Abstract
The discharge measurement is one of the most important works for river engineer. For the present, weusually carry out two types of discharge measurement, those are the Eulerian and the Lagrangian methods. Especially, the measurement through floating device, which is typical as the Lagrange method, is adopted extensively. But most of the rivers in Japan are compound meandering channels, which have complex flow field. So, we have to check the accuracy of discharge measurements of those compound channels.In this paper, we have investigated the accuracy of discharge measurements in a compound meandering channel by using a three dimensional numerical analysis. The accuracy of the discharge measurement is clarified from the Eulerian and the Lagrangian methods.
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