Infragravity Waves In The Nearshore Zone
DOWNLOAD
Download Infragravity Waves In The Nearshore Zone PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Infragravity Waves In The Nearshore Zone book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Infragravity Waves In The Nearshore Zone
DOWNLOAD
Author : Kent K. Hathaway
language : en
Publisher:
Release Date : 1998
Infragravity Waves In The Nearshore Zone written by Kent K. Hathaway and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Coastal engineering categories.
This report summarizes the present state of knowledge on infragravity wave motions (nominally 0.003 to 0.05 Hz). Theoretical and observational studies are presented. Most of the studies discussed herein have been published elsewhere, however a few studies discussed in chapter 4 are presented for the first time in this report Measurements of nearshore waves and currents have shown that a significant amount of the total energy can be contained in the infragravity band, and on highly dissipative beaches the infragravity wave variance often dominates over energy in the incident wave band(0.05 to 0.3 Hz). An 8-month data set of infragravity variance measured at 8-m-depth at the shoreline (runup) was compared with incident wave variance. Analysis of the 8-m-depth data showed that high mode edge waves account for about 50 percent of the total infragravity variance, and as high as 80 percent at times. Significant edge wave heights greater than 20 cm were observed at the 8-m depth. Infragravity wave variance was shown to have a higher correlation with swell variance (C = 0.95) than with sea variance (C = 0.61). This report was motivated, in part, by the need to determine the significance of infragravity waves on coastal erosion and structure damage and by the desire to improve coastal engineering solutions to problems associated with nearshore processes.
Shore Wave Modulation Due To Infragravity Waves In The Nearshore Zone With Applications
DOWNLOAD
Author : Saad M. M. Abdelrahman
language : en
Publisher:
Release Date : 1986
Shore Wave Modulation Due To Infragravity Waves In The Nearshore Zone With Applications written by Saad M. M. Abdelrahman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Littoral drift categories.
The omni-present low frequency wave motion (30-300 sec) contains a substantial fraction of the total wave energy inside the surf zone. A more complete description of nearshore wave processes considers incident short period waves superposed on, and interacting with, long standing waves. The wind waves are modulated in amplitude, wavenumber and direction due to relatively slowly varying depth changes caused by the long waves. The energy in the wind wave band is enhanced by side band growth at the sum and difference frequencies of short and long waves (order 15% at the shoreline). The modulation is identified in the analysis of field data as a positive correlation between the long waves and the wind wave envelope near the shoreline. Considering oblique incident waves, a steady longshore current showing a non-vanishing current at the shoreline is found as a result of the non-linear interaction between monochromatic incident and infragravity waves. An analytical solution describing the unsteadiness of the longshore current is developed. Keywords include: Infragravity, Longshore Current, Sediment transport, and Surf zone dynamics. (Theses).
Short Wave Modulation Due To Infragravity Waves In The Nearshore Zone With Applications
DOWNLOAD
Author : Saad M. M. Abdelrahman
language : en
Publisher:
Release Date : 1986
Short Wave Modulation Due To Infragravity Waves In The Nearshore Zone With Applications written by Saad M. M. Abdelrahman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Observations Of Nearshore Infragravity Waves Seaward And Shoreward Propagating Components
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2002
Observations Of Nearshore Infragravity Waves Seaward And Shoreward Propagating Components written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
The variation of seaward and shoreward infragravity energy fluxes across the shoaling and surf zones of a gently sloping sandy beach is estimated from field observations and related to forcing by groups of sea and swell, dissipation, and shoreline reflection. Data from collocated pressure and velocity sensors deployed between 1 and 6 m water depth are combined, using the assumption of cross-shore propagation, to decompose the infragravity wave field into shoreward and seaward propagating components. Seaward of the surf zone, shoreward propagating infragravity waves are amplified by nonlinear interactions with groups of sea and swell, and the shoreward infragravity energy flux increases in the onshore direction. In the surf zone, nonlinear phase coupling between infragravity waves and groups of sea and swell decreases, as does the shoreward infragravity energy flux, consistent with the cessation of nonlinear forcing and the increased importance of infragravity wave dissipation. Seaward propagating infragravity waves are not phase coupled to incident wave groups, and their energy levels suggest strong infragravity wave reflection near the shoreline. The cross-shore variation of the seaward energy flux is weaker than that of the shoreward flux, resulting in cross-shore variation of the squared infragravity reflection coefficient (ratio of seaward to shoreward energy flux) between about 0.4 and 1.5.
Infragravity Waves Over Topography
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2001
Infragravity Waves Over Topography written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Support from the Office of Naval Research (Coastal Geosciences Program, N00014-02-10145), the National Science Foundation (Physical Oceanography, OCE-0115850).
Infragravity Energy And Its Implications In Nearshore Sediment Transport And Sandbar Dynamics
DOWNLOAD
Author : Joan M. Oltman-Shay
language : en
Publisher:
Release Date : 1989
Infragravity Energy And Its Implications In Nearshore Sediment Transport And Sandbar Dynamics written by Joan M. Oltman-Shay and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Gravity waves categories.
Infragravity Energy And Its Implications In Nearshore Sediment Transport And Sandbar Dynamics
DOWNLOAD
Author : Joan Oltman-Shay
language : en
Publisher:
Release Date : 1989
Infragravity Energy And Its Implications In Nearshore Sediment Transport And Sandbar Dynamics written by Joan Oltman-Shay and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Gravity waves categories.
Infragravity Waves And Nearshore Bars
DOWNLOAD
Author : Troels Aagaard
language : en
Publisher:
Release Date : 1989
Infragravity Waves And Nearshore Bars written by Troels Aagaard and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Infragravity Waves Generated Through Shoaling And Breaking Of Wave Groups
DOWNLOAD
Author : Sriram Sivaram
language : en
Publisher:
Release Date : 1992
Infragravity Waves Generated Through Shoaling And Breaking Of Wave Groups written by Sriram Sivaram and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with categories.
Infragravity Velocity Profiles In The Surf Zone
DOWNLOAD
Author : Uday Putrevu
language : en
Publisher:
Release Date : 1994
Infragravity Velocity Profiles In The Surf Zone written by Uday Putrevu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Gravity waves categories.