The results show that because the coupling source term in the model governing equation is estimated improperly, number surges unavoidably and the computation is difficult to converge.

• 结果表明：由于水动力模型的控制方程中耦合源项在计算迭代步之内总是被不合理地估算，易于产生数值振荡以致整个计算难以收敛；