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\n\n \n \n \n \n \n \n Characterisation of the Bahia Blanca estuary by data analysis and numerical modelling.\n \n \n \n \n\n\n \n Campuzano, F., J.; Pierini, J., O.; Leitão, P., C.; Gómez, E., A.; and Neves, R., J.\n\n\n \n\n\n\n
Journal of Marine Systems, 129: 415-424. 2014.\n
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@article{\n title = {Characterisation of the Bahia Blanca estuary by data analysis and numerical modelling},\n type = {article},\n year = {2014},\n keywords = {Bahia Blanca estuary,Hydrodynamic model,MOHID numerical model},\n pages = {415-424},\n volume = {129},\n websites = {http://dx.doi.org/10.1016/j.jmarsys.2013.09.001},\n publisher = {Elsevier B.V.},\n id = {feb78378-ea0d-3c86-838b-1a6b982a430e},\n created = {2022-10-13T15:48:46.248Z},\n file_attached = {false},\n profile_id = {7be7f7a6-afaf-3ffc-92cf-b3439435407e},\n group_id = {18d455af-4919-32bc-bcfa-03673c5649ef},\n last_modified = {2022-10-13T15:48:46.248Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {The Bahia Blanca estuary is a complex system of channels and tidal flats where the most important deep water harbour system of Argentina is located. The main goal of the present work was to obtain a hydrodynamic conceptual model for the Bah??a Blanca coastal area. For this reason, a combined analysis of observed data and numerical modelling has been performed for the whole area. The gained knowledge on the system hydrodynamics could aid in the decision support for navigation security, waste water discharges management, sediment dredging and rejection operations among other applications.Due to the Bah??a Blanca coastal vast area, hydrodynamic observations are scarce and located near the populated areas. In order to describe the hydrodynamics of such a complex and large system, the analysed tidal and current data from different periods have been completed through numerical modelling.Data analysis served to determine the main processes governing the Bah??a Blanca hydrodynamics, to characterise the area using general descriptors, to provide inputs for the numerical model and to aid in evaluating its performance. In addition, a 2-dimensional application was set up using the MOHID water modelling system for the Bah??a Blanca estuary. This application aimed to gain a better understanding of the system dynamics, to explain and test the consistency of the observed data and to reproduce the processes taking place.Model results were in good agreement with the analysed data and served to confirm an inconsistency found on the sea level observations. The combination of both methodologies served to further describe the hydrodynamic processes governing this coastal area and also to obtain a conceptual model for the water and property circulation in the Bah??a Blanca estuary. ?? 2013 Elsevier B.V.},\n bibtype = {article},\n author = {Campuzano, Francisco Javier and Pierini, Jorge O. and Leitão, Paulo C. and Gómez, Eduardo A. and Neves, Ramiro J.},\n doi = {10.1016/j.jmarsys.2013.09.001},\n journal = {Journal of Marine Systems}\n}
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\n The Bahia Blanca estuary is a complex system of channels and tidal flats where the most important deep water harbour system of Argentina is located. The main goal of the present work was to obtain a hydrodynamic conceptual model for the Bah??a Blanca coastal area. For this reason, a combined analysis of observed data and numerical modelling has been performed for the whole area. The gained knowledge on the system hydrodynamics could aid in the decision support for navigation security, waste water discharges management, sediment dredging and rejection operations among other applications.Due to the Bah??a Blanca coastal vast area, hydrodynamic observations are scarce and located near the populated areas. In order to describe the hydrodynamics of such a complex and large system, the analysed tidal and current data from different periods have been completed through numerical modelling.Data analysis served to determine the main processes governing the Bah??a Blanca hydrodynamics, to characterise the area using general descriptors, to provide inputs for the numerical model and to aid in evaluating its performance. In addition, a 2-dimensional application was set up using the MOHID water modelling system for the Bah??a Blanca estuary. This application aimed to gain a better understanding of the system dynamics, to explain and test the consistency of the observed data and to reproduce the processes taking place.Model results were in good agreement with the analysed data and served to confirm an inconsistency found on the sea level observations. The combination of both methodologies served to further describe the hydrodynamic processes governing this coastal area and also to obtain a conceptual model for the water and property circulation in the Bah??a Blanca estuary. ?? 2013 Elsevier B.V.\n
