洋河水库泄洪对近岸海域水质的影响

发布时间：2018-03-25 02:25

本文选题：水库泄洪　切入点：近岸海域　出处：《海洋环境科学》2017年03期

【摘要】：基于验证良好的秦皇岛河流-海岸一二维耦合数学模型,探讨了洋河水库泄洪对近岸海域水质的影响。由于水库COD浓度略高于近岸海域COD标准浓度,但远低于河道水体COD浓度,水库开闸放水初期,河口海域COD日平均浓度和超标面积较泄洪前有所增大,此后随着水库的不断泄洪,海域COD日平均浓度和超标面积逐渐减小,最终趋于稳定,海域水质较泄洪前得到明显改善。在相同水库放水COD浓度下,泄量越大,携带水库下游河道的污染物入海越多,海域COD日平均浓度超标面积越大,且泄量与超标面积间服从线性函数关系。在污染物入海通量相同的情况下,减小污染物入海浓度在一定程度上可以改善近岸海域水质状况。
[Abstract]:Based on the well-verified coupled mathematical model of river and coast in Qinhuangdao, the effect of flood discharge of Yanghe reservoir on the water quality of coastal waters is discussed. The COD concentration of the reservoir is slightly higher than the standard concentration of COD in the coastal waters, but far lower than the COD concentration of the river water body. At the initial stage of opening and discharging of reservoir, the daily average concentration and excess area of COD in estuarine area are increased compared with those before flood discharge. After that, with the flood discharge of reservoir, the daily average concentration and excess area of COD gradually decrease, and finally tend to be stable. The water quality in the sea area is obviously improved compared with that before flood discharge. Under the same COD concentration, the larger the discharge volume, the more pollutants are carried into the sea, and the larger the daily average COD concentration exceeds the standard area, the more pollutants are carried into the sea. In the case of the same flux of pollutants into the sea, reducing the concentration of pollutants into the sea can improve the water quality in the coastal waters to a certain extent.
【作者单位】：上海海洋大学海洋科学学院;浙江省水利河口研究院;中交疏浚技术装备国家工程研究中心有限公司;同济大学土木工程学院水利工程系;河北省海洋环境监测中心;
【基金】：海洋公益性行业科研专项(201305003-5) 河北省国土资源厅科技项目
【分类号】：X55

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