| 可降解的地表水污染物随机游走改进模式 |
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| 引用本文： | 韩龙喜,陈丽娜.可降解的地表水污染物随机游走改进模式[J].水科学进展,2009,20(5):689-694. |
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| 作者姓名： | 韩龙喜 陈丽娜 |
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| 作者单位： | 1.水文水资源与水利工程科学国家重点实验室, 江苏, 南京, 210098; |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 针对随机游走水质模型仅考虑污染物对流输移、扩散效应而忽略污染物降解作用的缺陷,基于可降解污染物的一级反应动力学假设,对现有的随机游走水质模式进行了改进,建立了考虑自净作用的二维随机游走水质模型.作为模型检验,构造典型案例,将改进的随机游走模型计算结果与二维对流分散方程的解析解进行了对比分析,模拟结果表明改进的随机游走水质模式与解析解具有一致性.改进的随机游走模型具有既可考虑水污染物的降解特性,又能够形象直观地描述污染物迁移特征的优点.
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| 关 键 词： | 可降解污染物 随机游走 水质模型 二维 |
| 收稿时间： | 2008-09-04 |
Revised random walk model for degradable water pollutant |
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| HAN Long-xi,CHEN Li-na.Revised random walk model for degradable water pollutant[J].Advances in Water Science,2009,20(5):689-694. |
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| Authors: | HAN Long-xi CHEN Li-na |
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| Affiliation: | 1.State Key Laboratory of Hydrology-Water Resource and Hydraulic Engineering, Nanjing 210098, China;2.Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, MOE, Nanjing 210098, China;3.College of Environmental Science and Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | The random walk model for the existing water quality is improved and a quality 2D random walk model considering the role of self-purification is established based on the assumption of a reaction kinetics of biodegradable pollutants and considering the defects that the water quality model for random walk only takes the convection-diffusion of pollutants into account,and neglects the effect of their own degradation of pollutants.Through the typical case of a model test,the results of the improved random walk model and the 2D convection-diffusion equation analytical solutions are analyzed.It shows that the water quality of the random walk model is consistent with that of the analytical solution.The improved model considers the characteristics of the degradation of water pollutants and visually describes the pollutant migration characteristics. |
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