University of Twente Student Theses


Assessment of wave run-up reduction by salt marshes

Post, T.M.I. (2015) Assessment of wave run-up reduction by salt marshes.

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Abstract:The purpose of this thesis is to analyze the salt marshes in the eastern Wadden Sea which are located in front of the dike and assess how these areas influence the waves. Additionally, this thesis looks into the uses of flotsam lines. These lines are made up of pieces of floating debris (or:flotsam) which are transported by waves and left on the slope of the dike, marking the maximum wave run-up for a dike section. The reason for this research os that in evaluations of the required height and strength of a dike, the salt marshes are not taken into account. This means that the design of these dikes is oversized and costly. By determining the impact of the salt marshes of wave conditions under design conditions, it is possible to reduce the uncertainties and take the effects of the salt marshes into account in future dike safety evaluations. Dikes could be deemed 'safe' for additional decades, saving up to several milion euro per kilometer of shoreline. The flotsam lines are a low-cost source of information and by showing the possible uses of this method, valuable data can be gathered after a storm passes in locations where no wave measurements are available.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:56 civil engineering
Programme:Civil Engineering and Management MSc (60026)
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