《徐霞客游记·粤西游日记三十一》
沿南山的山腰东行一里，南山在东面到了尽头，环绕壑谷建成水塘，外面临江处筑了堤，堤内蓄水浸到山麓。
循南山之半东行一里，南山东尽，盘壑成塘，外筑堤临江，内潴水浸麓。
We walked east for one mile along the hillside to the south of South Mountain, the South Mountain at the east end, built a pond around the ravine, and built a dam at the edge facing the river, and the water inside the dam filled the foot of the mountain.