Turbulence Measurement of Two-layer Flow in the Teshio River Estuary

Abstract

We have made the field observation of turbulent flow in the tidal portion of Teshio river, using a two-dimensional LDV system of our making. The turbulence energy and Reynolds stress were higher in an upper layer than in a lower layer due to surface wave with the frequency of 0.3 Hz, but there existed the velocity fluctuation of 1 Hz in the whole depth with about equal intensity. Turbulent intensities of vertical velocity component were proportion to that of horizontal velocity component.