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Special Issue "Study of Lagoons and Other Shallow Water Bodies Through the Application of Numerical Models"

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydrology".

Deadline for manuscript submissions: 1 March 2019

Special Issue Editors

Guest Editor
Prof. Dr. Georg Umgiesser

ISMAR-CNR, ISMAR Istituto di Scienze Marine-Arsenale - Tesa 104, Castello 2737/F, 30122 Venezia, Italy
Website | E-Mail
Interests: hydrodynamic modelling; finite elements; water residence time; model integration; modelling lagoons; river-delta-sea systems
Guest Editor
Prof. Dr. Angel Perez-Ruzafa

Department of Ecology and Hydrology, Faculty of Biology, Regional Campus of International Excellence Mare Nostrum, University of Murcia, 30100, Spain
Website | E-Mail
Interests: marine ecology; coastal lagoons; echinoderms; fish; marine protected areas; connectivity
Guest Editor
Prof. Dr. Artūras Razinkovas-Baziukas

Marine Research Institute, Klaipėda University, H. Manto str. 84, Klaipėda, Lithuania
Website | E-Mail
Interests: estuarine ecology; ecological modelling; ecosystem services

Special Issue Information

Dear Colleagues,

Numerical modeling, from hydrodynamics to population dynamics, eutrophication processes, food webs or ecosystem services, has become an important tool in the environmental sciences. Modeling can be used to integrate observations interpolate these data in the spatial and temporal dimension. However, modeling can also be used for forecasting and “what-if” predictions. Modeling in transitional areas, such as lagoons and coastal zones, show big differences with respect to the open sea. The strong influence of land-based inputs, the relative importance of sediments and the atmosphere, and man-made influences on the water bodies distinguish these areas from open waters and ask for different techniques in modeling. Especially, the use of unstructured numerical grids allows a faithful reproduction of the spatial complexity found in transitional areas. Finally, integration of different models is needed to describe the complexity of processes that are occuring in lagoons and the coastal zone. Special focus should be given to ensure that these models work smoothly together.

Prof. Dr. Georg Umgiesser
Prof. Dr. Angel Perez-Ruzafa
Prof. Dr. Artūras Razinkovas-Baziukas
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1500 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

  • hydrodynamic modeling
  • unstructured grids
  • ecosystem modeling
  • food web modeling
  • integrations of different scales of models
  • exchange capabilities with the open sea
  • Bayesian Belief Networks

Published Papers (4 papers)