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\n\n \n \n \n \n \n Trophic state evaluation after urban loads diversion in a eutrophic coastal lagoon (Óbidos Lagoon, Portugal): A modeling approach.\n \n \n \n\n\n \n Malhadas, M., S.; Mateus, M., D.; Brito, D.; and Neves, R.\n\n\n \n\n\n\n
Hydrobiologia, 740(1): 231-251. 2014.\n
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@article{\n title = {Trophic state evaluation after urban loads diversion in a eutrophic coastal lagoon (Óbidos Lagoon, Portugal): A modeling approach},\n type = {article},\n year = {2014},\n keywords = {Hydro-ecological modeling,Pig farms,Trophic state,Urban loads,Water Framework Directive,Óbidos Lagoon},\n pages = {231-251},\n volume = {740},\n id = {6d228c91-c818-3407-a743-b81f97d5df2f},\n created = {2022-10-13T15:48:46.454Z},\n file_attached = {false},\n profile_id = {7be7f7a6-afaf-3ffc-92cf-b3439435407e},\n group_id = {18d455af-4919-32bc-bcfa-03673c5649ef},\n last_modified = {2022-10-13T15:48:46.454Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Óbidos Lagoon is classified as a sensible system according to the eutrophication criteria in the Portuguese Decree-Law 149/2004, which transpose the standards of Urban Waste Water Treatment Directive (Council Directive 91/271/EEC) concerning urban waste water treatment. From September 2005 onwards, the urban loads of five Waste Water Treatment Plant (WWTP) were deviated to a submarine outfall to prevent water degradation and improve the lagoon trophic state (LTS). This paper evaluated the LTS after urban loads diversion, testing the hypothesis behind the management decision. First, the loads reaching the lagoon were determined with the Harp-Nut guidelines and watershed modeling. Then, the water quality in the lagoon was simulated with a hydro-ecological model and compared with measured data. Finally, management scenarios corresponding to nutrient loads reduction were tested to determine hypothesis-driven LTS. Results showed that the loads from pig farms should be diverted instead of the WWTP, to improve the LTS and achieve a 'Good/Bad' status. The proposed method stresses the importance of integrated modeling tools in the Water Framework Directive, given their skill in testing various hypothesis, and ultimately ruling out inadequate management decisions before implementation. [ABSTRACT FROM AUTHOR]},\n bibtype = {article},\n author = {Malhadas, Madalena S. and Mateus, M. D. and Brito, D. and Neves, R.},\n doi = {10.1007/s10750-014-1956-8},\n journal = {Hydrobiologia},\n number = {1}\n}
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\n Óbidos Lagoon is classified as a sensible system according to the eutrophication criteria in the Portuguese Decree-Law 149/2004, which transpose the standards of Urban Waste Water Treatment Directive (Council Directive 91/271/EEC) concerning urban waste water treatment. From September 2005 onwards, the urban loads of five Waste Water Treatment Plant (WWTP) were deviated to a submarine outfall to prevent water degradation and improve the lagoon trophic state (LTS). This paper evaluated the LTS after urban loads diversion, testing the hypothesis behind the management decision. First, the loads reaching the lagoon were determined with the Harp-Nut guidelines and watershed modeling. Then, the water quality in the lagoon was simulated with a hydro-ecological model and compared with measured data. Finally, management scenarios corresponding to nutrient loads reduction were tested to determine hypothesis-driven LTS. Results showed that the loads from pig farms should be diverted instead of the WWTP, to improve the LTS and achieve a 'Good/Bad' status. The proposed method stresses the importance of integrated modeling tools in the Water Framework Directive, given their skill in testing various hypothesis, and ultimately ruling out inadequate management decisions before implementation. [ABSTRACT FROM AUTHOR]\n
