不同污水排海方式对南通通州湾海域水质的影响

发布时间：2018-07-05 07:11

  本文选题：污水排海 + 水深　； 参考：《海洋环境科学》2017年05期

【摘要】：采用数值模拟的方法,在污水排放规模为10万m3/d,COD浓度为50 mg/L的情况下,计算并分析了24 h连续排放、高潮时至落急、高潮时至低潮时3种排污时段下分别位于-4 m、-6 m、-8 m和-10 m4个水深位置的不同污水排海方式情况下,污染物输移扩散对南通通州湾海域的影响。结果表明,由于水动力条件的不同,不同位置排放口的绝对影响范围也产生变化,且随着水深的增加,水交换能力越强,污染物影响范围越小;在排放总量一定的情况下,不同时段排放时,污染物影响范围也不同,24 h连续排放对水环境影响最小,高潮时到落急、高潮时至低潮时时段排放时一定程度上控制了高浓度污染物扩散对近海海域的影响。
[Abstract]:With the numerical simulation method, under the condition that the effluent discharge scale is 100000 m3 / dl and the COD concentration is 50 mg / L, the 24 h continuous discharge is calculated and analyzed. The effects of pollutant transport and diffusion on Tongzhou Bay, Nantong under the conditions of different sewerage modes, which are located at four water depths of -4 m ~ (-6) m ~ (-8 m) and -10 m ~ (4) water depth, respectively, from high tide to low tide. The results show that, because of the different hydrodynamic conditions, the absolute influence range of the discharge outlet at different locations also changes, and with the increase of water depth, the stronger the water exchange capacity, the smaller the impact range of pollutants. At different periods of time, the influence range of pollutants on water environment is the least in 24 h continuous discharge, and the influence of high concentration pollutant diffusion on offshore waters is controlled to a certain extent during the period from high tide to low tide.
【作者单位】： 河海大学海岸灾害及防护教育部重点实验室;河海大学环境海洋实验室;南京师范大学虚拟地理环境教育部重点实验室;南京师范大学江苏省地理环境演化国家重点实验室培育建设点;南京师范大学江苏省地理信息资源开发与利用协同创新中心;
【基金】：国家自然科学基金项目(41276017)
【分类号】：X55;X703
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本文编号：2099420