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水坝高流速、大流量泄水伴随的强掺气作用导致下游水体中溶解气体过饱和,致使鱼类患气泡病甚至死亡。而水体中固体介质的存在可以促进过饱和溶解气体的释放,从而减小过饱和气体对鱼类的影响。对此,以活性炭为固体吸附介质,试验研究了介质不同比表面积对过饱和溶解氧释放过程的影响。结果表明,随着活性炭比表面积的增大,其对过饱和溶解氧释放的促进作用显著。研究结果为利用固体介质加快水体内过饱和气体释放提供了科学依据,亦可据此提出工程上减缓过饱和溶解气体对鱼类影响措施。
The high aeration caused by the high flow rate and large discharge of water in the dam leads to the supersaturation of the dissolved gas in the downstream water body, resulting in the blistering and even death of the fish. The existence of solid medium in the water can promote the release of supersaturated dissolved gases, thus reducing the impact of supersaturated gases on fish. In this regard, activated carbon as a solid adsorptive medium, the experimental study of different surface area of the media on the impact of supersaturated dissolved oxygen release process. The results showed that with the increase of specific surface area of activated carbon, it has a significant effect on the release of supersaturated dissolved oxygen. The results provide a scientific basis for using solid media to accelerate the release of supersaturated gas in water, and also propose measures to mitigate the effects of supersaturated dissolved gases on fish.