《水经注·卷十二》
水又向东北流，名叫石槽水，水到这里潜流到地下，只有水满时才能流通，注人沫水，汇流处叫白涧口。
其水又东北流，谓之石槽水，伏流地下，溢则通津委注，谓之白涧口。
The water flows to the northeast again, called the Stone Trough Water. The water flows underground here, and it can only flow when the water is full. It flows into the Moshui River, and the confluence is called Baijiankou.