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A Typical Wave Wake from High-speed Vessels: Its Group Structure and Run-up : Volume 20, Issue 1 (26/02/2013)

By Didenkulova, I.

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Book Id: WPLBN0003988314
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: A Typical Wave Wake from High-speed Vessels: Its Group Structure and Run-up : Volume 20, Issue 1 (26/02/2013)  
Author: Didenkulova, I.
Volume: Vol. 20, Issue 1
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2013
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Rodin, A., & Didenkulova, I. (2013). A Typical Wave Wake from High-speed Vessels: Its Group Structure and Run-up : Volume 20, Issue 1 (26/02/2013). Retrieved from http://www.netlibrary.net/


Description
Description: Laboratory of Wave Engineering, Institute of Cybernetics at Tallinn University of Technology, Akadeemia tee 21, 12618 Tallinn, Estonia. High-amplitude water waves induced by high-speed vessels are regularly observed in Tallinn Bay, the Baltic Sea, causing intense beach erosion and disturbing marine habitants in the coastal zone. Such a strong impact on the coast may be a result of a certain group structure of the wave wake. In order to understand it, here we present an experimental study of the group structure of these wakes at Pikakari beach, Tallinn Bay. The most energetic vessel waves at this location (100 m from the coast at the water depth 2.7 m) have amplitudes of about 1 m and periods of 8–10 s and cause maximum run-up heights on a beach up to 1.4 m. These waves represent frequency modulated packets where the largest and longest waves propagate ahead of other smaller amplitude and period waves. Sometimes the groups of different heights and periods can be separated even within one wave wake event. The wave heights within a wake are well described by the Weibull distribution, which has different parameters for wakes from different vessels. Wave run-up heights can also be described by Weibull distribution and its parameters can be connected to the parameters of the distribution of wave heights 100 m from the coast. Finally, the run-up of individual waves within a packet is studied. It is shown that the specific structure of frequency modulated wave packets, induced by high-speed vessels, leads to a sequence of high wave run-ups at the coast, even when the original wave heights are rather moderate. This feature can be a key to understanding the significant impact on coasts caused by fast vessels.

Summary
A typical wave wake from high-speed vessels: its group structure and run-up

Excerpt
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