Harbor Study for San Nicolas Bay, Peru

by James M. Keith, (M.ASCE), Vice Pres.; John A. Blume & Assocs., Engrs., San Francisco, CA,
Emmett J. Murphy, Proj. Mgr.; Marcona Corp., San Francisco, CA,

Serial Information: Journal of the Waterways, Harbors and Coastal Engineering Division, 1970, Vol. 96, Issue 2, Pg. 251-273

Document Type: Journal Paper

Discussion: Magoon Orville T. (See full record)
Discussion: Wilson Basil W. (See full record)
Discussion: Divoky David (See full record)

Abstract: A pair of ducted impeller current meters, one mounted vertically and the other horizontally, were used to measure wave action at San Nicolas Harbor, Peru. The horizontal water velocity records are superior to conventional wave records because they measure directly the wave property which induces adverse horizontal ship motion, and provide directional wave data. Spectral analysis methods proved well-suited to detailed interpretation of the particle velocity records, while considerable insight into the wave phenomena was gained by simple, rational inspections and interpretations of the records. Time-lapse movies of a moored ship, when correlated with simultaneous water particle velocity records, provided an exceptionally clear picture of ship response to wave action, and led to the rather surprising observation that long-period ship motion is not necessarily caused by long-period waves. The foregoing ship response was duplicated in hydraulic model tests.

Subject Headings: Wave velocity | Ship motion | Developing countries | Bays | Ports and harbors | Particle velocity | Wave measurement | Model tests | Wave action | Hydraulic models | Peru | South America

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