NEARSHORE BERM PERFORMANCE AT NEWPORT BEACH, CALIFORNIA, USA

Chuck Mesa

Abstract


In 1992, approximately 1,276,000 cubic yards of littoral material was hydraulically placed into a berm configuration in nearshore water depths at Newport Beach, California, USA. A monitoring program conducted included directional wave measurements, beach and bathymetric profiles, surficial sediment sampling, and controlled aerial photography. Analysis of the bathymetric profiles collectively indicate the berm is experiencing a shoreward-directed dispersal; there is no evidence suggesting offshore or alongshore directed berm movement. Sediment physical characteristics and grain size distribution indicating the berm effects on the seabed are discussed. Recently proposed models for berm stable/active categorization and migration rate are examined. Surfing at the site was significantly enhanced; the berm created breaking wave conditions never before experienced at this location.

Keywords


Newport Beach; nearshore berm; berm performance

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