有限时段源一维水质模型的求解及其简化条件

发布时间：2018-05-09 08:28

  本文选题：环境水力学 + 有限时段源　； 参考：《中国水利水电科学研究院学报》2017年05期

【摘要】：有限时段源一维水质模型的求解及其简化为按瞬时源处理的判别条件,对事故性排放污水的应急计算具有十分重要的意义。在等强度有限时段源条件下,采用变量替换和拉普拉斯变换方法,求解了河流污染物浓度分布的解析解。在不同的简化条件下,讨论了该解析解与可对比解析解的一致性。定义了排放数W_t=u~2t_0/D_x,提出了有限时段源可以按瞬时源计算的临界时间t_k(W_t)方程和简化判别条件:当扩散历时tt_k,按有限时段源的浓度分布公式计算;当扩散历时t≥t_k,按瞬时源的浓度分布公式计算。
[Abstract]:The solution of one - dimensional water quality model with finite time period and its simplification are the important significance for the emergency calculation of the accident discharge sewage . Under the condition of equal intensity finite period source , the analytical solution of the distribution of pollutant concentration in the river is solved . Under different simplification conditions , the analytical solution is solved . The critical time t _ k ( W _ t ) equation and the simplified discrimination condition are discussed . The time tt _ k is calculated by the concentration distribution formula of the source of finite time period . When the diffusion duration t 鈮，

本文编号：1865296