Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

Simple Techniques for Retrieval of Wind Wave Periods and Directions from Optical Images Sequences in Wave Tanks

Henrique Rapizo, Victor d'Avila, Nelson Violante-Carvalho, Uggo Pinho, Carlos Eduardo Parente and Fabio Nascimento
Journal of Coastal Research
Vol. 32, No. 5 (September 2016), pp. 1227-1234
Stable URL: http://www.jstor.org/stable/43893634
Page Count: 8
  • Download ($20.00)
  • Cite this Item
Preview not available
Preview not available

Abstract

Optical techniques are potentially suitable for overcoming some of the limitations faced by single-point sensors, like buoys, in retrieving spatial properties of wind-generated waves. However, most of the approaches that have been addressed in the literature employ complex configurations that use a coupling system between cameras, making its implementation difficult. This article describes simple techniques for measuring the period and direction of multimodal, regular waves, employing a single, commonly available camera. Furthermore, there is no special requirement for light conditions, making its implementation feasible, in both indoor and outdoor environments. Several tests were conducted in a multidirectional tank, varying the steepness and direction of the waves. The optical measurements were in good agreement, especially for waves from moderate to greater steepness. The techniques described here could be employed as a preliminary step before tackling more-complex configurations, for instance, as a priori information on the main wave modes.

Page Thumbnails

  • Thumbnail: Page 
[1227]
    [1227]
  • Thumbnail: Page 
1228
    1228
  • Thumbnail: Page 
1229
    1229
  • Thumbnail: Page 
1230
    1230
  • Thumbnail: Page 
1231
    1231
  • Thumbnail: Page 
1232
    1232
  • Thumbnail: Page 
1233
    1233
  • Thumbnail: Page 
1234
    1234