0.6 to 0.7, a bell-shaped salient in the shoreline will form in the lee of the breakwater. Salient: When the dimensionless breakwater length L_B^* is less than approx.x_ěreakwater distance relative to surf-zone width.The first type is generally used as ship berth, whereas the latter two types of breakwaters are mainly used for shoreline management.Ī detached emerged breakwater can be characterized by the following parameters (Fig.2): There are three different types of breakwaters, schematically indicated in Fig.1.: These characteristics of a breakwater are utilised in different ways for various types of breakwaters by varying relevant parameters. Through this shelter, to manipulate the littoral transport conditions and thereby to trap some sandĪ detached breakwater provides shelter from the waves, whereby the littoral transport behind the breakwater is decreased and the transport pattern adjacent to the breakwater is modified.Distance from shoreline and location relative to the surf zoneĪ shoreline management breakwater serves two purposes:.The following characteristics determine the impact on the shoreline: Ī special type of detached breakwaters is dealt with in the article Artificial reefs.īreakwater schemes have many variables. Most of the content of this article is drawn from Mangor et al. Different aspects of breakwaters as coastal protection are discussed, as well as their impacts on shoreline evolution. This article provides a general introduction of detached breakwaters and describes emerged breakwaters, submerged or low-crested breakwaters, floating breakwaters and other special type breakwaters. Several types of breakwaters exist, from which detached breakwaters are the most common type. In general terms, a detached breakwater is a coast-parallel structure located inside or close to the surf-zone. 6.2 Disadvantages of submerged/low crested breakwaterĭetached breakwaters aim to protect a coast or activities along the coastline (e.g.6.1 Reasons for selecting a submerged/low breakwater.5 Segmented emerged detached breakwaters.4.3 Optimization of the breakwater design.
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