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黄河内蒙古段弯道因其特殊的热力、动力和河道形态等因素的综合影响,在流凌期极易形成卡冰结坝的现象,造成冰凌灾害。在黄河内蒙古段2013年度冬季流凌至封河期间冰情观测的基础上,对三湖河口弯道处冰凌动力特性进行了数值模拟,揭示了弯道处在河道形态影响下的冰凌动力条件和封河特征,模拟了三湖河口弯道岸冰形成区域、形成过程和可能形成冰塞冰坝的位置。结果显示,受弯曲河道地形的影响,流凌在弯道内摆动轨迹复杂,流凌期首先在凸岸处会有大片岸冰生成,随之,在凸岸顶端下游束窄的断面处封河,此断面也成为可能最易形成冰坝的河道位置。
Due to the comprehensive influence of the special heat, power and river shape, the curved section of Yellow River in Inner Mongolia can easily form a stuck ice dam in the flow-over period, resulting in the ice-flood disaster. Based on the ice observation during the winter flow of Inner Mongolia in the Inner Mongolia section of the Yellow River from the year of 2003 to the closure of the Yellow River, the dynamic characteristics of icing at the bend of the Sanhu estuary are numerically simulated, Characteristics, and simulate the ice formation area, forming process and the location of ice slush dam that may be formed in the bend of the Sanhu estuary. The results show that, due to the influence of curved river topography, the flow trajectory in the curve is very complicated. At the first phase of the flow, there will be a large amount of shore icy ice to form. At the next, The cross-section also became the most likely river position to form a ice dam.