本文選題：環(huán)境水力學 + 有限時段源�。� 參考：《中國水利水電科學研究院學報》2017年05期

【摘要】：有限時段源一維水質模型的求解及其簡化為按瞬時源處理的判別條件,對事故性排放污水的應急計算具有十分重要的意義。在等強度有限時段源條件下,采用變量替換和拉普拉斯變換方法,求解了河流污染物濃度分布的解析解。在不同的簡化條件下,討論了該解析解與可對比解析解的一致性。定義了排放數W_t=u~2t_0/D_x,提出了有限時段源可以按瞬時源計算的臨界時間t_k(W_t)方程和簡化判別條件:當擴散歷時tt_k,按有限時段源的濃度分布公式計算;當擴散歷時t≥t_k,按瞬時源的濃度分布公式計算。
[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，

本文編號：1865296