《水经注·卷二十九》
郑玄说：汉水的分支叫潜水。潜水原来的洞穴较小，水流积成一个大泽，泽水外流与汉水汇合，自从大禹把汉水疏通后，这条水就称为西汉水。
郑玄曰：汉别为潜，其穴本小，水积成泽，流与汉合，大禹自导汉疏通，即为西汉水也。
Zheng Xuan said: The tributary of the Han River is called the Suishui River. The original cave of the Suishui River was small, and the water accumulated into a large lake. The lake water flowed out and merged with the Han River. After Dayu dredged the Han River, this river was called the Xishan River.