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Sediment transport in a tidal inlet: the case of the Lido Inlet, Venice, Italy

Sediment transport in a tidal inlet: the case of the Lido Inlet, Venice, Italy
Sediment transport in a tidal inlet: the case of the Lido Inlet, Venice, Italy
Tidal inlets provide a connection between the ocean and bays, lagoons, marshes, and tidal creek systems. Two hydrodynamic factors are dominant in the long term evolution of a tidal inlet: wind waves, that are mainly responsible for re-suspending sediments, and tidal currents, that maintain the main inlet channel by advecting sediments away from the inlets. These two factors determine to a large extent the direction and magnitude of sediment transport. Tidal inlets, however, are often radically modified by human-driven intervention (for example for navigation or protection purposes). This is the case of the three inlets of the Venice Lagoon, Italy, that are now the main construction site of a mobile barrier system for the protection of the historical city of Venice from floods. In September 2014, an experiment was set up in one of the lagoon inlets aimed to quantify the bedload transport inside the inlet channel over a tidal cycle. To obtain a bedload transport estimate, we carried out repeated bathymetric surveys inside the inlet channel during a tidal cycle using a high resolution Multibeam Echosounder System. The tidal currents and water column transport were measured with ADCP calibrated by water samples. At the same time, sediment traps were deployed at the channel bottom and grab samples were collected. The preliminary results of the experiment show evidence of net transport over a tidal cycle. Comparing repeated bathymetric surveys over different years we find substantial changes in the inlet channel morphology.
Coastal research, Coastal sediments, Sediment transport, Sediment transport measurement, Tidal inlet, Venice Lagoon
Madricardo, Fantina
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Amos, Carl
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De Pascalis, Francesca
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Ferrarin, Christian
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Fogarin, Stefano
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Lorenzetti, Giuliano
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Kassem, Hachem
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Kruss, Aleksandra
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Maicu, Francesco
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Petrizzo, Antonio
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Umgiesser, Georg
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Zaggia, Luca
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Madricardo, Fantina
3edc7f8a-a682-4687-8da8-a40b82887ee2
Amos, Carl
d0a18a13-bccd-4fdc-8901-aea595d4ed5c
De Pascalis, Francesca
19f044e1-5a57-4776-a8f0-be93c9e75429
Ferrarin, Christian
1521f452-00e4-432b-9acc-f6195aee2ab3
Fogarin, Stefano
2d6db0c2-c07d-4898-8c60-c01547d93afb
Lorenzetti, Giuliano
7ed89987-0e64-4ad6-af53-a086955fa598
Kassem, Hachem
658efa7a-a02c-4b29-9d07-5d57e95a4b51
Kruss, Aleksandra
31248bb3-61ab-45c7-ba5a-32d0caa6f8c2
Maicu, Francesco
c1f76ef2-788c-4510-a43b-886c15d03553
Petrizzo, Antonio
c2ae38a3-2416-4b43-9be3-81c062474a5a
Umgiesser, Georg
103345fe-ec36-4a0f-8a27-ade81e739b5a
Zaggia, Luca
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Madricardo, Fantina, Amos, Carl, De Pascalis, Francesca, Ferrarin, Christian, Fogarin, Stefano, Lorenzetti, Giuliano, Kassem, Hachem, Kruss, Aleksandra, Maicu, Francesco, Petrizzo, Antonio, Umgiesser, Georg and Zaggia, Luca (2015) Sediment transport in a tidal inlet: the case of the Lido Inlet, Venice, Italy. Unbounded boundaries and shifting baselines: Estuaries and coastal seas in a rapidly changing world, United Kingdom. 06 - 09 Sep 2015.

Record type: Conference or Workshop Item (Poster)

Abstract

Tidal inlets provide a connection between the ocean and bays, lagoons, marshes, and tidal creek systems. Two hydrodynamic factors are dominant in the long term evolution of a tidal inlet: wind waves, that are mainly responsible for re-suspending sediments, and tidal currents, that maintain the main inlet channel by advecting sediments away from the inlets. These two factors determine to a large extent the direction and magnitude of sediment transport. Tidal inlets, however, are often radically modified by human-driven intervention (for example for navigation or protection purposes). This is the case of the three inlets of the Venice Lagoon, Italy, that are now the main construction site of a mobile barrier system for the protection of the historical city of Venice from floods. In September 2014, an experiment was set up in one of the lagoon inlets aimed to quantify the bedload transport inside the inlet channel over a tidal cycle. To obtain a bedload transport estimate, we carried out repeated bathymetric surveys inside the inlet channel during a tidal cycle using a high resolution Multibeam Echosounder System. The tidal currents and water column transport were measured with ADCP calibrated by water samples. At the same time, sediment traps were deployed at the channel bottom and grab samples were collected. The preliminary results of the experiment show evidence of net transport over a tidal cycle. Comparing repeated bathymetric surveys over different years we find substantial changes in the inlet channel morphology.

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Poster_ecsa2015_Sediment Transport in Lido Inlet, Venice - Version of Record
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More information

Published date: September 2015
Venue - Dates: Unbounded boundaries and shifting baselines: Estuaries and coastal seas in a rapidly changing world, United Kingdom, 2015-09-06 - 2015-09-09
Keywords: Coastal research, Coastal sediments, Sediment transport, Sediment transport measurement, Tidal inlet, Venice Lagoon

Identifiers

Local EPrints ID: 419527
URI: http://eprints.soton.ac.uk/id/eprint/419527
PURE UUID: 986d1530-2247-4164-9c9a-2b176b25cf3a
ORCID for Hachem Kassem: ORCID iD orcid.org/0000-0002-5936-6037

Catalogue record

Date deposited: 13 Apr 2018 16:30
Last modified: 18 Feb 2021 17:22

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Contributors

Author: Fantina Madricardo
Author: Carl Amos
Author: Francesca De Pascalis
Author: Christian Ferrarin
Author: Stefano Fogarin
Author: Giuliano Lorenzetti
Author: Hachem Kassem ORCID iD
Author: Aleksandra Kruss
Author: Francesco Maicu
Author: Antonio Petrizzo
Author: Georg Umgiesser
Author: Luca Zaggia

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