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\n\n \n \n \n \n \n \n Three-dimensional oil spill transport and dispersion at sea by an event of blowout.\n \n \n \n \n\n\n \n Otero-Diaz, L.; Pierini, J., O.; Chambel-Leitao, P.; Malhadas, M.; Ribeiro, J.; Chambel-Leitao, J.; and Restrepo, J.\n\n\n \n\n\n\n
Dyna, 81(186): 42-50. 2014.\n
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@article{\n title = {Three-dimensional oil spill transport and dispersion at sea by an event of blowout},\n type = {article},\n year = {2014},\n keywords = {Blowout,hydrodynamic,oil spill,spread},\n pages = {42-50},\n volume = {81},\n websites = {http://dyna.medellin.unal.edu.co/en/verResumenEN.php?id_articulo=v81n186a05},\n id = {f95e225b-0997-3c49-b564-cc68898c988d},\n created = {2022-10-13T15:48:46.702Z},\n file_attached = {true},\n profile_id = {7be7f7a6-afaf-3ffc-92cf-b3439435407e},\n group_id = {18d455af-4919-32bc-bcfa-03673c5649ef},\n last_modified = {2022-10-13T15:49:00.154Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {The simulated droplet trajectories of the 3-D model at the Caribbean platform showed that droplets with a diameter of 50mmformed a distinct subsurface plume, which was transported horizontally and could remain below the surface. This plume could have a very restricted area of impact because the dispersion is only controlled by the ocean currents which, at 1000 m depth, have a low intensity and are quite turbulent. In this case, the formed plume stayed trapped at 1000 m depth, not posing a risk to the Caribbean Coast. In contrast, droplets with diameters of 250mm, 1 and 10mm rose rapidly to the surface, even with different velocities (6, 10, 20 ms-1).},\n bibtype = {article},\n author = {Otero-Diaz, Luis and Pierini, Jorge O. and Chambel-Leitao, Paulo and Malhadas, Madalena and Ribeiro, Joao and Chambel-Leitao, Jose and Restrepo, Juan},\n doi = {10.15446/dyna.v81n186.37951},\n journal = {Dyna},\n number = {186}\n}
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\n The simulated droplet trajectories of the 3-D model at the Caribbean platform showed that droplets with a diameter of 50mmformed a distinct subsurface plume, which was transported horizontally and could remain below the surface. This plume could have a very restricted area of impact because the dispersion is only controlled by the ocean currents which, at 1000 m depth, have a low intensity and are quite turbulent. In this case, the formed plume stayed trapped at 1000 m depth, not posing a risk to the Caribbean Coast. In contrast, droplets with diameters of 250mm, 1 and 10mm rose rapidly to the surface, even with different velocities (6, 10, 20 ms-1).\n
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\n\n \n \n \n \n \n \n Evaluating the predictive skills of ocean circulation models in tracking the drift of a human body: a case study.\n \n \n \n \n\n\n \n Mateus, M.; Pinto, L.; and Chambel-Leitão, P.\n\n\n \n\n\n\n
Australian Journal of Forensic Sciences, 0618(July): 1-10. 2014.\n
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@article{\n title = {Evaluating the predictive skills of ocean circulation models in tracking the drift of a human body: a case study},\n type = {article},\n year = {2014},\n keywords = {accumulated degree days,body drift,computer simulations,drowning,forensic oceanography,post-mortem submersion interval},\n pages = {1-10},\n volume = {0618},\n websites = {http://www.tandfonline.com/doi/abs/10.1080/00450618.2014.957346},\n id = {858907e1-5af1-3b1c-b813-ac25ac119ef6},\n created = {2022-10-13T15:48:46.900Z},\n file_attached = {false},\n profile_id = {7be7f7a6-afaf-3ffc-92cf-b3439435407e},\n group_id = {18d455af-4919-32bc-bcfa-03673c5649ef},\n last_modified = {2022-10-13T15:48:46.900Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Ocean circulation models are frequently used in maritime Search and Rescue operations due to their skill in simulating the effects of local currents on the transport of people or objects. They are also occasionally used in forensic contexts. Frequently, positively or neutrally buoyant passive particles are used in these simulations, as a proxy for the ‘objects’ in the study. In this paper, the adequacy of passive particle model simulations is tested in an attempt to reproduce the drift of a real case situation. The case study consists of a drowning accident in which the drift was ~2 km for a post-mortem submersion interval (PMSI) of 8.6 days. The simula- tion results highlighted the limitation of the methodology to predict the correct drift. However, we discuss the shortcomings of the modelling approach, and suggest ways to improve the skill of such numerical tools in predicting body drift after drowning accidents.},\n bibtype = {article},\n author = {Mateus, Marcos and Pinto, Ligia and Chambel-Leitão, Paulo},\n doi = {10.1080/00450618.2014.957346},\n journal = {Australian Journal of Forensic Sciences},\n number = {July}\n}
