“乱流”是《水经注》载述水流的普通用语 ,据初步统计 ,4 0卷注有 2 8卷中都不同程度有“乱流”的说法 ,总数约 80余处。但“乱流”的含义是什么 ?什么样的流水形态称之为乱流 ?注释家解说的很少。包括今人的理解在内 ,大致可概括为二说 :一释作“正绝流”,亦即“直着横渡江河 According to preliminary statistics, “Turbulent flow” is a common term for water flow in “Waterways,” and according to preliminary statistics, there are about 80 turbulences in 28 volumes, accounting for about 80 in total. But what is the meaning of “turbulent flow” and what kind of flow state is called turbulent flow? Including the present understanding, it can be broadly summed up as follows: a release as “is flow”, that is, "straight across the river