| ||Front Cover|
| ||Title Page|
| ||Table of Contents|
| ||List of Tables|
| ||List of Figures|
| ||List of symbols|
| ||Literature review|
| ||Design of experiment|
| ||Experimental apparatus, procedure...|
| ||Anaysis and results|
| ||Conclusions and recommendation...|
| Material Information
||The Role of wave and current forcing in the process of barrier island overwash
||xiv, 118 leaves : ill. ; 29 cm.
||Pirrello, Mark A., 1967- ( Dissertant )
Thieke, Robert J. ( Thesis advisor )
Dean, Robert G. ( Reviewer )
Mehta, Ashish J. ( Reviewer )
University of Florida -- Coastal and Oceanographic Engineering Dept
||Coastal & Oceanographic Engineering Dept., University of Florida
||Place of Publication:
||Subjects / Keywords:
||Barrier islands ( lcsh )
Waves ( lcsh )
Ocean currents ( lcsh )
Coastal and Oceanographic Engineering thesis M.E ( local )
Dissertations, Academic -- Coastal and Oceanographic Engineering -- UF ( local )
||bibliography ( marcgt )
non-fiction ( marcgt )
||With the rapid growth and development of barrier islands, understanding the long-term stability of these islands is an integral part of future coastal planning. The overwash process is the largest influence on the long-term stability of these islands and thus a corresponding understanding is of major importance. A laboratory experiment was undertaken to physically model the wave and current forcing as they pertain to the overwash process. The physical model was subjected to various storm conditions common to the occurrence of the overwash. Combinations of wave height, wave period, and overwash depth were tested in an attempt to isolate the significant parameters. Water surface gradients were also applied to observe their influence on the overwash process. Wave height, current, and bed profile measurements were taken at different locations throughout the tank. In addition, wave height transformation modeling and mean current prediction were performed and compared to the laboratory results in an attempt to model the overwash process through computer simulations. The experimental results demonstrate that the water surface gradient is the mechanism that has the greatest influence in producing “significant” overwash and is most likely responsible for transporting large quantities of sand on to and over barrier islands. In addition, two other conclusions were drawn about the overwash process: 1) the overwash depth plays an important role in determining the overwash velocity and hence the amount of sand deposited on the barrier island. 2) There seems to exist a correlation between the strength of the return flow and bar formation. It was also determined that modeling the wave height transformation during the overwash process is possible if the model is expressly written for the overwash process and not for non-overwashing cases. The method utilized to predict the mean currents during overwash was not able to predict their strength but was able to substantiate the correlation between return flow and bar formation. As a result of overwash, the increased shoreward mass transport and reduced return flow in the water column are able to initiate and sustain a shoreward sediment transport. Finally, it was concluded in all likelihood only “significant” overwash evens after the long-term stability of the barrier islands.
||Thesis (M.E.)--University of Florida, 1992.
||Includes bibliographical references (leaves 114-117).
||Statement of Responsibility:
||by Mark A. Pirrello.
||This publication is being made available as part of the report series written by the faculty, staff, and students of the Coastal and Oceanographic Program of the Department of Civil and Coastal Engineering.
| Record Information
||University of Florida
||University of Florida
||All rights reserved by the source institution and holding location.
||aleph - 001872341
oclc - 29233536
notis - AJU7343
|Table of Contents
Table of Contents
List of Tables
List of Figures
List of symbols
Design of experiment
Experimental apparatus, procedure and conditions
Anaysis and results
Conclusions and recommendations