Analysis and modelling of cross-shore profile of gravel beaches in the province of Alicante

López, Isabel; Aragonés, Luís; Villacampa, Yolanda

doi:10.1016/j.oceaneng.2016.04.008

Cited by 7 publications

(14 citation statements)

References 42 publications

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“…The following section describes the process used to select the variables that influence parameters A and B of the power function of the gravel beach equilibrium profile obtained by López et al (2016) for the area situated between the mean water level and the Posidonia oceanica meadow. Secondly, the procedure followed for modelling them is explained.…”

Section: Methodsmentioning

confidence: 99%

“…These include parametric models (e.g., Powell (1990)) and processbased models (e.g., Clarke et al (2004); Jamal et al (2014); Masselink and Li (2001);Pedrozo-Acuña et al (2006)). Thus, authors like Powell (1990), Van der Meer (1988) or López et al (2016), suggest a power function for the equilibrium profile of gravel beaches, specifically for the area between mean water level (MWL) and step (Equation 1).…”

Section: Introductionmentioning

confidence: 99%

“…ii) Develop a methodology that allows us to select the most important variables. iii) Define and test a model that allows us to obtain parameters A and B proposed by López et al (2016) for the profile between the mean water level and the Posidonia oceanica meadow, which were obtained through field measurements.…”

Section: Introductionmentioning

confidence: 99%

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Gravel beaches nourishment: Modelling the equilibrium beach profile

López

Aragonés

Villacampa

et al. 2018

Science of The Total Environment

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The erosion of the world's coasts and the shortage of sand to mitigate beach erosion are leading to the increasingly common use of gravel for coastal protection and beach nourishment. Therefore, in order to determine the amount of gravel required for such actions, it is important to know perfectly the equilibrium profile of gravel beaches. However, at present, this profile is obtained from formulas obtained mainly after channel tests, and therefore most of them do not adapt to the real profiles formed by gravel beaches in nature. In this article, 31 variables related to sedimentology, waves, morphology and marine vegetation present on the beaches are studied to determine which are the most influential in the profile. From the study carried out, it is obtained that these variables are the steepness and probability of occurrence of the wave perpendicular to the coast, the profile starting slope (between MWL and -2m), the energy reduction coefficient due to Posidonia oceanica as well as the width of the meadow. Using these variables, different numerical models were generated to predict accurately the gravel beach profile, which will lead to a saving in the volume of material used in the order of 1300m/ml of beach with respect to current formulations, and a greater certainty that the beach nourishment carried out will have the desired effect.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Gravel beaches nourishment: Modelling the equilibrium beach profile

López

Aragonés

Villacampa

et al. 2018

Science of The Total Environment

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“…The range of astronomical tides on the shores of Alicante is estimated to be between 8 cm and 10 cm, but occasionally the meteorological tides can play an important role in coastal erosion. Waves can reach up to 4.5 m in height in the area with significant erosional consequences on the shoreline [38] when strong easterly winds during autumn and winter run into high astronomical and meteorological tides. .…”

Section: Study Areamentioning

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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“…Among the materials that make up the beaches, there are gravel and sand; thus, beaches can be classified into five groups depending on the content of sand and its distribution on the cross-shore profile [25]. It has also been observed that the coastline of gravel beaches are practically stable over time [26], while the sand beaches suffer severe erosion problems [27]. Therefore, the latter must be studied further.…”

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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Analysis and modelling of cross-shore profile of gravel beaches in the province of Alicante

Cited by 7 publications

References 42 publications

Gravel beaches nourishment: Modelling the equilibrium beach profile

Gravel beaches nourishment: Modelling the equilibrium beach profile

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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