Spectral Analysis Of Water Surface Elevations
Near Submerged Breakwaters
Author(s)
F. Taveira-Pinto & A. C. Neves
Abstract
Submerged breakwaters are one solution to prevent coastal erosion problems,
achieving a greater protection to the coastline, decreasing the risk of erosion and
helping sand accretion. Due to their lower crest height, they do not eliminate
landward transport and can be successfully used in some cases. Their efficiency
depends on the relation between the incident wave height and the correspondent
reflected and transmitted one.
Understanding of wave energy transmission is also an important aspect in the
design of these structures. Several studies were conducted in order to understand
with more accuracy the behaviour of submerged breakwaters and this article
intends to analyse the performance of these structures when submitted to the
action of incident irregular waves, in respect of the transmission of the wave
energy.
The wave transmission can be analysed through the incident and the
transmitted significant wave heights calculated through the measured free
surface elevation. However, focussing the analysis on the shape of the registered
wave spectra, it is also possible to verify some other characteristics related to the
transfer of energy between wave frequencies.
1 Introduction
Submerged breakwaters are becoming a popular solution to prevent coastal
erosion as, from the sustainability, the environmental and the aesthetical points
of view (one of the major engineering priorities at the moment) they do not have
so many disadvantages as the called \“hard structures” like groins, detached
breakwaters, revetments, seawalls, etc. These structures are designed to attenuate
Keywords
Related Book
Other papers in this volume
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