Tests were conducted in an existing 1:100-scale model of Mission Bay Harbor to determine the location and orientation of proposed structures for improving hazardous entrance conditions and reducing surge inside the harbor while minimizing impacts on surfing. The model reproduced Mission Bay Harbor, approximately 3 miles of adjacent Pacific Ocean shoreline, and sufficient offshore bathymetry to permit generation of the required test waves. Two wave generators (60- and 70-ft long), special photographic techniques, and an automated data acquisition and control system were utilized during model operation. It was concluded from model test results that: (a.) Of the improvement plans tested which involved the construction of an offshore breakwater (Plans 10-10D), the 1,050-ft-long structure of Plan 10C was required to meet the established wave-height criteria of 4.0 ft in the entrance for 6-ft incident waves and 1.0 ft in the small-boat basins (Quivira and Mariners Basins) for all wave conditions. The 1,000-ft-long structure of Plan 10B exceeded the criteria in the entrance and small-boat basins by only 0.1 ft and would result in less construction costs and improved navigation. (b.) Of the improvement plans tested which involved the construction of a dogleg breakwater and navigation opening toward the north (Plans 11-11C), the 1,330-ft-long structure of Plan 11C was required to meet the established wave-height criteria. (c.) The improvement plan tested which involved the construction of a dogleg breakwater and navigation opening toward the south (Plan 12) met the established wave-height criteria. (d.) Of all the improvement plans tested (Plans 10-10D, 11-11C, and 12), Plan 10B (1,000-ft-long offshore breakwater) was selected as optimum considering wave protection provided the harbor and entrance, ease of navigation, and economics. (e.) The 1,000-ft-long offshore breakwater of Plan 108 will have a mlnlmal impact on surfing conditions at Mission and Ocean Beaches. (f.) The 1,000-ft-long offshore breakwater of Plan 10B will result in significantly improved surge conditions due to long-period wave energy in the channel and small-boat basins.
Mission Bay Harbor, San Diego County, California, Design for Wave and Surge Protection: Coastal Model Investigation
Technical Report ; TR-CERC-85-11
1985
15617083
Report
Electronic Resource
English
HENRY – Federal Waterways Engineering and Research Institute (BAW) | 1983
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