【作者】 韩建军； 王玲玲； 张成潇； 朱海；

【Author】 HAN Jian-jun;WANG Ling-ling;ZHANG Cheng-xiao;ZHU Hai;College of Water Conservancy and Hydropower Engineering,Hohai University;Sate Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering,Hohai University;

【机构】 河海大学水利水电学院； 水文水资源与水利工程科学国家重点实验室；

【摘要】 淮河入洪泽湖段蜿蜒曲折,河道底坡呈倒比降趋势,水沙关系复杂,是影响淮河—洪泽湖防洪体系的关键区域。本研究建立了淮河吴家渡至洪泽湖的一、二维水沙耦合模型,以小柳巷至老子山河段为研究对象,对该入湖河段在丰水年(2017)及枯水年(2013)的输沙和冲淤特性进行数值模拟研究。结果表明,淮河入湖尾闾水流含沙量有沿程减小的趋势,年内丰枯季变化显著,且同期对比发现丰水年汛期输沙量要远大于枯水年。河段冲淤特性在枯水年表现为长时间冲淤平衡,汛期部分时段产生少量淤积;丰水年内枯水期呈冲淤平衡态,而汛期来沙量增大时,受该河段水动力不足的限制,泥沙淤积严重,且随着水流含沙量越高泥沙淤积量也越大。丰水年洪水期淮河入湖段河床有进一步抬升的趋势,成果可为淮河中游行洪格局的调整及河道整治规划的制定提供参考。更多还原

【Abstract】 The reach of Huaihe River into Hongze Lake is meandering and the slope shows a downward trend,and the water-sediment relationship is complex.It is a key region that affects the Huaihe River-Hongze Lake flood control system.In this paper a 1D-2D water-sediment coupling model from Wujiadu to Hongze Lake in Huaihe River is established.Xiaoliuxiang to Laozishan reach was taken as the research object,the sediment transport and scouring-deposition of the reach in wet year(2017) and dry year(2013) are studied by numerical simulation.The results show that the sediment concentration of the flow has a decreasing trend along the reach,and the seasonal variation is significant,and the sediment transport in flood season in wet year is much larger than that in dry year.In dry years,there is a long-term scouring-deposition balance,and a slight amount of deposition occurred in some periods of flood season;In the wet year,the balance of scouring-deposition is observed in the dry season.When the incoming sediment in flood season increased,the sediment deposition is serious due to the limitation of insufficient hydrodynamics in this reach,and the sediment deposition increased with the increase of sediment concentration.The bed in the reach of Huaihe River into Hongze Lake has a rising trend during flood season,and the results can provide reference for the adjustment of flood pattern and the formulation of river regulation planning in the middle reaches of Huaihe River.更多还原