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\n Ocean circulation models are frequently used in maritime Search and Rescue operations due to their skill in simulating the effects of local currents on the transport of people or objects. They are also occasionally used in forensic contexts. Frequently, positively or neutrally buoyant passive particles are used in these simulations, as a proxy for the ‘objects’ in the study. In this paper, the adequacy of passive particle model simulations is tested in an attempt to reproduce the drift of a real case situation. The case study consists of a drowning accident in which the drift was ~2 km for a post-mortem submersion interval (PMSI) of 8.6 days. The simula- tion results highlighted the limitation of the methodology to predict the correct drift. However, we discuss the shortcomings of the modelling approach, and suggest ways to improve the skill of such numerical tools in predicting body drift after drowning accidents.\n
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\n\n \n \n \n \n \n Modelling of cohesive sediment dynamics in tidal estuarine systems: Case study of Tagus estuary, Portugal.\n \n \n \n\n\n \n Franz, G.; Pinto, L.; Ascione, I.; Mateus, M.; Fernandes, R.; Leitão, P.; and Neves, R.\n\n\n \n\n\n\n
Estuarine, Coastal and Shelf Science, 151: 34-44. 2014.\n
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@article{\n title = {Modelling of cohesive sediment dynamics in tidal estuarine systems: Case study of Tagus estuary, Portugal},\n type = {article},\n year = {2014},\n keywords = {Cohesive sediments,Estuarine dynamics,Hydrodynamics,Modelling,Portugal,Tagus estuary},\n pages = {34-44},\n volume = {151},\n id = {3e05c5e3-9f9e-31fa-8a5b-20400653add9},\n created = {2022-10-13T15:48:47.198Z},\n file_attached = {false},\n profile_id = {7be7f7a6-afaf-3ffc-92cf-b3439435407e},\n group_id = {18d455af-4919-32bc-bcfa-03673c5649ef},\n last_modified = {2022-10-13T15:48:47.198Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {Cohesive sediment dynamics in estuarine systems is a major issue in water quality and engineering problems. Numerical models can help to assess the complex dynamics of cohesive sediments, integrating the information collected in monitoring studies. Following a numerical approach we investigated the main factors that influence the cohesive sediment dynamics in an estuarine system composed of large mudflats (Tagus estuary, Portugal). After a spin up period of the bottom layer and considering the combined effect of waves and currents on the bottom shear stress, the dynamics of cohesive sediment during the fortnightly and daily erosion-sedimentation cycle was properly reproduced by the model. The results of cohesive suspended sediments were validated with data from sixteen monitoring stations located along the estuary and turbidity data measured by two multiparametric probes. The hydrodynamics were previously validated by harmonic analysis and with ADCP data. Although tidal currents are the major cause of cohesive sediment erosion, the results suggest that wind waves also play an important role. The simulated sediment mass involved in the fortnightly tidal cycle was in the same order of magnitude of the annual load from the rivers, as observed in previous studies based on field data.},\n bibtype = {article},\n author = {Franz, G. and Pinto, L. and Ascione, I. and Mateus, M. and Fernandes, R. and Leitão, P. and Neves, R.},\n doi = {10.1016/j.ecss.2014.09.017},\n journal = {Estuarine, Coastal and Shelf Science}\n}
