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Impacts of blending on dilution of negatively buoyant brine discharge in a shallow tidal sea

机译:混合对浅潮海负浮性盐水排放物稀释的影响

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摘要

A fine-resolution three-dimensional hydrodynamic model is applied to study the dilution of desalination brine discharged into a tidal sea. Based on given inflow rate and salinity excess of discharge brine, this study explores variations in mid-field dilutions when other low-salinity wastewater is added to the discharge. Findings reveal that this blending leads to a decrease in dilution in the mixing zone and therefore to higher levels of pollutants in this zone, while, on the other hand, the mixing zone occupies a smaller area. The reason is that the discharge of brine creates a density-driven flow that operates to partially remove effluent from the discharge location. This removal is less efficient for the decrease in density excess of the discharge. Hence, in an ambient sea of moderate mixing, blending can be expected to increase the risk of marine pollution in the mixing zone.
机译:应用精细分辨率的三维流体动力学模型来研究排入潮汐海域的淡化盐水的稀释度。基于给定的入水流量和排盐盐水的盐分过量,本研究探讨了当向排污物中添加其他低盐度废水时中场稀释度的变化。研究结果表明,这种混合会导致混合区域中稀释度的降低,从而导致该区域中污染物的含量较高,而另一方面,混合区域所占面积较小。原因是盐水的排放会产生密度驱动的流量,该流量可部分排出排放位置的污水。这种去除对于减少放电密度过量的效率较低。因此,在适度混合的环境海中,可以预期混合会增加混合区海洋污染的风险。

著录项

  • 来源
    《Marine pollution bulletin》 |2009年第7期|1032-1038|共7页
  • 作者

    Jochen Kaempf;

  • 作者单位

    School of Chemistry, Physics and Earth Sciences, Flinders University, Adelaide, P.O. Box 2100, Adelaide SA 5001, Australia;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    seawater desalination; dilution; marine impacts; hydrodynamic modeling;

    机译:海水淡化稀释;海洋影响;水动力模型;

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