According to the Bonuli law of conservation of energy, there are two ways to the engineering distribution,that is,to raise the erosion base point Z 2 and to lower the erosion source point Z 1,therefore,the concept of drop dam was introduced.

• 根据伯努里能量守恒定律 ,工程布设应分为抬高侵蚀基点 Z2 与降低侵蚀源点 Z1 两种途径。 为此引进跌水坝概念。