淮河中游淮南段二维水动力学数值模拟研究

2-D hydrodynamic numerical simulation of Huainan section in middle reach of Huaihe River

为研究淮河中游河段水动力学扩散特征,以淮河淮南段(鲁台子-田家庵)为研究对象,运用SMSRMA2二维数值模型方法对2004年洪水期和2009年枯水期河道内水流运动过程进行了模拟研究,分析了洪峰到来时刻和最枯来水时刻区域内流速、水深的空间分布特点。将该模型应用于区段内分汊河道各支汊过流量的计算,得出分汊河道南支汊具有较好的通航能力。所建模型能较为准确地描述淮河中游淮南段的水动力学变化过程,其成果可应用于下一步河道水质变化的定量研究。

In order to study hydrodynamic diffusion in mid - reach of Huaihe River, taking Huainan section in middle reach of Huaihe River as a study object, a 2 - D mathematical model （ SMS - RMA2） was applied to simulate the water flow movement process in the flood season of 2004 and the dry season of 2009. Flow velocity and water depth distribution at flood peak arrival in- stant and the most low - flow period were analyzed, meanwhile, the flow discharge of the bifurcated rivers of Huainan reach was calculated. The result shows that the south branch has better navigation condition than the north. The proposed model can accu- rately describe the hydrodynamic process of the river, which can provide important data for further water- quality simulation in this area.