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\n Cohesive sediment dynamics in estuarine systems is a major issue in water quality and engineering problems. Numerical models can help to assess the complex dynamics of cohesive sediments, integrating the information collected in monitoring studies. Following a numerical approach we investigated the main factors that influence the cohesive sediment dynamics in an estuarine system composed of large mudflats (Tagus estuary, Portugal). After a spin up period of the bottom layer and considering the combined effect of waves and currents on the bottom shear stress, the dynamics of cohesive sediment during the fortnightly and daily erosion-sedimentation cycle was properly reproduced by the model. The results of cohesive suspended sediments were validated with data from sixteen monitoring stations located along the estuary and turbidity data measured by two multiparametric probes. The hydrodynamics were previously validated by harmonic analysis and with ADCP data. Although tidal currents are the major cause of cohesive sediment erosion, the results suggest that wind waves also play an important role. The simulated sediment mass involved in the fortnightly tidal cycle was in the same order of magnitude of the annual load from the rivers, as observed in previous studies based on field data.\n
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\n\n \n \n \n \n \n \n MOHID parallelization upgrade following a domain decomposition approach.\n \n \n \n \n\n\n \n Leitão, P.\n\n\n \n\n\n\n Technical Report Hidromod, 2014.\n
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@techreport{\n title = {MOHID parallelization upgrade following a domain decomposition approach},\n type = {techreport},\n year = {2014},\n keywords = {MOHID,MPI,domain decomposition,parallelization},\n institution = {Hidromod},\n id = {eb2acf56-48e8-335f-850d-d866cb32988e},\n created = {2022-10-13T15:48:47.463Z},\n file_attached = {true},\n profile_id = {7be7f7a6-afaf-3ffc-92cf-b3439435407e},\n group_id = {18d455af-4919-32bc-bcfa-03673c5649ef},\n last_modified = {2022-10-13T15:49:00.295Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {? Introduction In this document the MOHID parallelization upgrade done by Hidromod in the framework of the EnergyMare project is described. The work was sub-contracted by MeteoGalicia, one of EnergyMare partners. This upgrade had a global objective of increasing the speedup factor associated with MOHID modelling system's parallelization. A specific goal was to increase the computational efficiency of the operational MOHID hydrodynamic model used by MeteoGalicia. This upgrade will allow running larger model domains with the same horizontal discretization. This way MeteoGalicia could merge the 4 operational MOHID models run for each Ria in a single model covering the entire Rias maintaining the horizontal and vertical discretization. This methodology will allow simulating Rias interaction. Additionally, with this new upgrade MeteoGalicia will be able to run higher resolution models and consequently enhance its capability to accurately identify areas with high potential to generate marine current energy and fulfil one of the EnergyMare goals. Currently MOHID has two main parallelization approaches implemented: (1) one where each MOHID model/sub-model runs in a different process and the communication between processes is done using MPI; (2) In the other approach each “do loop” is parallelized using OpenMP directives; MPI allocates processes and OpenMP allocates threads. Along this document “process”, “thread” and “core” concepts will be used. The first two are used when the discussion is focused in the software (MPI – processes, OpenMP - threads) and third one (core) in the hardware (e.g. speedup quantification).},\n bibtype = {techreport},\n author = {Leitão, Paulo}\n}
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\n ? Introduction In this document the MOHID parallelization upgrade done by Hidromod in the framework of the EnergyMare project is described. The work was sub-contracted by MeteoGalicia, one of EnergyMare partners. This upgrade had a global objective of increasing the speedup factor associated with MOHID modelling system's parallelization. A specific goal was to increase the computational efficiency of the operational MOHID hydrodynamic model used by MeteoGalicia. This upgrade will allow running larger model domains with the same horizontal discretization. This way MeteoGalicia could merge the 4 operational MOHID models run for each Ria in a single model covering the entire Rias maintaining the horizontal and vertical discretization. This methodology will allow simulating Rias interaction. Additionally, with this new