Onshore-offshore transport and resulting beach profile | |
| Author | Surapong Naidrucksakul |
| Call Number | AIT Thesis no.WA-85-43 |
| Subject(s) | Sediment transport Coast changes |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Storm waves erode material on a beach and transport it offshore causing shoreline recession, while post-storm waves return the material transported offshore to the beach face resulting in shoreline advance. This cyclic change of beach and onshore-offshore sediment transport are interactive depending on characteristics of wave and beach. The information on morphologic change of beach and sediment transport are required for planning and design of coastal structures. This study aims to quantify the above phenomenon through laboratory experiments in a wave basin in order to i) visualize the processes of wave transformation and sediment transport; and ii) obtain data for numerical modelling. It is found from the laboratory experiment that i) the wave height outside the breaker zone can be well described by theoretical solution of wave shoaling while the wave height from the breaker line to the location of wave runup decays linearly; ii) the runup is found to follow Hunt's formula with a smaller empirical constant; iii) the foreshore slope of the beach is governed by the deepwater wave steepness and relative size of the sand; and iv) the sediment transport rate on sloping beaches is lower than that developed on plain beaches. It is found from the numerical modelling that the developed numerical model can simulate the chronological changes of beach morphology. |
| Year | 1985 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Suphat Vongvisessomjai |
| Examination Committee(s) | Tawatchai Tingsanchali ;Prida Thimakorn |
| Scholarship Donor(s) | The Government of Australia |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1985 |