Barbers Point Harbor, Hawaii, Jetty Modification Study
2008
Briggs, Michael J. | Melito, Ivano
A series of laboratory experiments were conducted for a range of model ships, irregular waves, wave-induced longshore currents, and jetty lengths to optimize the length of a proposed entrance channel jetty at Barbers Point Harbor, Hawaii. Eleven jetty configurations were studied on both sides of the entrance channel, with lengths varying from no-jetty to the proposed 450-ft length. Unidirectional spectral waves with wave periods of 6, 10, 14, and 18 sec, wave height of 7 ft, and incident wave directions of S25W (20 deg south of channel centerline) and S8oW (35 deg west of channel centerline) were generated. Wave-induced ship motions were obtained for 392 inbound and outbound transits with 1:75 scale models of the APL President Lincoln C9-Class containership, a modified Bunga Saga Empat bulk-cargo carrier, and a Kukahi oceangoing barge. The 375-ft-long jetty on the north side of the channel and the 2-ft depth transition inside the harbor were recommended. This conclusion was based on: (a) measured wave heights in the channel and barge basin, (b) ship and barge handling and maneuverability characteristics, (c) dye and current meter studies of the circulation patterns and flows in the channel, and (d) input from the sponsor, EPA, and harbor pilots.
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