Kämpf Jochen
School of Chemistry, Physics and Earth Sciences, Flinders University, Adelaide, P.O. Box 2100, Adelaide SA 5001, Australia.
Mar Pollut Bull. 2009 Jul;58(7):1032-8. doi: 10.1016/j.marpolbul.2009.02.009. Epub 2009 Mar 20.
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.
应用高分辨率三维水动力模型研究排入潮汐海的淡化盐水的稀释情况。基于给定的入流速率和排放盐水的盐度超标情况，本研究探讨了在排放中添加其他低盐度废水时中场稀释的变化。研究结果表明，这种混合导致混合区内的稀释度降低，从而导致该区域内污染物水平升高，而另一方面，混合区所占面积较小。原因是盐水排放产生了密度驱动流，该流的作用是将部分废水从排放位置带走。这种带走对于排放中密度超标的降低效率较低。因此，在中等混合程度的环境海水中，预计混合会增加混合区内海洋污染的风险。