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Research

Open AccessArticle North Sea Ecosystem-Scale Model-Based Quantification of Net Primary Productivity Changes by the Benthic Filter Feeder Mytilus edulis
Water 2018, 10(11), 1527; https://doi.org/10.3390/w10111527
Received: 6 July 2018 / Revised: 20 October 2018 / Accepted: 22 October 2018 / Published: 26 October 2018
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Abstract
Blue mussels are among the most abundant bivalves in shallow water along the German coasts. As filter feeders, a major ecosystem service they provide is water filtration and the vertical transfer of suspended organic and attached inorganic material to the sea floor. Laboratory
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Blue mussels are among the most abundant bivalves in shallow water along the German coasts. As filter feeders, a major ecosystem service they provide is water filtration and the vertical transfer of suspended organic and attached inorganic material to the sea floor. Laboratory and field studies previously demonstrated that blue mussels can remove large quantities of plankton from the surrounding water. I here perform numerical experiments that investigate the effect of filtration at the scale of an entire coastal sea—the southern North Sea. These experiments were performed with a state-of-the-art bentho-pelagic coupled hydrodynamic and ecosystem model and used a novel reconstruction of the benthic biomass distribution of blue mussels. The filtration effect was assessed as the simulated change in net primary productivity caused by blue mussels. In shallow water, filtration takes out up to half of the entire annual primary productivity; it is negligible in offshore waters. For the entire basin, the filtration effect is 10%. While many ecosystem models have a global parameterization for filter feeders, the coastal gradient in the filtration effect is usually not considered; our research demonstrates the importance of including spatially heterogeneous filtration in coupled bentho-pelagic ecosystem models if we want to better understand the spatial patterns in shallow water coastal systems. Full article
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Open AccessArticle On the Wave Bottom Shear Stress in Shallow Depths: The Role of Wave Period and Bed Roughness
Water 2018, 10(10), 1348; https://doi.org/10.3390/w10101348
Received: 6 September 2018 / Revised: 24 September 2018 / Accepted: 25 September 2018 / Published: 28 September 2018
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Abstract
Lagoons and coastal semi-enclosed basins morphologically evolve depending on local waves, currents, and tidal conditions. In very shallow water depths, typical of tidal flats and mudflats, the bed shear stress due to the wind waves is a key factor governing sediment resuspension. A
[...] Read more.
Lagoons and coastal semi-enclosed basins morphologically evolve depending on local waves, currents, and tidal conditions. In very shallow water depths, typical of tidal flats and mudflats, the bed shear stress due to the wind waves is a key factor governing sediment resuspension. A current line of research focuses on the distribution of wave shear stress with depth, this being a very important aspect related to the dynamic equilibrium of transitional areas. In this work a relevant contribution to this study is provided, by means of the comparison between experimental growth curves which predict the finite depth wave characteristics and the numerical results obtained by means a spectral model. In particular, the dominant role of the bottom friction dissipation is underlined, especially in the presence of irregular and heterogeneous sea beds. The effects of this energy loss on the wave field is investigated, highlighting that both the variability of the wave period and the relative bottom roughness can change the bed shear stress trend substantially. Full article
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Open AccessFeature PaperArticle Assessing the Hydrodynamic Response of the Mar Menor Lagoon to Dredging Inlets Interventions through Numerical Modelling
Water 2018, 10(7), 959; https://doi.org/10.3390/w10070959
Received: 9 May 2018 / Revised: 30 June 2018 / Accepted: 17 July 2018 / Published: 20 July 2018
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Abstract
The Mar Menor lagoon has been subjected to high anthropogenic pressures. Among them, in the early 1970s, dredging and enlargement of one of the inlets to make a navigable channel has had strong consequences on the hydrology, ecology, and fisheries of the lagoon.
[...] Read more.
The Mar Menor lagoon has been subjected to high anthropogenic pressures. Among them, in the early 1970s, dredging and enlargement of one of the inlets to make a navigable channel has had strong consequences on the hydrology, ecology, and fisheries of the lagoon. In recent years, changes in agricultural practices have induced an eutrophication process, leading to loss of water quality. As a solution, some management proposals have included dredging of the inlets in order to increase the water renewal. However, these proposals did not take into account the negative effects of previous experiences nor the consequences on environmental conditions of the lagoon and therefore on biological processes. The purpose of this work is to assess the effect that proposed mitigation measures, could have on the hydrodynamic conditions and discuss its possible ecological consequences. A three-dimensional (3D) numerical model has been used to simulate the lagoon under different dredging scenarios, covering different dredging depths and extensions. The simulated current fields and fluxes through the inlets, as well as water renewal times have been compared for the different scenarios. It is found that some of the considered scenarios take the system beyond the threshold of sustainability, where the modified current dynamics could affect sediment transport, beach dynamics and fishing capacities in a significant way. Water exchange with the Mediterranean is also strongly affected, with consequences for species connectivity, and a homogenization of the water renewal times that could lead to loss of ecosystem heterogeneity and structural complexity. The study demonstrates the utility of numerical models as effective tools for the management of coastal areas. Full article
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Open AccessArticle A Novel Multislope MUSCL Scheme for Solving 2D Shallow Water Equations on Unstructured Grids
Water 2018, 10(4), 524; https://doi.org/10.3390/w10040524
Received: 8 March 2018 / Revised: 15 April 2018 / Accepted: 19 April 2018 / Published: 21 April 2018
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Abstract
Within the framework of the two-dimensional cell-centered Godunov-type finite volume (CCFV) method, this paper presents a novel multislope scheme on the basis of the monotone upstream scheme for conservation law (MUSCL) for numerically solving nonlinear shallow water equations on two-dimensional triangular grids. The
[...] Read more.
Within the framework of the two-dimensional cell-centered Godunov-type finite volume (CCFV) method, this paper presents a novel multislope scheme on the basis of the monotone upstream scheme for conservation law (MUSCL) for numerically solving nonlinear shallow water equations on two-dimensional triangular grids. The Riemann states of the considered edge are calculated by an edge-based reconstructing procedure, where a limited scalar slope is employed to prevent potential numerical oscillations. The novel aspect of the new scheme is that it takes advantage of the geometrical characteristics of triangular grids in the reconstructing and limiting procedures, which effectively reduces the cost of computation and provides higher resolution and accuracy compared with classical MUSCL schemes. Seven tests are adopted to verify the scheme, and the results indicate that this scheme is efficient, accurate, robust, and high-resolution, and can be an ideal alternative for solving shallow water problems over uneven and frictional topography. Full article
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