Static bay beach concept for scientists and engineers: A review

Hsu, John R. C.; Yu, Ming-Jen; Lee, F.-C.; Benedet, Lindino

doi:10.1016/j.coastaleng.2009.09.004

Cited by 80 publications

(64 citation statements)

References 17 publications

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“…The results appear consistent with long term stability of shoreline in naturally and artificially protected headland-bay beaches, as from modelling of landforms over both Oceanic (Thomas et al, 2010;Hsu et al, 2010) and Mediterranean (Barsanti et al, 2011) coasts. The link between the behavioural adaptation of local populations strictly inhabiting sandy beaches, such as talitrids, and shoreline stability provided by natural and/or artificial headlands represent useful information for integrate (biotic and sedimentary) monitoring of coastal processes, and for the interpretation of species adaptation to changing environments.…”

Section: Behavioural Adaptation As a Bioindicator Of Shoreline Stabilitysupporting

confidence: 84%

“…To each of the selected beaches an index of beach use (Recreation and Conservation, integrating in a final score both natural and human features of the beach-dune system) was assigned (McLachlan et al, 2013). The approach of this study was based on current models developed in coastal engineering regarding the concept of "static bay beach" (Hsu et al, 2010;Barsanti et al, 2011). According to this concept, a pocket beach would be stable, while an extended beach would be subject to longshore sediment transport depending on the dominant winds, currents and waves, and thus to changes as a consequence of human actions and man-made interruptions (Barsanti et al, 2011).…”

Section: Behaviour Of Talitrids and Man-made Structures: Open Questionsmentioning

confidence: 99%

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Talitrid orientation as bioindicator of shoreline stability: Protected headland-bays versus exposed extended beaches

Scapini

Gambineri

Rossano

et al. 2015

Ecological Indicators

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a b s t r a c tThe behaviour of talitrids, being a local adaptation to beaches, is known to be related to environmental stability. The use of behavioural responses of resident populations as bioindicator of shoreline stability has been tested under various conditions, including after soft and hard engineering actions to stabilise eroded beaches. Port structures likely have impact on sediment longshore transportation and shoreline stability. The question was whether talitrid orientation behaviour could be proposed as bioindicator of impacts also for sandy bays of limited extension and highly used for recreation, such as those in the vicinity of touristic port structures. Orientation experiments were carried out on a set of sandy beaches of different extension and morphology, each of them in the vicinity of a touristic port, across the Mediterranean coasts. The protocol included field orientation tests of populations of talitrids, then analysed in terms of orientation precision seawards (considering sun compass orientation as the most locally adapted behavioural mechanism) in different seasons (before and after the touristic season) and times of day. The populations from more protected (either naturally or artificially) headland-bays showed a higher precision of orientation with respect to the shoreline direction than those from extended beaches, more subject to changes in longshore sedimentary transport as consequence of natural and human activities. The distance from the port and touristic pressure had no influence on talitrid orientation. An important stabilising factor for the sandy beach ecosystems, including talitrid populations and their behavioural adaptation, appeared to be the presence of seagrass banquette. The behavioural data point out that biotic information proceeding from local animal populations linked to beach sediments may complement sedimentology data and allow scaling the impacts occurring on a developed coastline. This becomes particularly relevant when considering interdisciplinary approaches to monitoring strategies.

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Section: Behavioural Adaptation As a Bioindicator Of Shoreline Stabilitysupporting

confidence: 84%

Section: Behaviour Of Talitrids and Man-made Structures: Open Questionsmentioning

confidence: 99%

Talitrid orientation as bioindicator of shoreline stability: Protected headland-bays versus exposed extended beaches

Scapini

Gambineri

Rossano

et al. 2015

Ecological Indicators

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“…It is often mentioned in the literature that the geological setting (i.e., topography, geometry, headland position, orientation of the bay) plays a significant role in determining the bay shape (Hsu et al, 2010;Short, 2010) as it is strongly coupled with the steering of wave-driven currents, causing cellular circulation patterns to develop in the bay (Klein and Menezes, 2001;Silva et al, 2010). The development of cellular circulation is shown to be dependent on the length of the bay relative to width of the surf zone (Short and Masselink, 1999) -short, compact embayments generally feature single circulation cells while larger embayments allow room for more normal (open-coast) circulation -and, additionally, the degree of curvature, which affects the indentation of the bay (Silvester and Hsu, 1997).…”

Section: Introductionmentioning

confidence: 99%

On the morphological development of embayed beaches

2015

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“…Hsu et al (2010) reviewed the research related to HBB and the PBSE for several practical examples, in which the PBSE is verified for both natural and man-made bay beaches and applied for shoreline protection, reduction of erosion downcoast of harbors or large coastal structures, design of recreational HBB, and for environmental impact assessment. These examples indicate that the PBSE of Hsu and Evans (1989) is popular and useful in various engineering applications.…”

Section: Parabolic Bay Shape Equation (Pbse)mentioning

confidence: 99%

Experimental study on dynamic equilibrium of headland-bay beaches

Tasaduak

Weesakul

2016

J Coast Conserv

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A dynamic equilibrium bay (DEB) is an embayment with continuous sediment supply and its shoreline planform can remain stable over a long period of time without erosion or accretion. For coastal conservation of sandy headland-bay beaches (HBB), the concept of using a static equilibrium bay (SEB) is well known, but that for DEB has received little attention. Moreover, an empirical equation for the stability of a DEB is not yet available. Experiments on DEB shape that aim to derive new coefficients in the parabolic bay shape equation (PBSE) for DEB are now being conducted in the laboratory. The work commences from an initial artificial HBB in static equilibrium with sediment supply source from the lee of an upcoast headland. A final equilibrium planform is obtained for the condition with a specific wave obliquity and sediment supply rate until no further shoreline change is found. In order to fit the PBSE for a DEB, a new parameter called SSR (sediment supply ratio) that represents the ratio of sediment supply rate from the source and the potential longshore sediment transport rate is introduced to quantify the balance of sediment to the bay. Alternative C coefficients in the PBSE for DEB, which include wave obliquity and the SSR, are then calculated. These new coefficients for DEB can now be used to evaluate the influence of sediment supply from a riverine source on a DEB and to classify its equilibrium status for planning sediment management strategies in coastal conservation.

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Static bay beach concept for scientists and engineers: A review

Cited by 80 publications

References 17 publications

Talitrid orientation as bioindicator of shoreline stability: Protected headland-bays versus exposed extended beaches

Talitrid orientation as bioindicator of shoreline stability: Protected headland-bays versus exposed extended beaches

On the morphological development of embayed beaches

Experimental study on dynamic equilibrium of headland-bay beaches

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