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河流中污染源垂向紊动混合过程研究
引用本文:杜彦良,褚君达.河流中污染源垂向紊动混合过程研究[J].水科学进展,2003,14(3):318-322.
作者姓名:杜彦良  褚君达
作者单位:河海大学环境水利研究所, 江苏, 南京, 210098
摘    要:着重研究了河流中点源及线源污染物的垂向紊动混合过程.根据大江河中污染物在排放口近区范围内的垂向紊动混合过程,提出了部分均匀混合水深的新概念,建立了点源及线源的垂向紊动混合过程基本方程.通过求解方程,得到部分均匀混合水深随纵向距离变化的基本规律和全水深垂向均匀混合距离的理论公式,且用相关实测资料进行了验证.将所建立的垂向紊动混合过程基本规律引入数值模型中,建立了部分均匀混合水深平均二维水质模型,并用现场罗丹明示踪实测资料进行验证,表明该模型较传统的全水深平均模型在近区具有更高的计算精度,与三维模型相比则有更高的计算效率.

关 键 词:河流污染    污染源    垂向紊动混合过程    部分均匀混合水深    垂向均匀混合距离    二维水质模型
文章编号:1001-6791(2003)03-318-05
收稿时间:2002-02-04
修稿时间:2002年2月4日

Vertical turbulent mixing process of sewage in nature rivers
DU Yan-liang,CHU Jun-da.Vertical turbulent mixing process of sewage in nature rivers[J].Advances in Water Science,2003,14(3):318-322.
Authors:DU Yan-liang  CHU Jun-da
Institution:Institute of Environmental Water Sciences, Hohai University, Nanjing 210098, China
Abstract:The vertical turbulent mixing process of point source and linear source in nature rivers are studied in this paper. According to the vertical turbulent mixing process near the discharge point in large rivers,the new concept of part depth of homogeneous mixing is presented.The basic equations of vertical mixing process are developed.The fundamental relationship between the part mixing depth and the vertical mixing distance is obtained.The distance of vertical homogeneous mixing in whole depth can be calculated by the theory equation,which is deduced in the paper.The equat ion is also verified by the measure data in the Yangtze River.On the base of the law,a 2-D water quality numerical model which is mixed through part depth homogeneous is developed,and used in the concentration field calculation.By use of the measure data of Rhodamine-Btracer in the Yangtze River estuary,the comparison of the value calculated with the data measured is made.The value calculated by the new model is more precise than that calculated by the traditional 2-D model,and it is more efficient than 3-D model.
Keywords:river pollution  pollutant source  part depth of vertical homogeneous mixing  vertical turbulent mixing process  distance of vertical homogeneous mixing  2-D water quality model
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