from Part II - Coastal Processes
Synopsis
Wave theories provide a mathematical description of changes in the form of waves, and the orbital motion associated with them, from deep water to the breaker line and into the surf zone. Because of the limitations imposed by assumptions about the wave form and water depth, no one theory is valid over the full range of conditions. The theories can be used simply to predict wave height, celerity and length in any water depth as well as functions associated with the orbital motion, such as the maximum orbital motion near the bed and the orbital diameter. The formulae for the simplest theories can be programmed in a spread sheet, and there are computer programs available that will provide solutions for all of the basic theories. These theories also provide the basis for complex numerical simulation models that are used to predict waves, currents and sediment transport in the nearshore and breaker zones.
Wave shoaling describes changes to the wave form and orbital motion as it moves into shallow water. During the process of shoaling, interaction with the underwater topography results in a bending of the direction of travel of the wave crests so that they conform to the shape of the depth contours, a process termed wave refraction. Wave refraction leads to a concentration of wave energy in some location, especially headlands, and a divergence of energy in other areas.
To save this book to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.