發(fā)布時(shí)間：2018-05-16 16:02

  本文選題：一二維耦合模型 + 潰、漫堤洪水��； 參考：《南水北調(diào)與水利科技》2017年05期

【摘要】：為了解決復(fù)雜條件下河道洪水漫堤、潰堤和潮水倒灌的問題,建立了在洪水和風(fēng)暴潮共同作用下的天然河道漫潰堤洪水在防洪保護(hù)區(qū)的一二維水動力耦合模型。在兼顧計(jì)算效率和精度的基礎(chǔ)上,分區(qū)剖分網(wǎng)格,設(shè)置合理的網(wǎng)格面積;根據(jù)植被和地物的不同,分區(qū)設(shè)置糙率;通過寬頂堰的方式將河道一維模型和防洪保護(hù)區(qū)二維模型進(jìn)行側(cè)向耦合;采用基于侵蝕的漸變潰破壞方式模擬河道潰堤過程,實(shí)現(xiàn)了河道上游發(fā)生洪水和下游遭遇外海風(fēng)暴潮的復(fù)雜情況下精細(xì)化模擬。實(shí)例研究表明,所建模型可靈活處理復(fù)雜多變的水力條件,模擬結(jié)果合理可靠,可為防汛部門制定決策提供有力的科學(xué)依據(jù)。
[Abstract]:In order to solve the problem of overtopping embankment break and tide-back irrigation under complex conditions a one-dimensional hydrodynamic coupling model of overburst flood of natural river course in flood protection area was established under the combined action of flood and storm surge. On the basis of taking into account the calculation efficiency and precision, the area of grid is set up by dividing the grid, and the roughness is set according to the difference of vegetation and feature. The one-dimensional model of river channel and the two-dimensional model of flood control protection area are coupled laterally by means of broad-topped Weir, and the process of embankment break is simulated by gradual collapse and failure mode based on erosion. The detailed simulation of the upper reaches of the river and the storm surge in the lower reaches of the river is realized. The case study shows that the model can deal with complicated and changeable hydraulic conditions flexibly, and the simulation results are reasonable and reliable, which can provide a powerful scientific basis for the decision-making of flood prevention departments.
【作者單位】： 天津大學(xué)水利工程仿真與安全國家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家自然科學(xué)基金項(xiàng)目(51209158) 高等學(xué)校學(xué)科創(chuàng)新引智計(jì)劃資助項(xiàng)目(B14012)~~
【分類號】：TV122.4

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