By using the method of characteristics, a shock fitting schemes for computation of gas dynamics is proposed and used to simulate the 1-D unsteady open channel flow of sudden dam break.

• 基于特征线上的相容方程和激波点处的间断条件,构造了一维溃坝涌波的一种拟合计算的显格式,并进行了一维矩形断面水坝瞬间全溃洪水波演进的数值模拟。