摘要
通过采用平面二维水动力水质模型,以CODMn作为污染指标用来模拟灌河口近岸海域COD浓度的变化情况及污染物的迁移扩散规律,并利用实测资料对模拟结果进行验证。研究结果表明,水动力模拟的结果能满足污染物扩散的水动力条件,水质模块计算的结果也能真实的反映灌河口COD的浓度变化状况。在一个潮周期内,污染物的扩散受潮流的影响较大,落潮阶段污染物的扩散作用较涨潮阶段明显,落潮阶段COD浓度范围大,浓度梯度小,涨潮阶段与之相反。COD浓度的高值区在落潮阶段位于燕尾港附近,涨潮时则迁移至河道内,且落憩时浓度高值区的范围较涨憩时大,浓度值也较高。
Based on the two-dimensional hydrodynamic and water quality model,using CODMn as pollution index to simulate the changes of COD concentration and the law of transportation and diffusion of pollutants in the Guanhe Estuary,after the simulation,the result will be varified by the measure data.The results show that the simulation of hydrodynamics can meet the hydrodynamic of transportation and diffusion of pollutants,the calculation of water quality model can also reflect COD concentration changes in the Guanhe Estuary.In a tidal period,the transportation of pollutants directly related by the tidal current,during the ebb phase,the COD concentration range is wider and the concentration gradient is narrower than the flood phase.The high value area is located in Yanwei Port during the ebb phase,but during the flood phase,the area is transport to inner river,and in intidal ebb the area is more larger than in tidal flood.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2013年第3期381-385,共5页
Marine Environmental Science
基金
江苏海涂围垦关键技术研究与应用示范(201205005)
海洋公益性行业科研专项经费项目(200805065)
教育部高等学校博士学科点专项科研基金(200802940014)
关键词
灌河口
二维水动力水质模型
污染指标
污染物扩散
the Guanhe Estuary
two-dimensional hydrodynamic and water quality model
pollution index
transportation of pollutants
