曹操修建了六条运河(续) 第三种说法认为曹操开凿的平虏渠是在姜师度开凿的平虏渠西侧一点。其南口在今河北省青县西南木门店附近的滹沱河上,其北口在今独流镇附近的泒河上。即白沟下游清河的一段,后来又成为南运河中一段的前身。已故著名历史地理学家谭其骧教授,对于海河水系的形成与发展曾进行过深入的研究,他在考证曹操开凿的平虏渠的确 Cao Cao constructed six canals (cont.) The third argument holds that Cao Cao’s flat pipe was drilled to the west of Pinggu canal drafted by Professor Jiang. Its south exit is now on the Hutuo River near the southwestern Mumen shop in Qingxian County, Hebei Province. Its north exit is on the Qunhe River near this town. That is, a section of Qinghe River downstream of Baigou, and later became the predecessor of a section of the South Canal. Professor Tan Qixian, a famous historical geographer, conducted an in-depth study of the formation and development of the Haihe River system.