Coastal Systems Research: Environments, Geomorphology and Sedimentary Processes

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Oceans and Coastal Zones".

Deadline for manuscript submissions: closed (1 April 2023) | Viewed by 8351

Special Issue Editors


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Guest Editor
1. Department of Environmental Sciences Informatics & Statistics, Università Ca' Foscari Venezia, Venice, Italy
2. CNR-IAS, National Research Council of Italy – Institute of Anthropic Impacts and Sustainability in Marine Environment, Oristano, Italy
Interests: sedimentology and morphology of transitional environments; atmospheric depositions; applied sedimentology; provenance of detrital minerals and rock-fragments

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Guest Editor
CNR-IAS, National Research Council of Italy – Institute of Anthropic Impacts and Sustainability in Marine Environment, Oristano, Italy
Interests: sedimentology; coastal morphodynamics; marine geology
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Special Issue Information

Dear Colleagues,

The main focus of this Special Issue is to provide an overview of recent advances in research on coastal systems composed of different morphological types and environments (i.e., barriers, dunes, lagoons, deltas and estuaries) that change rapidly in response to natural and anthropogenic processes.

These areas are an interface between the land and the sea, and are of great environmental and economic importance. During the last century, many coastal areas have experienced high anthropogenic pressure, leading to changes in the sedimentary budget and general loss of resilience which can trigger erosion of beaches, as well as the loss of dunes and wetlands. The consequences of these changes are the reduction of the capacity of coastal systems to protect coastal areas from extreme events and the loss of habitats. These processes will be further accelerated in the coming decades by the rise in sea level due to global climate change, which will involve the retreat and reorganization of coastal systems in ways that will depend on specific local conditions.

In this Special Issue, we welcome studies dealing with, but not limited to, the following topics: the functioning of coastal systems, including coastal morphodynamics, sediment budgets, bio-geomorphology and coastal management applications.

The Special Issue is therefore situated in the wide scientific literature existing on coastal systems and on the integrated management aspects related to it.

Dr. Emanuela Molinaroli
Dr. Giovanni De Falco
Guest Editors

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • coastal landforms
  • coastal morphodynamics
  • sedimentary budget
  • coastal management
  • sea level changes
  • coastal processes
  • coastal erosion
  • lagoons/wetlands evolution
  • coastal zone management

Published Papers (4 papers)

