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ON PREDICTING INFRAGRAVITY ENERGY IN THE SURF ZONE.

By:
,
Edited by:
Billy L. Edge

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Abstract

Flow data were obtained in the surf zone across a barred profile during a storm. RMS cross-shore velocities due to waves in the intragravity band (wave periods greater than 20 s) had maxima in excess of 0. 5 m/s over the bar crest. For comparison to measured spectra, synthetic spectra of cross-shore flow were computed using measured nearshore profiles. The structure, in the infragravity band, of these synthetic spectra corresponded reasonably well with the structure of the measured spectra. Total variances of measured cross-shore flow within the infragravity band were nondimensionalized by dividing by total infragravity variances of synthetic spectra. These nondimensional variances were independent of distance offshore and increased with the square of the breaker height. Thus, cross-shore flow due to infragravity waves can be estimated with knowledge of the nearshore profile and incident wave conditions. Refs.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
ON PREDICTING INFRAGRAVITY ENERGY IN THE SURF ZONE.
ISBN:
0872624382
Volume
2
Year Published:
1985
Language:
English
Publisher:
ASCE
Publisher location:
New York, NY, USA
First page:
1940
Last page:
1951
Number of Pages:
12
Conference Title:
Nineteenth Coastal Engineering Conference, Proceedings of the International Conference.
Conference Location:
Houston, TX, USA