官珠沟溪流沿地层层面不断虹吸上升，蓄存在地层空隙中，处于过饱和状态。当遇到开放性洞穴或裂隙时，水流向外溢出，成为瀑布。当下悬崖峭壁处，虹吸形成的上升泉演化成涓涓细流小型瀑布，象形若龙涎流淌。

The Guanzhu valley waterfall ascended slowly along the layers of strata, existed in stratigraphic gap and stored in supersaturated state. The water spilled and became waterfall when encountered with open caves or fissure. When going down along cliff, the ascending spring became stream of waterfall due to siphon, and that was like the dragon salivary.