Bottin, Robert R. Jr.
[VerfasserIn];
Briggs, Michael Jeffrey
[VerfasserIn]
;
United States. Army. Corps of Engineers. Portland District.
[MitwirkendeR]
Newport North Marina, Yaquina Bay, Oregon, Design for Wave Protection: Coastal Model Investigation
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Source: https://erdc-library.erdc.dren.mil/jspui/ ; A 1:60 scale (undistorted) three-dimensional hydraulic model was used to investigate the design of proposed breakwater modifications at Newport North Marina, Yaquina Bay, OR, with respect to wave and current conditions in the harbor and sediment patterns at the site. The model reproduced the existing marina and a portion of the Yaquina River from west of the U.S. Highway 101 bridge upstream. Proposed improvements consisted of breakwater modifications at the marina entrance. A 12.2-m-long (40-ft-long) unidirectional, spectral wave generator, a water circulation system, an automated data acquisition and control system, and a crushed coal tracer material were used in model operation. Test results led to the following conclusions: (a.) Existing conditions are characterized by rough and turbulent wave conditions during periods of storm wave attack. Wave heights in excess of 0.9 m (3 ft) occurred in the marina mooring areas. (b.) Preliminary tests for the three originally proposed design alternatives (Plans 1-3) indicated that none of the test plans would meet the original 0.3-m (1-ft) criterion in the marina mooring area. (c.) Of the three originally proposed design alternatives, preliminary tests indicated that the angled rubble-mound breakwater extension concept (Plan 3 series) was most effective considering wave protection provided in the mooring area versus structure length. The detached breakwater concept (Plan 2 series) proved to be the least effective. (d.) Preliminary testing of the expeditiously constructed breakwater plans proved valuable in the selection of the structure alignments and locations used for the final test series. (e.) Test results for "modified" existing conditions (revetment, etc., installed) revealed rough and turbulent wave conditions in the marina with wave heights in excess of 0.9 m (3ft) during storm wave conditions. Generally, however, the revetment slightly improved overall wave conditions in the marina. (f.) Tests conducted in the ...