Beach nourishment impact on Posidonia oceanica: Case study of Poniente Beach (Benidorm, Spain)

Aragonés, Luís; García-Barba, Javier; García-Bleda, Eduardo; López, Isabel; Serra, José Cristobal

doi:10.1016/j.oceaneng.2015.07.005

Cited by 35 publications

(20 citation statements)

References 15 publications

(21 reference statements)

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“…The factors that influence the functioning of a beach are of different nature: on the one hand, there are the parameters that depend on the anthropogenic action that exists in the area, (Aragonés et al, 2015;Aragonés et al, 2016a;Pagán et al, 2016) and on the other hand, natural factors such as morphology, mineralogical composition of sediments or the maritime climate (López et al, 2016a;López et al, 2016b;Marcomini and López, 1997;Roberts et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Causes of the different behaviour of the shoreline on beaches with similar characteristics. Study case of the San Juan and Guardamar del Segura beaches, Spain

Pagán

López

et al. 2018

Science of The Total Environment

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Storms can alter the beach shape, relocating large volumes of sediments and generating drastic changes in the coastline. In the last 60years, beaches shoreline behaviour has been different even though the energy of the waves was similar. Therefore, it is necessary to understand the factors that affect the sandy coasts for better future management. In this research, two beaches, with different erosion rate, located in the southeast of Spain (separated by only 40km of distance) have been studied. The beaches: i) have similar orientations, ii) are open to waves with similar sand lengths of 9.8km and 6.6km, and iii) have similar median sediment size (D). For its study, shoreline evolution has been analysed from 1956 to 2017. From the results obtained, it can be seen that: i) Between 1992 and 2017, San Juan just lost 3% of its surface, while in the previous period (1956-1990) it was 50%, and ii) Guardamar surface lost in 1992-2017 was 18%, and in the previous period it was 14%. For the analysis of the agents involved in both beaches, cross-shore profiles (volume), marine climate, biocenosis and sedimentology studies were carried out. The results showed that the energy on both beaches was very similar. The biocenosis had not changed and, however, the morphology of Guardamar seabed had increased to 1m deep in some places, which had caused part of the beach berm erosion. Furthermore, important differences were found from the sedimentological study, concluding that the content of calcites and the degree of homogeneity of the particles are the real factors that caused these two beaches to behave differently against erosion.

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Section: Introductionmentioning

confidence: 99%

Causes of the different behaviour of the shoreline on beaches with similar characteristics. Study case of the San Juan and Guardamar del Segura beaches, Spain

Pagán

López

et al. 2018

Science of The Total Environment

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“…This coast experiences a severe pressure of tourist inflow, and several beaches are subject to erosion (example study cases are References [53][54][55][56][57]). Artificial nourishment of beaches is common in this region, notably between 1985 and 1999 [58].…”

Section: Discussionmentioning

confidence: 99%

3-D Morphological Change Analysis of a Beach with Seagrass Berm Using a Terrestrial Laser Scanner

Corbí

Riquelme

Megías-Baños

et al. 2018

IJGI

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Along many Mediterranean coasts, the detached seagrass material of Posidonia oceanica creates seagrass berms that control the structure and morphodynamics of sandy beaches. Here, we show how Terrestrial Laser Scanner remote sensing data allows analyzing the 3-D morphologic change of beaches where this characteristic geomorphic structure is present. We propose a methodology for estimating accretion/erosion (almost −200 m 3 in our study) by considering the sand dominated and seagrass berms as two independent elements. For this purpose, two different sampling dates (named scenarios A and B, before and after an erosive heavy storms period, respectively) recorded in a microtidal pocket-beach (300 m 2 ) with these characteristic geomorphic structures have been modeled in 3-D. The present approach constitutes a cost-efficient, accurate, and quick tool to survey the sand volume in natural and artificial replenished beaches. The innovative approach, which can be considered as a conceptual and methodological starting point, can be useful to examine long-term and high-precision data sets in future studies of the morphodynamic evolution of these characteristic Mediterranean beaches.

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“…Therefore, there is more and more criticism for dredging and regulations are stricter [28]. In addition, the uncontrolled process of nourishment of a beach can generate silting of some plant species (such as Posidonia oceanica) and, therefore, an imbalance in the profile and increase in erosion [29]. To reduce beach erosion, the use of breakwater in the coastal areas to prevent movement of sediments is common, both transversely and longitudinally, which generates a significant environmental impact within and outside the performance area [30,31] (Fig.…”

Section: Factors Affecting Coastal Erosionmentioning

confidence: 99%

Factors influencing the retreat of the coastline

López¹,

Pagán²,

López³

et al. 2017

Int. J. CMEM

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One of the main problems of coastlines around the world is their erosion. There are many studies that have tried to link coastal erosion with different parameters such as: maritime climate, sediment transport, sea level rise etc. However, it is unclear to what extent these factors influence coastal erosion. For example, the Intergovernmental Panel on Climate Change (IPCC) has predicted an increase in sea level at a much faster rate than that experienced in the first part of this century, reaching 1 m of elevation in some areas. Another factor to consider is the lack of sediment supply, since currently the contribution of new sediments from rivers or ravines is interrupted by anthropic activities carried out in their basins (dams, channelling, etc.). The big storms, increasingly frequent due to climate change, also should be considered, since they produce an offshore sediments transport, so that these cross the depth of closure, causing nonreturn of the sediment to the beach. Also, the sediment undergoes a process of wear due to various reasons such as the dissolution of the carbonate fraction and/or breakage and separation of the components of the particles. All these elements, to a greater or lesser extent, lead to the retreat of the coastline. Therefore, the aim of this study is to analyse the different factors causing the retreat of the coastline, in order to determine the degree of involvement of each of them and, therefore, be able to pose different proposals to reduce the consequences of coastal erosion.

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Beach nourishment impact on Posidonia oceanica: Case study of Poniente Beach (Benidorm, Spain)

Cited by 35 publications

References 15 publications

Causes of the different behaviour of the shoreline on beaches with similar characteristics. Study case of the San Juan and Guardamar del Segura beaches, Spain

Causes of the different behaviour of the shoreline on beaches with similar characteristics. Study case of the San Juan and Guardamar del Segura beaches, Spain

3-D Morphological Change Analysis of a Beach with Seagrass Berm Using a Terrestrial Laser Scanner

Factors influencing the retreat of the coastline

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