《水经注·卷十四》
濡水往东南流经乐安亭南面，往东与新河道汇合。旧河道在雍奴县承接鲍丘水，往东流出，称为盐关口。
濡水东南流，径乐安亭南，东与新河故渎合，渎自雍奴县承鲍丘水东出，谓之盐关口。
The Rushui River flows southeast through the south of the Le'an Pavilion, and east to the new waterway. The old waterway joins the Baogui River in Yongnu County, flows eastward, and is called the Yangguankou.