雨水使河水流量增加，带动上游的石块向下游流动。当石块遇上河床上岩石凹处无法前进时，会被水流带动而打转。久而久之将障碍磨穿，形成一圆形孔洞，称为壶穴。 枯木潭，是由华溪上游来水携带砂石，经长期冲击，流水旋转磨蚀，形成的锅穴式深潭，即壶穴。该壶穴略呈圆形，面积80平方米，深约1.5米，来水方向形成高差约2.5米的瀑布景观，雨水期瀑布景观较为壮观，枯水期瀑布静流，潭水翠绿。 As the river flow increases, it carries stones from upstream downstream When these stones encounter depressions in the riverbed and cannot move forward, they are spun by the water current. Over a long period, the obstacles are worn through, forming circular holes known as pothole. Kumu Pool is pot-like deep hollow formed by the long-term impact and rotational erosion of water carrying sanc and stones from the upper reaches of Huaxi Stream. This pothole is roughly circular, with an area of 80 square meters and a depth of about 1.5 meters. The incoming water creates a waterfall landscape with a height difference of about 2.5 meters. During the rainy season, the waterfall is quite spectacular, while in the dry season, it flows gently, and the pool's water appears emerald green.