Measurements of Turbulence and Suspended Sediment in Tidal River
Publication: Journal of Hydraulic Engineering
Volume 119, Issue 6
Abstract
Simultaneous measurements of instantaneous velocities (longitudinal and vertical), suspended sediment, and salinities are performed continuously during two spring tides in the Ota River estuary. The velocity sensors are fixed at three heights above the bed and a turbidity sensor is located near the bed. Although the vertical sediment fluxes occur intermittently (as well as the vertical momentum fluxes), the longitudinal sediment fluxes are not very intermittent and the fluctuations of suspended‐sediment concentration are linked to the sign of in spite of the sign. The fractional contribution curves to the vertical sediment flux are similar to those for the Reynolds shear stress. The patterns of conditionally averaged fluctuating velocities indicate that the large positive fluctuations of suspended concentration occur immediately after the transition from the positive to negative of and the suspended‐sediment concentration decreases at the early stage of the positive . The sediment suspension is related to the large‐scale turbulence together with ejection motions; this large‐scale turbulence is probably associated with the cluster of ejections.
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Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 119 • Issue 6 • June 1993
Pages: 704 - 724
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Sep 3, 1992
Published online: Jun 1, 1993
Published in print: Jun 1993
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