In low water head hydraulic constructions,a common hydraulic problem is energy dissipation for small Froude number water flow because the energy dissipation is less efficient.

• 低水头闸坝工程的一个普遍水力学问题是低佛氏数水流的消能防冲,其特点是消能率低,为达到较好的消能效果,常常要在消力池加一些辅助消能工程。