A physical model study, using a 1:100 scale (undistorted) hydraulic model of Los Angeles Outer Harbor, California, was conducted to investigate short-period storm wave conditions for proposed harbor development located near the Angel's Gate entrance. The model reproduced two stages of the proposed Pier 400 dredging and landfill project, Angel's Gate entrance, portions of the existing breakwaters, and sufficient bathymetry in San Pedro Bay to permit proper reproduction of the required test waves. An 80-ft-long electrohydraulic, unidirectional, spectral wave generator and an automated data acquisition and control system were used in model operation. The following conclusions can be derived from the results of these tests: "Dredged channel configurations with no landfalls" (a.) Both the -63- and -85-ft channel configurations resulted in large wave heights at the toe of the proposed Pier 400 landfill. Maximum wave heights of 21.8 and 22.3 ft will occur for the -63- and -81-ft channels, respectively, for extreme wave conditions with a +8.0-ft still-water level (swl). The -63-ft channel bathymetry focuses wave energy slightly more to the east inside the outer harbor than the -81-ft channel bathymetry. (b.) For operational wave conditions with the +5.5-ft swl, maximum wave heights of 4.4 and 4.6 ft will occur adjacent to Pier 300 for the -63- and -81-ft channel configurations, respectively, with no landfills installed. (c.) For extreme wave conditions with the +8.0-ft swl, maximum wave heights of 10.0 and 10.4 ft will occur adjacent to Pier 300 for the -63- and -81-ft channel configurations, respectively, with no landfills installed. "Port of Los Angeles (PO LA) Stages 1 and 2" (a.) Both the POLA Stage 1 and Stage 2 landfill configurations provide excellent wave protection to the Pier 300 berthing areas. For operational wave conditions with the +5.5-ft swl, maximum wave heights will not exceed 0.4 ft; and for extreme wave conditions with the +8.0-ft swl, wave heights will not exceed 1.4 ft for either stage of construction. (b.) The berth in the channel west of Pier 400 will experience maximum wave heights of 1.0 and 1.1 ft for operational wave conditions with the +5.5-ft swl; and 3.1 and 3.7 ft for extreme wave conditions with the +8.0-ft swl for POLA Stages 1 and 2, respectively. (c.) The dredged berth east of Pier 400, included in the POLA Stage 2 configuration, will experience maximum wave heights of 2.4 ft and 3.9 ft for operational and extreme wave conditions, respectively. (d.) Overtopping of the landfill in an area approximately 1,500 to 2,000 ft west of the causeway may occur for both POLA Stages 1 and 2 for extreme test wave conditions with the +8.0-ft swl.
Wave Conditions for Pier 400 Dredging and Landfill Project, Los Angeles Outer Harbor, Los Angeles, California
Technical Report ; CERC-94-8
1994
10497453
Report
Elektronische Ressource
Englisch
Dredging and Landfill Design for Pier 400 Project at Los Angeles Harbor, California
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