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      Loss of geomorphic diversity in shallow tidal embayments promoted by storm-surge barriers

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          Abstract

          Coastal flooding prevention measures, such as storm-surge barriers, are being widely adopted globally because of the accelerating rise in sea levels. However, their impacts on the morphodynamics of shallow tidal embayments remain poorly understood. Here, we combine field data and modeling results from the microtidal Venice Lagoon (Italy) to identify short- and long-term consequences of flood regulation on lagoonal landforms. Artificial reduction of water levels enhances wave-induced sediment resuspension from tidal flats, promoting in-channel deposition, at the expense of salt marsh vertical accretion. In Venice, we estimate that the first 15 closures of the recently installed mobile floodgates operated between October 2020 and January 2021 contributed to a 12% reduction in marsh deposition, simultaneously promoting a generalized channel infilling. Therefore, suitable countermeasures need to be taken to offset these processes and prevent significant losses of geomorphic diversity due to repeated floodgate closures, whose frequency will increase as sea levels rise further.

          Abstract

          Storm-surge barriers modify tidal landforms and habitats, changing water flow and sediment transport in coastal environments.

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          The value of the world's ecosystem services and natural capital

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            The value of estuarine and coastal ecosystem services

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              GENERAL CIRCULATION EXPERIMENTS WITH THE PRIMITIVE EQUATIONS: I. THE BASIC EXPERIMENT*

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                Author and article information

                Contributors
                Role: ConceptualizationRole: Formal analysisRole: InvestigationRole: MethodologyRole: SoftwareRole: ValidationRole: VisualizationRole: Writing - original draftRole: Writing - review & editing
                Role: ConceptualizationRole: Formal analysisRole: InvestigationRole: MethodologyRole: SoftwareRole: ValidationRole: VisualizationRole: Writing - original draftRole: Writing - review & editing
                Role: ConceptualizationRole: Funding acquisitionRole: Project administrationRole: SupervisionRole: ValidationRole: Writing - review & editing
                Role: Formal analysisRole: MethodologyRole: SoftwareRole: VisualizationRole: Writing - review & editing
                Role: ConceptualizationRole: Formal analysisRole: InvestigationRole: SoftwareRole: ValidationRole: Writing - review & editing
                Role: MethodologyRole: SoftwareRole: Writing - review & editing
                Role: MethodologyRole: SoftwareRole: Writing - review & editing
                Role: ConceptualizationRole: MethodologyRole: Writing - review & editing
                Role: Formal analysisRole: Funding acquisitionRole: MethodologyRole: SupervisionRole: VisualizationRole: Writing - review & editing
                Role: ConceptualizationRole: Funding acquisitionRole: InvestigationRole: MethodologyRole: Project administrationRole: SoftwareRole: SupervisionRole: Writing - review & editing
                Journal
                Sci Adv
                Sci Adv
                sciadv
                advances
                Science Advances
                American Association for the Advancement of Science
                2375-2548
                April 2022
                01 April 2022
                : 8
                : 13
                : eabm8446
                Affiliations
                [1 ]University of Padova, Department of Civil, Environmental, and Architectural Engineering, IT-35131 Padova, Italy.
                [2 ]University of Padova, Center for Lagoon Hydrodynamics and Morphodynamics (C.I.Mo.La.), IT-35131 Padova, Italy.
                [3 ]Ca’ Foscari University of Venice, Department of Environmental Sciences, Informatics and Statistics, IT-30172 Mestre, Venice, Italy.
                [4 ]University of Padova, Department of Geosciences, Padova, IT-35131 Padova, Italy.
                [5 ]University of Calabria, Department of Environmental Engineering, IT-87036 Cosenza, Italy.
                Author notes
                [* ]Corresponding author. Email: davide.tognin@ 123456phd.unipd.it (D.T.); alvise.finotello@ 123456unive.it (A.F.)
                [†]

                These authors contributed equally to this work.

                Author information
                https://orcid.org/0000-0002-8527-0995
                https://orcid.org/0000-0003-2563-8062
                https://orcid.org/0000-0003-1172-8278
                https://orcid.org/0000-0003-0824-3990
                https://orcid.org/0000-0002-5277-7941
                https://orcid.org/0000-0002-5534-7170
                https://orcid.org/0000-0003-2907-8023
                https://orcid.org/0000-0001-5872-0666
                https://orcid.org/0000-0002-1493-6913
                https://orcid.org/0000-0002-2272-2616
                Article
                abm8446
                10.1126/sciadv.abm8446
                10938579
                35363513
                144fb2c4-7c55-492f-a0da-3899ce0da734
                Copyright © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

                This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.

                History
                : 15 October 2021
                : 10 February 2022
                Funding
                Funded by: FundRef http://dx.doi.org/10.13039/501100003500, Università degli Studi di Padova;
                Award ID: BIRD199419
                Funded by: Provveditorato for the Public Works of Veneto, Trentino Alto Adige and Friuli Venezia Giulia;
                Award ID: Venezia2021 - Research Line 3.2
                Categories
                Research Article
                Earth, Environmental, Ecological, and Space Sciences
                SciAdv r-articles
                Geology
                Environmental Studies
                Environmental Studies
                Custom metadata
                Eunice Diego

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