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首页> 外文期刊>Environmental Science & Technology >Quantifying Lake Water Quality Evolution: Coupled Geochemistry, Hydrodynamics, and Aquatic Ecology in an Acidic Pit Lake
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Quantifying Lake Water Quality Evolution: Coupled Geochemistry, Hydrodynamics, and Aquatic Ecology in an Acidic Pit Lake

机译：量化湖泊水质演变：酸性坑湖中的地球化学，流体动力学和水生生态学耦合

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摘要

Assessment of water quality evolution in the thousands of existing and future mine pit lakes worldwide requires new numerical tools that integrate geochemical, hydrological, and biological processes. A coupled model was used to test alternative hypothesized controls on water quality in a pit lake over ~8 years. The evolution of pH, Al, and Fe were closely linked; field observations were reproduced with generic solubility equilibrium controls on Fe(III) and Al and a commonly reported acceleration of the abiotic Fe(II) oxidation rate by 2-3 orders of magnitude. Simulations indicated an ongoing acidity loading at the site, and the depletion of Al mineral buffering capacity after ~5 years. Simulations also supported the existence of pH limitation on nitrification, and a limitation on phytoplankton growth other than the commonly postulated P and DIC limitations. Furthermore, the model reproduced the general patterns of salinity, pH, Al, and Fe during an uncontrolled river breach in 2011, however, incorporating sediment biogeochemical feedbacks is required to reproduce the observed postbreach internal alkalinity generation in the lake. The modeling approach is applicable to the study of hydrological, geochemical, and biological interactions for a range of lake and reservoir management challenges.
机译：评估全球成千上万个现有和将来的矿井湖泊中水质的演变，需要新的数值工具来整合地球化学，水文和生物过程。使用耦合模型测试了坑池中大约8年以上水质的其他假设假设。 pH，Al和Fe的演变密切相关。通过对Fe（III）和Al的通用溶解度平衡控制以及通常报道的非生物Fe（II）氧化速率的2-3个数量级的加速，再现了现场观察结果。模拟表明现场持续的酸性负荷，〜5年后铝矿物质缓冲能力耗尽。模拟还支持硝化作用中存在pH限制，以及通常假定的P和DIC限制以外对浮游植物生长的限制。此外，该模型再现了2011年不受控制的河流破坏期间盐度，pH，Al和Fe的一般模式，但是，需要结合沉积物生物地球化学反馈来再现在湖中观察到的断口后内部碱度的产生。该建模方法适用于研究一系列湖泊和水库管理挑战的水文，地球化学和生物相互作用。

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  • 来源
    《Environmental Science & Technology》 |2017年第17期|9864-9875|共12页
  • 作者

    S. Ursula Salmon; Matthew R. Hipsey; Geoffrey W. Wake; Gregory N. Ivey; Carolyn E. Oldham;

  • 作者单位

    UWA School of Agriculture and Environment, University of Western Australia, (M087) 35 Stirling Hwy, Crawley, Western Australia, Australia 6009;

    UWA School of Agriculture and Environment, University of Western Australia, (M087) 35 Stirling Hwy, Crawley, Western Australia, Australia 6009;

    School of Civil, Environmental and Mining Engineering, University of Western Australia, (M051) 35 Stirling Hwy, Crawley, Western Australia, Australia 6009;

    School of Civil, Environmental and Mining Engineering, University of Western Australia, (M051) 35 Stirling Hwy, Crawley, Western Australia, Australia 6009;

    School of Civil, Environmental and Mining Engineering, University of Western Australia, (M051) 35 Stirling Hwy, Crawley, Western Australia, Australia 6009;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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