Comparison of Vertical Velocity Measurements in the Great Lakes Connecting Channels with Theoretical Profiles

by Jan A. Derecki, Great Lakes Environmental Research, Lab, United States,
Frank H. Quinn, Great Lakes Environmental Research, Lab, United States,

Document Type: Proceeding Paper

Part of: Soil Properties Evaluation from Centrifugal Models and Field Performance


Vertical distribution of velocities was measured with an upward looking acoustic Doppler current profiler in the upper St. Clair River during November 1984 - April 1986 and the Detroit River from November 1986. With water depth of about 14 m at both meter locations, the profiler provides 11 vertical velocity readings at 1 m increments between about 2.5 m above the bottom and about 0.5 m below the surface. The measured data are recorded at 15 min intervals, from which hourly and daily values are derived. These velocity vectors are later combined to produce vertical velocity profiles of the two rivers. The velocity data for shorter periods indicate somewhat larger scatter, but the vertical velocity profiles for all periods illustrate high consistency and verification of the theoretical, logarithmic vertical distribution of velocities.

Subject Headings: Velocity profile | Fluid velocity | Velocity distribution | Lakes | Channels (waterway) | Comparative studies | Doppler systems | Acoustics | Great Lakes | Detroit | Michigan | United States

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