Continental Shelf Currents in Tropical Storm Delia: Observations and Theory

George Z. Forristall Shell Development Company, Houston, Tex. 77001

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Robert C. Hamilton Evans-Hamilton, Inc., Houston, Tex. 77072

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Vincent J. Cardone Institute of Marine and Atmospheric Sciences, City University of New York, New York, N. Y. 100131

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Abstract

Storm currents are a significant part of the design hydrodynamic flow field in areas subject to tropical storms. In September 1973, Tropical Storm Delia passed over the instrumented Buccaneer platform located in 20 m of water 50 kin south of Galveston, Tex. Current meter records from three depths show the storm produced currents on the order of 2 m s−1 which persisted to near the bottom. A mathematical model of wind-driven current generation was successful in hindcasting the observed current development after a linear slip condition bottom was incorporated in the model.

Abstract

Storm currents are a significant part of the design hydrodynamic flow field in areas subject to tropical storms. In September 1973, Tropical Storm Delia passed over the instrumented Buccaneer platform located in 20 m of water 50 kin south of Galveston, Tex. Current meter records from three depths show the storm produced currents on the order of 2 m s−1 which persisted to near the bottom. A mathematical model of wind-driven current generation was successful in hindcasting the observed current development after a linear slip condition bottom was incorporated in the model.

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