大柳树水利枢纽对宁蒙河段防凌影响数值模拟

发布时间：2018-05-23 08:56

本文选题：大柳树水利枢纽 + 数值模拟　；参考：《人民黄河》2017年10期

【摘要】：黄河宁蒙河段凌汛期封河自下而上,开河自上而下,容易形成冰塞壅水,导致冰凌灾害。采用一维、二维水温数学模型模拟计算了冬季三种不同气象条件下拟建大柳树水库运用后下游宁蒙河段沿程水温分布及结冰点的位置。由计算结果可知:在正常气温、热型气温、寒冷气温条件下,初始结冰点的位置分别距离大柳树水库坝址320.4、331.6、276.5 km。预计大柳树水库建成后,宁夏河段将成为不封冻河段,青铜峡水库库尾冰塞现象不再出现,石嘴山至乌海段冰塞问题基本缓解。零温断面位置将下移到石嘴山至磴口之间,距大柳树水库坝址约320 km。
[Abstract]:It is easy to form ice jams to choke up the river from the bottom to the bottom during the ice flood period in the Ningmeng reach of the Yellow River, which leads to the ice disaster. By using one-dimensional and two-dimensional water temperature mathematical models, the distribution of water temperature and the location of freezing point along the lower reaches of Ning-Meng River in the lower reaches of Daliushu Reservoir are simulated and calculated under three different meteorological conditions in winter. The results show that under normal temperature, heat temperature and cold temperature, the location of the initial freezing point is 320.4331.6 ~ 276.5 km from the dam site of Daliushu Reservoir, respectively. It is expected that after the completion of Daliushu Reservoir, the Ningxia reach will become an unfrozen reach, the phenomenon of ice slug in the tail of Qingtongxia Reservoir will no longer appear, and the problem of ice slug from Shizuishan to Wuhai will be basically alleviated. The position of zero temperature section will be moved down between Shizuishan and Dengkou, about 320 km from the dam site of Dengkou reservoir.
【作者单位】：北方民族大学土木工程学院;西安理工大学西北水资源与环境生态教育部重点实验室;
【基金】：陕西省科技统筹创新工程重点实验室项目(2013SZS02-Z01) 北方民族大学重点科学研究资助项目(2015KJ11);北方民族大学科学研究资助项目(2014QZP05,2016KY-01)
【分类号】：TV875

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