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

【摘要】：有限時段源一維水質(zhì)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(yīng)急計算具有十分重要的意義。在等強(qiáng)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(shù)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(dāng)擴(kuò)散歷時tt_k,按有限時段源的濃度分布公式計算;當(dāng)擴(kuò)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