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Applications of a semi-two-dimensional numerical model for river morphological change prediction

机译:半二维数值模型在河流形态变化预测中的应用

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This paper presents some applications of MHYSER 1.0, the newly developed Model for the HYdraulics of SEdiments in Rivers, version 1.0. MHYSER 1.0 is a semi-two-dimensional model using the stream tubes concept to achieve lateral variations of velocity,flow stresses, and sediment transport rate. This is a new tool to address rivers' natural hazards predictions. The sediment routing and bed adjustments calculations are accomplished separately along each stream tube taking into account lateral mass exchanges. To test the model behaviors, MHYSER 1.0 is applied to four test cases. The first example is used to perform water surface profile calculations without sediment transport. The second problem shows MHYSER 1.0 performances regarding movable river beds. For the third application, MHYSER 1.0 is applied to a reach of the Ha! Ha! River (Quebec, Canada), a tributary of the Saguenay River, for the 1996 "downpour." The results show a very good correlation of results with those collected in situ. Finally, an application to a reach of the Outaouais River (Quebec, Canada) shows the use of riverbank stability option to produce the risk area in case of "a dam break occurrence upstream. These applications show the capabilities of the new model and predict its promising role in solving complex real cases.
机译:本文介绍了MHYSER 1.0的一些应用,MHYSER 1.0是最新开发的河流沉积物水力模型1.0版。 MHYSER 1.0是使用流管概念的半二维模型,可实现速度,流应力和沉积物传输速率的横向变化。这是解决河流自然灾害预测的新工具。考虑到侧向质量交换,沿每个水流管分别进行沉积物路径和床层调整计算。为了测试模型行为,将MHYSER 1.0应用于四个测试用例。第一个示例用于执行水面轮廓计算而无需沉积物传输。第二个问题显示了有关可移动河床的MHYSER 1.0性能。对于第三个应用程序,将MHYSER 1.0应用于Ha!哈!河(加拿大魁北克),萨格奈河的支流,代表1996年的“倾盆大雨”。结果显示结果与就地收集的结果具有很好的相关性。最后,对Outaouais河(加拿大魁北克)河段的应用表明,在“上游发生大坝溃坝”的情况下,使用河岸稳定方案来产生危险区域。这些应用表明了新模型的功能并对其进行了预测。在解决复杂的实际案例中发挥有前途的作用

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