Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management
The need to remove deposited material from water basins is common and has been shared by many ports and channels since the earliest settlements along coasts and rivers. Dredging, the most widely used method to remove sediment deposits, is a reliable and wide-spread technology. Nevertheless, dredging...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/9/2/197 |
| _version_ | 1797396781516980224 |
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| author | Marco Pellegrini Arash Aghakhani Maria Gabriella Gaeta Renata Archetti Alessandro Guzzini Cesare Saccani |
| author_facet | Marco Pellegrini Arash Aghakhani Maria Gabriella Gaeta Renata Archetti Alessandro Guzzini Cesare Saccani |
| author_sort | Marco Pellegrini |
| collection | DOAJ |
| description | The need to remove deposited material from water basins is common and has been shared by many ports and channels since the earliest settlements along coasts and rivers. Dredging, the most widely used method to remove sediment deposits, is a reliable and wide-spread technology. Nevertheless, dredging is only able to restore the desired water depth but without any kind of impact on the causes of sedimentation and so it cannot guarantee navigability over time. Moreover, dredging operations have relevant environmental and economic issues. Therefore, there is a growing market demand for alternatives to sustainable technologies to dredging able to preserve navigability. This paper aims to evaluate the effectiveness of guaranteeing a minimum water depth over time at the port entrance at Marina of Cervia (Italy), wherein the first industrial scale ejector demo plant has been installed and operated from June 2019. The demo plant was designed to continuously remove the sediment that naturally settles in a certain area through the operation of the ejectors, which are submersible jet pumps. This paper focuses on a three-year analysis of bathymetries realized at the port inlet before and after ejector demo plant installation and correlates the bathymetric data with metocean data (waves and sea water level) collected in the same period. In particular, this paper analyses the relation between sea depth and sediment volume variation at the port inlet with ejector demo plant operation regimes. Results show that in the period from January to April 2020, which was also the period of full load operation of the demo plant, the water depth in the area of influence of the ejectors increased by 0.72 mm/day, while in the whole port inlet area a decrease of 0.95 mm/day was observed. Furthermore, in the same period of operation, the ejector demo plant’s impact on volume variation was estimated in a range of 245–750 m<sup>3</sup>. |
| first_indexed | 2024-03-09T00:56:29Z |
| format | Article |
| id | doaj.art-54aee6e0612e4ede8d3d780bbf3412b9 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T00:56:29Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-54aee6e0612e4ede8d3d780bbf3412b92023-12-11T16:53:05ZengMDPI AGJournal of Marine Science and Engineering2077-13122021-02-019219710.3390/jmse9020197Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment ManagementMarco Pellegrini0Arash Aghakhani1Maria Gabriella Gaeta2Renata Archetti3Alessandro Guzzini4Cesare Saccani5Department of Industrial Engineering, University of Bologna, 40136 Bologna, ItalyDepartment of Industrial Engineering, University of Bologna, 40136 Bologna, ItalyInterdepartmental Centre for Industrial Research in Building and Construction, 40131 Bologna, ItalyInterdepartmental Centre for Industrial Research in Building and Construction, 40131 Bologna, ItalyInterdepartmental Centre for Industrial Research in Building and Construction, 40131 Bologna, ItalyDepartment of Industrial Engineering, University of Bologna, 40136 Bologna, ItalyThe need to remove deposited material from water basins is common and has been shared by many ports and channels since the earliest settlements along coasts and rivers. Dredging, the most widely used method to remove sediment deposits, is a reliable and wide-spread technology. Nevertheless, dredging is only able to restore the desired water depth but without any kind of impact on the causes of sedimentation and so it cannot guarantee navigability over time. Moreover, dredging operations have relevant environmental and economic issues. Therefore, there is a growing market demand for alternatives to sustainable technologies to dredging able to preserve navigability. This paper aims to evaluate the effectiveness of guaranteeing a minimum water depth over time at the port entrance at Marina of Cervia (Italy), wherein the first industrial scale ejector demo plant has been installed and operated from June 2019. The demo plant was designed to continuously remove the sediment that naturally settles in a certain area through the operation of the ejectors, which are submersible jet pumps. This paper focuses on a three-year analysis of bathymetries realized at the port inlet before and after ejector demo plant installation and correlates the bathymetric data with metocean data (waves and sea water level) collected in the same period. In particular, this paper analyses the relation between sea depth and sediment volume variation at the port inlet with ejector demo plant operation regimes. Results show that in the period from January to April 2020, which was also the period of full load operation of the demo plant, the water depth in the area of influence of the ejectors increased by 0.72 mm/day, while in the whole port inlet area a decrease of 0.95 mm/day was observed. Furthermore, in the same period of operation, the ejector demo plant’s impact on volume variation was estimated in a range of 245–750 m<sup>3</sup>.https://www.mdpi.com/2077-1312/9/2/197ejectorssediment transport rateport sediment managementeffectiveness assessment |
| spellingShingle | Marco Pellegrini Arash Aghakhani Maria Gabriella Gaeta Renata Archetti Alessandro Guzzini Cesare Saccani Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management Journal of Marine Science and Engineering ejectors sediment transport rate port sediment management effectiveness assessment |
| title | Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management |
| title_full | Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management |
| title_fullStr | Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management |
| title_full_unstemmed | Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management |
| title_short | Effectiveness Assessment of an Innovative Ejector Plant for Port Sediment Management |
| title_sort | effectiveness assessment of an innovative ejector plant for port sediment management |
| topic | ejectors sediment transport rate port sediment management effectiveness assessment |
| url | https://www.mdpi.com/2077-1312/9/2/197 |
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