upgrade MeteoGalicia will be able to run higher resolution models and consequently enhance its capability to accurately identify areas with high potential to generate marine current energy and fulfil one of the EnergyMare goals. Currently MOHID has two main parallelization approaches implemented: (1) one where each MOHID model/sub-model runs in a different process and the communication between processes is done using MPI; (2) In the other approach each “do loop” is parallelized using OpenMP directives; MPI allocates processes and OpenMP allocates threads. Along this document “process”, “thread” and “core” concepts will be used. The first two are used when the discussion is focused in the software (MPI – processes, OpenMP - threads) and third one (core) in the hardware (e.g. speedup quantification).\n
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\n\n \n \n \n \n \n \n MOHID implementation in parallel mode following a domain decomposition approach to the Rias Baixas area.\n \n \n \n \n\n\n \n Leitão, P.\n\n\n \n\n\n\n Technical Report Hidromod, 2014.\n
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@techreport{\n title = {MOHID implementation in parallel mode following a domain decomposition approach to the Rias Baixas area},\n type = {techreport},\n year = {2014},\n keywords = {MOHID,MPI,Rias Baixas,domain decomposition,parallelization},\n institution = {Hidromod},\n id = {ba91ff5d-343a-3e1c-8cd0-03129a9e67c3},\n created = {2022-10-13T15:48:47.664Z},\n file_attached = {true},\n profile_id = {7be7f7a6-afaf-3ffc-92cf-b3439435407e},\n group_id = {18d455af-4919-32bc-bcfa-03673c5649ef},\n last_modified = {2022-10-13T15:49:00.420Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n abstract = {In this document the implementation of MOHID in parallel mode to the Rias Baixas area by Hidromod in the framework of the RaiaCO project is described. The work was sub-contracted by MeteoGalicia, one of RaiaCO partners. This MOHID Rias Baixas implementation main objective was to simulate 3 days of 3D circulation for the entire Rias Baixas area with a spatial resolution of ~300 m in ~2h30 m. Additionally scalability tests of MOHID run in parallel mode for a schematic case were done. The goal was to test the behaviour of MOHID run in baroclinic mode in a grid with 80 million computation cells (20.000x400x10) run in parallel using 384 cores (or threads). MOHID},\n bibtype = {techreport},\n author = {Leitão, Paulo}\n}
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\n In this document the implementation of MOHID in parallel mode to the Rias Baixas area by Hidromod in the framework of the RaiaCO project is described. The work was sub-contracted by MeteoGalicia, one of RaiaCO partners. This MOHID Rias Baixas implementation main objective was to simulate 3 days of 3D circulation for the entire Rias Baixas area with a spatial resolution of ~300 m in ~2h30 m. Additionally scalability tests of MOHID run in parallel mode for a schematic case were done. The goal was to test the behaviour of MOHID run in baroclinic mode in a grid with 80 million computation cells (20.000x400x10) run in parallel using 384 cores (or threads). MOHID\n
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\n\n \n \n \n \n \n \n Influence of MeteOcean processes on MSYM sea level predictions in the Singapore and Malacca Straits.\n \n \n \n \n\n\n \n Bartolomeu S, Malhadas M, Leitão P, D., J.\n\n\n \n\n\n\n
3.as Jornadas de Engenharia Hidrográfica, 24-26 June 2014, Lisbon, Portugal. Extended abstracts: ,155-158. . 2014.\n
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@article{\n title = {Influence of MeteOcean processes on MSYM sea level predictions in the Singapore and Malacca Straits.},\n type = {article},\n year = {2014},\n pages = {155-158. },\n id = {50b2a351-6552-3063-a95f-d4fd5dffeb82},\n created = {2022-10-13T15:48:47.862Z},\n file_attached = {true},\n profile_id = {7be7f7a6-afaf-3ffc-92cf-b3439435407e},\n group_id = {18d455af-4919-32bc-bcfa-03673c5649ef},\n last_modified = {2022-10-13T15:49:00.552Z},\n read = {false},\n starred = {false},\n authored = {false},\n confirmed = {true},\n hidden = {false},\n private_publication = {false},\n bibtype = {article},\n author = {Bartolomeu S, Malhadas M, Leitão P, Dias J.},\n journal = {3.as Jornadas de Engenharia Hidrográfica, 24-26 June 2014, Lisbon, Portugal. Extended abstracts: }\n}
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