在 1998年汛后河床边界条件基础上 ,增补 1999年汛前新建河道整治工程 ,利用小浪底至苏泗庄河段动床模型开展了“58修正型”洪水形势预演试验。试验结果表明 ,小浪底水库运用初期 ,黄河下游防洪形势不容乐观 ,洪峰期间水位高、工程局部冲刷严重、局部河段出现顺堤行洪和发生滚河现象。 Based on the riverbed boundary conditions after the flood season in 1998, the new river regulation project before the flood season in 1999 was added, and the “58-corrected” flood situation rehearsal test was carried out by using the movable bed model from Xiaolangdi to Su Si Zhuang sections. The experimental results show that the flood control situation in the lower reaches of the Yellow River is not optimistic during the early stage of Xiaolangdi Reservoir operation. The water level is high during the flood peak and the local scour of the project is serious.