多级闸门调控下徒骇河流域雨洪演进模拟与分析

Rain-Flood Routing Simulation and Analysis on Tuhai River Basin Combined with Multi-stage Sluices

在多级闸门调控条件下,利用一维水动力模型软件Mike11软件建立了降雨径流和水动力耦合模型,设计了闸门全开、水位控制、水位差控制3种调控模式;对不同典型年下雨洪演进过程进行模拟,得到河道沿程水位流量变化趋势。结果表明:模型典型断面的模拟结果较好,各参数率定值可靠且可以基本反映雨洪演进过程,上、中、下游河床糙率率定值分别为0.029、0.033、0.035;水流状况受人工调控明显,主要表现在洪峰流量大小、洪峰出现时间以及闸前最高水位的变化上。

To simulate the ra in-flo o d routing process combined w ith multi-stage sluices,software M ik e ll was used to build a coupling model of ra in fa ll-ru n o ff and hydrodynamics.Three calculation modes of sluices including fu lly open,waterlevel control and water level difference control were designed.The simulation of the rain-flo o d routing process during different typical years was carried o u t,and the change trend of water level and flow along river was obtained.The results show that the simulating results for typical cross sections have a good agreement w ith the measurement results,then the value of each parameter is reliable and can basically reflect the flood routing process.The flow state is obviously affected by artificial regulation,which is mainly reflected on the flow of flood peak,the occurrence time of flood peak and the highest water level of the gates.