万家寨水库库尾封河初期冰塞水位变化分析

发布时间：2018-03-20 23:20

本文选题：冰凌　切入点：水位　出处：《人民黄河》2017年02期 　论文类型：期刊论文

【摘要】：为研究凌汛期万家寨库尾水位短期变化情况,通过解析原始资料和建立数学统计模型两种方式,分析了以水泥厂观测点为代表的万家寨库尾水位突升的现象及原因,并初步评估了水泥厂水位增长期内库区水位因子和气温因子对水位增长的影响率。分析得出:水泥厂水位呈线性增长,上涨最高可达8.5 m;岔河口弯道地形、铁路桥墩阻冰和持续低温有助于流凌形成堆积并发展成冰塞、冰坝;不管是否考虑温度因子,岔河口水位因子的影响率均为最大,即岔河口形成冰塞、冰坝是上游水位突升的主要影响因子,这一结论可为万家寨水库防凌调度提供一定的依据。
[Abstract]:In order to study the short-term variation of the tail water level in Wanjiazhai reservoir during the ice flood period, the phenomena and causes of the sudden rise of the tail water level of Wanjiazhai reservoir, represented by the observation point of cement factory, were analyzed by analyzing the original data and establishing the mathematical statistical model. The influence rate of water level factor and temperature factor on water level growth in the reservoir area during the period of water level growth of cement plant is preliminarily evaluated. The results show that the water level of cement plant increases linearly, the maximum increase can be up to 8.5 m.The topography of the bend at the fork of the river, The ice resistance and continuous low temperature of railway bridge piers are helpful to the formation of ice slugs and the development of ice slugs and ice dams. Whether or not temperature factors are taken into account, the influence rate of water level factors at the mouth of the Cha River is the greatest, that is, the formation of ice jams at the mouth of the river. Ice dam is the main influencing factor of water level sudden rise in the upper reaches. This conclusion can provide some basis for flood prevention and operation of Wanjiazhai Reservoir.
【作者单位】：黄河水利科学研究院;黄河水利委员会宁蒙水文水资源局;
【基金】：国家自然科学基金资助项目(51409112,51679102) 黄河水利科学研究院基本科研业务费项目(HKY-JBYW-2014-04,HKY-JBYW-2016-34) 水利部公益性行业科研专项(201401022)
【分类号】：TV875

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