Flushing Study of South Beach Marina, Oregon

by Richard J. Callaway, Oceanographer; Environmental Protection Agency, Marine Div., Environmental Research Lab., 200 S.W. 35 St., Corvallis, Oreg. 97330,

Serial Information: Journal of the Waterway Port Coastal and Ocean Division, 1981, Vol. 107, Issue 2, Pg. 47-58

Document Type: Journal Paper


A newly constructed single-opening marina was evaluated to determine flushing characteristics by comparison of a hydraulic model and a mathematical model with field studies of dye releases. Both models simulated well-mixed conditions and agreed well with each other. The dye study was conducted by mixing rhodamine-wt throughout the marina on a flood tide and monitoring dye concentration versus time over several tidal cycles following release. Over the initial 7-10 hours of the field studies, all three methods agreed well; field results thereafter showed three to six times less dye than model predictions. For marinas of simple geometry with single openings and width-to-length ratios similar to the marina studied here, flushing estimates may be conservatively approximated by elementary mathematical methods.

Subject Headings: Field tests | Hydraulic models | Mathematical models | Dyes | Flushing | Beaches | Ports and harbors | Comparative studies | Oregon | United States

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