《水经注·卷五》
《汉书•沟恤志》说：大河对中原危害特别严重，所以从积石开始疏导河水，经过龙门，疏通了两条渠道来引导大河的水流。
右渎东北径广宗县故城南，又东北径界城亭北，又东北径长乐郡枣强县故城东。
According to the Hanshu Canal Relief Records: The Yellow River is particularly harmful to the Central Plains, so the Yellow River is diverted from Jishi, passing through Longmen, dredging two channels to guide the Yellow River's water flow.