【作者】 饶贵康； 王玲玲； 徐津；

【Author】 RAO Gui-kang;WANG Ling-Ling;XU Jin;College of Water Conservancy and Hydropower Engineering,Hohai University;

【机构】 河海大学水利水电学院；

【摘要】 南水北调二期长江至洪泽湖段(长洪段)工程依托淮河入江水道,在一期工程的基础上计划新增抽江370 m~3/s。入江水道是淮河行洪的安全阀,下泄70%以上的淮河洪水,对淮河的行洪安全十分重要,所以二期工程长洪段全湖方案的实施,对入江水道行洪能力的影响引起了水利工程界的广泛关注。本研究针对南水北调二期长洪段全湖方案,采用数值模拟方法,建立长江至洪泽湖段一二维耦合数学模型,在三河闸下泄流量为12000 m~3/s的设计洪水工况下,研究全湖方案对于入江水道行洪能力的影响。研究结果表明:全湖方案下,高邮湖和邵伯湖水位均降低,湖区平均水位分别下降约6.7 cm和6.0 cm,其水动力轴线与工程抽槽主线吻合较好,仅在邵伯湖部分区域存在约50m的偏移。高邮高站点的模拟水位相比现状地形工况,其水位下降了约6.8 cm。可认为全湖方案实施后,不影响入江水道的设计泄洪能力。更多还原

【Abstract】 The second phase of the South-to-North Water Transfer Project from Yangtze River to Hongze Lake(Changhong Section) relies on the water channel from Huaihe River into Yangtze River,and on the basis of the first phase of the project,it is planned to pump 370 m~3/s more water from the Yangtze River.As the safety valve for the flood passage of Huaihe River,the discharge of more than 70% of the flood of Huaihe River is very important for the flood passage safety of Huaihe River.Therefore,the effect of the implementation of the whole lake scheme of the Changhong section of the second phase of the project on the flood passage capacity of the flood passage of Yangtze River has aroused widespread concern in the field of water conservancy engineering.In this paper,one-two dimensional coupling mathematical model for the section from the Yangtze River to Hongze Lake was established by numerical simulation for the whole lake scheme of the Changhong section of the second phase of the South-to-North Water Diversion Project.Under the design flood condition of the discharge of the Three River Sluice is 12000 m~3/s,the influence of the whole lake scheme on the flood discharge capacity of the water channel into Yangtze River is studied.The results show that under the whole lake scheme,the water level of Gaoyou Lake and Shaobo Lake both decrease,and the average water level of the lake area decreases by about 6.7 cm and 6.0 cm respectively.The hydrodynamic axis is in good agreement with the main engineering pumping channel,and there is only a deviation of about 50 m in part of Shaobo Lake.Compared with the current terrain condition,the simulated water level of Gaoyougao Station decreased by about 6.8 cm.It can be considered that after the implementation of the whole lake scheme,the designed flood discharge capacity of the water channel into Yangtze River will not be affected.更多还原