Based on the Saint-venant equations describing the channel flow movement, the nonlinear algebraic equations derived by the use of Preissmann weighted implicit four-point scheme are solved with the Netwon-Raphson method. A combined Gauss main-element elimination method with compress-storage technique is proposed. The relaxation iterative method for solving branch river networks is extended, which can turn the problem of any complex river networks into the problem of a series of single rivers. The coupling of hydraulic model with water quality model is built up. The combined model was applied to a large complicated river networks with numerical hydraulic structure which influenced by strong tide, storm and heave rain. Visualization of computational results is realized by means of MapInfo, which displays the computational results in fast, convenient and accurate way.

水力模型以描述河道洪水波運動的Saint-Venant方程組為基礎(chǔ)干鲁鲁鲁鲁鲁鲁，用Newton-Raphson方法直接求解按Preissmann加權(quán)四點格式進(jìn)行離散所得的非線性代數(shù)方程組成人一级黄色视频网站，提出了壓縮存貯形式的Gauss列主元消去法并對數(shù)值解的收斂性進(jìn)行了討論999一级黄片；將支流流量的松弛迭代方法從樹狀河系推廣到了環(huán)狀河網(wǎng)深夜免费在线观看网站，使任意復(fù)雜河網(wǎng)水力計算的問題都可化為一系列的單一河道的水力計算問題一级黄色网站一；建立了水力模型與水質(zhì)模型的聯(lián)接人人艹在线免费，初步應(yīng)用于既有洪水、暴雨www.99riav3.c鈥唌、強(qiáng)潮等綜合影響91网址在线观看播放，又存在多種水工建筑物及水力調(diào)度問題的大型復(fù)雜河網(wǎng)中的非恒定流水力、水質(zhì)計算問題中文字幕手机在线观看第一页；利用MapInfo對計算結(jié)果的可視化進(jìn)行了研究加勒比黄色网站，有利于決策者快速、方便免费看性爱、準(zhǔn)確地作出決策污视频久久久。

I have to stay at home because of heave rain.

由于下大雨，我們不得不留在家里日韩最大的黄色网站。

We need good planning,Noah's ark was built before the heave rain came.

凡事要先做好準(zhǔn)備日韩二区精品，方舟是在大雨前建造的。