader set of lakes worldwide, we established a specific combination of lake characteristics that predict sediment P release due to sediment anoxia and linked it to the practices of aeration. Our results showed that shallow lake areas (a difference between IPpred and IPobs) contributed about half of the total P flux due to sediment anoxia. While all of the studied water quality variables related significantly to IPpred, only the concentration of total phosphorus (TP) in the near-bottom water layer related significantly to IPobs. This indicates the key importance of P release of shallow areas for water quality. The concentrations of TP in the surface water layer and chlorophyll a were significantly dependent on IPpred irrespectively of the treatment (aerated lakes or not). P supply from shallow areas may affect aeration effectiveness in stratifying lakes. IPpred was found to be dependent on the specific combination of lake characteristics (including mean and maximum depth, lake and catchment area, external P loading) PC3, driven mainly by external P loading. Hence, external load reduction should be considered as the first priority in lake water quality management. By linking the dependence of IPpred on PC3 to aeration practices, we determined the conditions that promise increased effectiveness of aeration treatments.
机译：尽管覆盖着曝气的水，但浅湖沉积物可能是缺氧。在目前的研究中，我们旨在确定浅区域在分层湖泊中由于沉积物缺氧而导致的内磷（P）负荷的贡献。此外，我们分析了由于沉积物缺氧因分层区域（Ipobs）而源于沉积物缺氧而与内部p加载的关键水质变量的关系分析了内部p负荷，并且也为一套芬兰湖泊（Ippred）的浅地区（Ippred），包括有意充气和非 - 湖泊。最后，在全球范围内使用更广泛的湖泊，我们建立了湖泊特征的特定组合，其由于沉积物缺氧而预测沉积物P释放，并将其联系起来给通气的实践。我们的研究结果表明，由于沉积物缺氧，浅湖区（IPPRED和IPOBS之间的差异）贡献了总P助焊剂的一半。虽然所有研究的水质变量与IPPRED有显着相关，但近底水层中的总磷（TP）的浓度显着与IPOB有关。这表明P释放水质的浅区域的关键重要性。地表水层和叶绿素A中的TP浓度显着取决于治疗（曝气湖泊或不存在）的IPpr序列。浅区供应可能会影响分层湖泊的通风效果。发现IPPRED依赖于湖泊特征的特定组合（包括平均和最大深度，湖泊和集水区，外部P加载）PC3，主要由外部P加载驱动。因此，外部负荷减少应被视为湖水质量管理中的第一优先事项。通过将IPPRED对PC3的依赖性联系起来，我们确定了承诺增加曝气治疗效率的条件。

著录项

  • 来源
    《Aquatic Sciences》 |2020年第3期|54.1-54.10|共10页
  • 作者

    Tammeorg Olga; Nurnberg Gertrud; Niemisto Juha; Haldna Marina; Horppila Jukka;

  • 作者单位

    Univ Helsinki Fac Biol & Environm Sci Ecosyst & Environm Res Programme POB 65 Viikinkaari 1 FIN-00014 Helsinki Finland|Estonian Univ Life Sci Ctr Limnol EE-61117 Rannu Estonia;

    Freshwater Res 3421 Hwy 117 Baysville ON P0B 1A0 Canada;

    Univ Helsinki Fac Biol & Environm Sci Ecosyst & Environm Res Programme POB 65 Viikinkaari 1 FIN-00014 Helsinki Finland;

    Estonian Univ Life Sci Ctr Limnol EE-61117 Rannu Estonia;

    Univ Helsinki Fac Biol & Environm Sci Ecosyst & Environm Res Programme POB 65 Viikinkaari 1 FIN-00014 Helsinki Finland;

  • 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

    Internal phosphorus loading; Sediment anoxia; Shallow areas; Aeration;

    机译：内部磷荷载;沉积物缺氧;浅区域;曝气;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号