Coastal Model Investigation: Ventura Harbor, California, Design for Wave and Shoaling Protection

Authors: Robert R. Bottin Jr; COASTAL ENGINEERING RESEARCH CENTER VICKSBURG MS

Abstract:

A 1:75 scale, three-dimensional hydraulic model was used to investigate the design of proposed harbor structures and channel modifications at Ventura Harbor, California, with respect to ocean waves and shoaling conditions in the harbor entrance. The model reproduced approximately 9,400 ft of the California shoreline and included portions of the existing harbor and offshore bathymetry in the Pacific Ocean to a depth of -40 ft mean lower low water. Improvement plans consisted of a seaward extension of detached breakwaters, the installation of spur groins on the north jetty, construction of a new groin south of the south jetty, and modifications to the entrance channel. An 80-ft-long unidirectional, spectral wave generator, an automated data acquisition system, and a crushed coal tracer material were used in model operation. It was concluded that existing conditions are characterized by excessive ocean waves in the harbor entrance. Sediments from the north shoreline will move southerly and sediment transport will occur from the south shoreline northerly along the shoreline and south jetty and result in deposition.

Limitations:

APPROVED FOR PUBLIC RELEASE