PLANFORM INFLUENCE ON FLUSHING AND CIRCULATION IN SMALL HARBORS

Ronald E. Nece; Roger A. Falconer; Toshiro Tsutsumi

doi:10.9753/icce.v15.199

No. 15 (1976), Conference Proceedings

No. 15 (1976)

PLANFORM INFLUENCE ON FLUSHING AND CIRCULATION IN SMALL HARBORS

Conference Proceedings

https://doi.org/10.9753/icce.v15.199

Published 1976-01-29

Ronald E. Nece⁺⁻
Roger A. Falconer⁺⁻
Toshiro Tsutsumi⁺⁻

Ronald E. Nece

University of Washington, Seattle

Roger A. Falconer

Department of Civil Engineering, Imperial College

Toshiro Tsutsumi

Civil Engineering Research Iestitute of Hokkaido Development Bureau

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Keywords

small harbor
circulation
flushing
planform influence

How to Cite

Nece, R. E., Falconer, R. A., & Tsutsumi, T. (1976). PLANFORM INFLUENCE ON FLUSHING AND CIRCULATION IN SMALL HARBORS. Coastal Engineering Proceedings, 1(15), 199. https://doi.org/10.9753/icce.v15.199

Abstract

Laboratory data showing the influence of planform geometry on the tidal flushing characteristics of small harbors of simple surface shape. The tide ranges, water depths, and planform areas are typical of those encountered in small-boat marinas in Puget Sound, Washington. Each harbor investigated had a single, asymmetric entrance. Flushing and circulation patterns within such harbors depend strongly upon the characteristics of the angular momentum established within the basin and upon the effective penetration distance into the basin of the stream of ambient water entering the harbor on the flood tide. Experimental results confirm that best gross tidal flushing occurs when rectangular harbors have an aspect ratio L/B near unity, and that rounding interior corners of the basin has little effect on the gross tidal flushing but does improve local exchange. Aspect ratios L/B less than 3 lead to the creation of more than one circulation cell (gyre) within the basin.

https://doi.org/10.9753/icce.v15.199

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PLANFORM INFLUENCE ON FLUSHING AND CIRCULATION IN SMALL HARBORS

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