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Research

26 pages, 30355 KiB  
Article
Long-Term Evolution of an Urban Barrier Island: The Case of Venice Lido (Northern Adriatic Sea, Italy)
by Emanuela Molinaroli, Mirco Peschiutta and Federica Rizzetto
Water 2023, 15(10), 1927; https://doi.org/10.3390/w15101927 - 19 May 2023
Cited by 2 | Viewed by 1811
Abstract
The aim of this study was to investigate the long-term changes in the coastal stretch of the Lido barrier island, a 12 km sandy coast bordering the Lagoon of Venice, and to assess the impacts of human interventions in the system. Coastal modifications [...] Read more.
The aim of this study was to investigate the long-term changes in the coastal stretch of the Lido barrier island, a 12 km sandy coast bordering the Lagoon of Venice, and to assess the impacts of human interventions in the system. Coastal modifications were examined in a GIS environment through the analysis of aerial photographs covering the period 1955–2019. To achieve our goal, the study area was divided into three cells (i.e., from north to south, A, B, and C), and the rates of shoreline change were calculated over five subsequent periods (i.e., 1955–1978, 1978–1987, 1987–1996, 1996–2006, and 2006–2019). The results mainly showed a positive trend in the long-term (cell A avg. 2.0 m/year; cell C avg. 1.2 m/year) and moderate erosion (cell A and C avg. 0.9 m/year) in the periods 1996–2006 and 2006–2019, probably due to an increase in the frequency of storm surges. However, major effects on beach erosion and progradation were produced by human interventions. In particular, positive impacts were derived from the shore-normal engineering structures intercepting longshore currents, whereas negative effects were from works functional to the realisation of the MoSE system at the Lido and Malamocco inlets, which reduced the amount of available sediment, thus contributing to the worsening conditions of cells A and C. In view of the expected sea-level rise, this area merits higher consideration for correct spatial planning in the framework of integrated coastal zone management. We suggest that a monitoring program of shoreline evolution must be set up to better manage its future development. Full article
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20 pages, 16080 KiB  
Article
Compatibility between Continental Shelf Deposits and Sediments of Adjacent Beaches along Western Sardinia (Mediterranean Sea)
by Giovanni De Falco, Simone Simeone, Alessandro Conforti, Walter Brambilla and Emanuela Molinaroli
Water 2022, 14(23), 3971; https://doi.org/10.3390/w14233971 - 06 Dec 2022
Viewed by 1742
Abstract
The compatibility of sediments in terms of grain size, composition and colour among beaches and strategic sediment deposits (SSD) along Western Sardinia (Western Mediterranean Sea) were assessed to explore management strategy in the protection and adaptation to counteract the beach erosion and the [...] Read more.
The compatibility of sediments in terms of grain size, composition and colour among beaches and strategic sediment deposits (SSD) along Western Sardinia (Western Mediterranean Sea) were assessed to explore management strategy in the protection and adaptation to counteract the beach erosion and the effect of sea level rise along sandy shores. Twelve beaches, mainly conditioned by geological control, due to the presence of extensive rocky outcrops in the sea, enclosed in seven sedimentary cells (defined by the continuity of sediment transport pathways and by identification of boundaries where there are discontinuities), were characterised in terms of sediment composition and grain size. One hundred ninety-three beach sediments and one hundred sediments from SSDs were collected and analysed for sediment grain size, carbonate content and sediment colour. The beach sediments are composed by gravel to fine sands (D50: from 81 µm to 4986 µm) with siliciclastic and biogenic carbonate sediments mixed in different proportions (0–100% in CaCO3). The SSDs sediments are gravels to medium-fine sand (D50: from 96 µm to 1769 µm) composed by biogenic carbonate sands mixed with siliciclastic grains (0–100% in CaCO3). To be able to evaluate the compatibility between the beaches and SSDs, a multivariate statistical procedure was applied to grain size dataset. Our results show that 8 beaches have strategic deposits of compatible grain size and composition, whereas only 2 beaches have compatible strategic deposits of both grain size and colour. This may be related to the different sediment sources and depositional processes of sediment along the coastal cells and the continental shelf. Full article
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18 pages, 1220 KiB  
Article
Is the Sea the Enemy? Occupation and Anthropogenic Impacts at Costa da Caparica (Portugal)
by Olegário Nelson Azevedo Pereira, Maria Rosário Bastos, José Carlos Ferreira and João Alveirinho Dias
Water 2022, 14(18), 2886; https://doi.org/10.3390/w14182886 - 15 Sep 2022
Cited by 1 | Viewed by 2427
Abstract
This article explores the development of human occupation and the anthropogenic impacts at Costa da Caparica, a Portuguese coastal town that faces several challenges concerning coastal erosion processes. A historical long-term analysis was made, mainly through medieval and modern writing sources, crossing such [...] Read more.
This article explores the development of human occupation and the anthropogenic impacts at Costa da Caparica, a Portuguese coastal town that faces several challenges concerning coastal erosion processes. A historical long-term analysis was made, mainly through medieval and modern writing sources, crossing such textual data with geology, geography, and other related scientific disciplines studies regarding the coastal erosion problems of the study area. Therefore, from the Middle Ages to the present, human actions concerning this area were examined. The sea was first seen as an income, due to tourism, and later seen as a danger. It is argued that human behaviors were the main cause of historical problems and also the present vulnerabilities and risks associated with this coastal stretch of the Portuguese littoral. We must search the past for answers to understand present problems and think about the future. This is the main purpose of this paper: to contribute to a better knowledge concerning coastal sustainability based on the results of past human actions, as a way to avoid such mistakes in the future. Full article
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13 pages, 2941 KiB  
Article
Sediment Budget Implications from Posidonia oceanica Banquette Removal in a Starved Beach System
by Simone Simeone, Antonio Gian Luca Palombo, Fabio Antognarelli, Walter Brambilla, Alessandro Conforti and Giovanni De Falco
Water 2022, 14(15), 2411; https://doi.org/10.3390/w14152411 - 03 Aug 2022
Cited by 4 | Viewed by 1710
Abstract
This study discusses the potential impact of removing Posidonia banquette on the sediment budget of a siliciclastic-sediment-starved beach-barrier system. The morphology as well as the sediment volumes of this system were estimated. The banquette’s composition and sediment content were determined with samples collected [...] Read more.
This study discusses the potential impact of removing Posidonia banquette on the sediment budget of a siliciclastic-sediment-starved beach-barrier system. The morphology as well as the sediment volumes of this system were estimated. The banquette’s composition and sediment content were determined with samples collected during five sampling campaigns conducted in one year. The carbonate content of the system was estimated by analyzing three 1 m long cores collected along the barrier. Five digital terrain models from DGPS surveys were used to compute the beach’s average morphology to estimate the sediment volumes. The carbonate and siliciclastic sediment content from the cores were used to calculate the overall beach’s sediment mass. Total sediment mass accounted for 126,000 m3, of which ca. 86% was siliciclastic quartz sand and approximately 14% was carbonate sediment. Total banquette deposition during the year accounted for 2300 m3, with a maximum and averaged sediment content of 339 kg m3 and 78 kg m−3. A permanent loss of ca. 1.31% of total mass will occur if 5000 m3 of banquette were to be removed. In such beach settings, banquette removal may limit sediment availability, reducing the overall sediment mass and decreasing beach resilience against climate change effects such as sea level rise. Full article
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