论文部分内容阅读
十三陵水库洪水预报模型采用动态流域模拟模型DWSM,在原模型中,将整个水库流域划分为15个子流域,每个子流域由1条河道和2个坡面组成,并在子流域出口、各支沟出口、七孔桥及水库大坝设置了节点,方便统计过流洪水量和流量。在新改进模型中,一定程度上考虑了古河道和二坝对来洪的影响;古河道区域渗漏被概化为区域稳定下渗,分为七孔桥上游侧和下游侧2个区域分别考虑,为洪水在河道演进中的时间函数;二坝被概化为宽顶堰,对洪水具有一定的消峰和延时作用。新模型通过1998年洪水率定,洪水流量模拟误差8.8%,洪量模拟误差5%,模拟精度有了一定提高。
In the original model, the entire reservoir basin is divided into 15 sub-basins, each sub-basin consists of 1 channel and 2 slope surfaces, and at the exit of the sub-basin, each branch Gully exit, seven holes and reservoir dam dam set nodes to facilitate statistical over-flow of flood and flow. In the new improved model, the influence of the ancient river channel and the second dam on the incoming flood is considered to a certain extent. The leakage in the ancient river channel is generalized as the steady infiltration of the area, which is divided into two areas on the upstream side and the downstream side respectively Considering the time function of the flood in the evolution of the river course, the second dam is generalized as a wide crest weir and has a certain peak-eliminating and delay effect on the flood. The new model through the 1998 flood rate set, the flood flow simulation error of 8.8%, flood simulation error of 5%, the simulation accuracy has been improved.