Vertical variation of undertow in the surf zone

Akio Okayasu*, Tomoya Shibayama, Kiyoshi Horikawa

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

61 Citations (Scopus)


In order to establish a model of the vertical distribution of the undertow, laboratory experiments were performed on uniform slopes of 1/20 and 1/30. The turbulent velocity in the surf zone including the area close to the bottom was measured by using a two-component laser doppler velocimeter. The distributions of the mean Reynolds stress and the mean eddy viscosity coefficient were calculated. Based on the experimental results, a model to predict the vertical profile of the undertow was presented.

Original languageEnglish
Title of host publicationTwenty First Coastal Eng Conf
PublisherPubl by ASCE
Number of pages14
ISBN (Print)0872626873, 9780872626874
Publication statusPublished - 1988
Externally publishedYes
EventTwenty-First Coastal Engineering Conference - Costa del Sol, Malaga, Spain
Duration: 1988 Jun 201988 Jun 25

Publication series

NameProceedings of the Coastal Engineering Conference
ISSN (Print)0161-3782


OtherTwenty-First Coastal Engineering Conference
CityCosta del Sol, Malaga, Spain

ASJC Scopus subject areas

  • Engineering(all)


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