Morphological classification of microtidal sand and gravel beaches

López, Isabel; Aragonés, Luís; Villacampa, Yolanda; Compañ, Patricia; Satorre, Rosana

doi:10.1016/j.oceaneng.2015.09.021

Cited by 8 publications

(4 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to the morphology, beaches can be distinguished in four types, as proposed by López et al [12]. The results of the concentrations obtained according to morphology are reflected in Table 4.…”

Section: Resultsmentioning

confidence: 92%

Determination of the most influential factors in the concentration of bacteria in coastal waters

Palazón¹,

Aragonés²,

López³

et al. 2018

Int. J. EI

Self Cite

View full text Add to dashboard Cite

Control of water quality of coastal waters is essential to ensure the safety of bathers. Therefore, the current legislation establishes maximum concentration levels of faecal bacteria, in particular Escherichia coli and intestinal Enterococci. After several studies, it is known that there are environmental and physical factors such as the level of urbanization of the beach, sediment type, rainfall, salinity and water temperature, which influence the concentration of these bacteria. However, there are many other factors, such as the morphology of the beach, its orientation relative to waves and the proximity of spills, that can affect the survival of these bacteria and therefore directly influence the water quality in the coastal zone. In this article, 270 beaches between the provinces of Valencia and Granada (Spain) were analysed. It was observed that the local factors that further affect the concentration of faecal bacteria in coastal water are the presence of meadows of Posidonia oceanica, the orientation of the beach with respect to the direction of the most common incident waves and the agricultural discharges in the sea.

show abstract

Section: Resultsmentioning

confidence: 92%

Determination of the most influential factors in the concentration of bacteria in coastal waters

Palazón¹,

Aragonés²,

López³

et al. 2018

Int. J. EI

Self Cite

View full text Add to dashboard Cite

show abstract

“…The results showed that clump super particles can effectively make up the difference between traditional spherical particles and real materials. In order to improve the calculation accuracy and calculation efficiency, the author referred to reference [30,31], focusing on the simulation of the 3D shape of gravel particles (greater than 5 mm), using the equal-size particles with a diameter of 5 mm to simulate the sand particles, which reached the balance of accuracy and efficiency.…”

Section: D Morphological Evaluation Parameters Of Particlesmentioning

confidence: 99%

3D Morphology Distribution Characteristics and Discrete Element Simulation of Sand-Gravel Mixtures

Suyu

Guangliang³

et al. 2021

Geofluids

View full text Add to dashboard Cite

Sand-gravel mixtures are typical binary materials, exhibiting highly heterogeneous, discontinuous, and significant structural effects. The contact state between sand and gravel particles has a significant influence on the mechanical properties of the mixtures. This article focused on the complex internal structure and its mesostructural behavior of the mixtures, and a systematic statistical analysis was carried out to study the shape, size, and angularity of the coarse particles. The three-dimensional (3D) shapes of coarse aggregates were approximated to be hexahedron, pentahedron, and tetrahedron. An indicator called angularity and surface texture (AT) index was developed to characterize the combined effect of the coarse aggregate angularity and surface texture. Based on the screening testing and digital image processing, the particle size and AT index of aggregates were extracted, and their means, standard deviations, and statistical distributions were studied. An algorithm for generating 3D aggregates was developed based on the statistical results of the coarse aggregate 3D morphology. The coarse aggregate generating code was written using the fish language in PFC3D. The numerical model was then applied to conduct three typical monotonic or cyclic triaxial test simulations. Retrospective simulation of the laboratory tests using the proposed model showed good agreement, and the reliability of the model is effectively verified. The results interpreted well the mechanism of particle motion and the distribution of interparticle contact force during shearing from mesoscale of the mixtures, which can give better understanding and modeling of the nonlinear behavior of the sand-gravel mixtures.

show abstract

“…Regarding the physical characteristics, beach morphology was divided into four groups (open, supported, bi-supported and enclosed) as were proposed by López et al (2015). The beaches were classified into 16 groups according to their orientation as follows: A perpendicular line was drawn from the coastline of each beach, thereby enabling us to read its orientation as given by the wind rose.…”

Section: Data Collectionmentioning

confidence: 99%

Modelling of Escherichia coli concentrations in bathing water at microtidal coasts

Palazón

López

Aragonés

et al. 2017

Science of The Total Environment

Self Cite

View full text Add to dashboard Cite

Monitoring of the quality of bathing water in line with the European Commission bathing water directive (Directive 2006/7/EC) is a significant economic expense for those countries with great lengths of coastline. In this study a numerical model based on finite elements is generated whose objective is partially substituting the microbiological analysis of the quality of coastal bathing waters. According to a study of the concentration of Escherichia coli in 299 Spanish Mediterranean beaches, it was established that the most important variables that influence the concentration are: monthly sunshine hours, mean monthly precipitation, number of goat cattle heads, population density, presence of Posidonia oceanica, UV, urbanization level, type of sediment, wastewater treatment ratio, salinity, distance to the nearest discharge, and wave height perpendicular to the coast. Using these variables, a model with an absolute error of 10.6±1.5CFU/100ml is achieved. With this model, if there are no significant changes in the beach environment and the variables remain more or less stable, the concentration of E. coli in bathing water can be determined, performing only specific microbiological analyses to verify the water quality.

show abstract

Morphological classification of microtidal sand and gravel beaches

Cited by 8 publications

References 36 publications

Determination of the most influential factors in the concentration of bacteria in coastal waters

Determination of the most influential factors in the concentration of bacteria in coastal waters

3D Morphology Distribution Characteristics and Discrete Element Simulation of Sand-Gravel Mixtures

Modelling of Escherichia coli concentrations in bathing water at microtidal coasts

Contact Info

Product

Resources

About