基于MIKE11的多闸坝河道流量演进模拟与分析

Simulation and Analysis of Multi-sluice Dam Channel Flow Evolution Based on MIKE11

多闸坝河段因为闸坝的影响,流量传播规律复杂,给河道流量预报及水量调度带来较大困难。以蒲河棋盘山水库—团结大闸段河道为研究对象,将河段分为7个区段,基于构建MIKE11HD,分析多闸坝对河道流量演进的影响,并通过模型研究不同区段洪峰流量传播时间及流量传播衰减变化。结果表明:洪峰流量与传播时间之间呈现出比较显著的幂函数关系,洪峰流量越大,洪峰传达时间越短;每千米衰减率与河道特性、河道两岸植被相关,受人工渠化影响,7号闸—6号闸段每千米流量衰减率最小,而闸上橡胶坝—老什牛橡胶坝区段每千米流量衰减率最大。研究可为蒲河生态廊道多闸坝联合调度维系水系联通提供依据,也可为其他多闸坝河道流量模拟及洪水预报提供参考。

Due to the influence of sluices,the flow propagation law of multi-sluice dam is complicated,which brings great difficulties to the forecast of river flow and water dispatching.In this paper,the river channel of Qipanshan Reservoir and Tuanjie Sluice of Puhe River is taken as the research object,and the river is divided into seven sections.On the basis of the MIKE11 HD construction,the influence of multi-sluice dams on river flow evolution is analyzed,and the change of peak discharge travel time and flow attenuation in different sections is studied by the model.The results show that there is a significant power function relationship between the flood peak discharge and the travel time.As the flood peak discharge is larger,the travel time will be shorter.The attenuation rate per kilometer is related to the characteristics of the channel and the vegetation on both sides of the channel.Under the influence of artificial channelization,the discharge attenuation rate per kilometer is minimum in the sluice 7-sluice 6 section,and maximum in the section of the rubber dam on the sluice to Laoshiniu rubber dam.This study can provide a basis for the joint operation of multi-sluice dam in the ecological corridor of Puhe River,and also provide a reference for the flow simulation and flood forecast of other multi-sluice dam channels.