Grifoll Colls, Manel
Total activity: 101
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LIM/UPC - Maritime Engineering Laboratory
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manel.grifollupc.edu
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1 to 50 of 101 results
  • Numerical simulation of water mixing and renewals in the Barcelona harbour area: the winter season

     Galea, Anthony; Grifoll Colls, Manel; Roman, Federico; Mestres Ridge, Marc; Armenio, Vincenzo; Sanchez-arcilla Conejo, Agustin; Zammit Mangion, Louis
    Environmental fluid mechanics
    Vol. 14, num. 6, p. 1405-1425
    DOI: 10.1007/s10652-014-9351-6
    Date of publication: 2014-12
    Journal article

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    In the present paper, we use numerical simulation to investigate currents, mixing and water renewal in Barcelona harbour under typical conditions of wind forcing for the winter season. This site is of particular importance due to the interplay between touristic and commercial activities, requiring detailed and high-definition studies of water quality within the harbour. We use Large Eddy Simulation (LES) which directly resolves the anisotropic and energetic large scales of motion and parametrizes the small, dissipative, ones. Small-scale turbulence is modelled by the anisotropic Smagorinsky model (ASM) to be employed in presence of large cell anisotropy. The complexity of the harbour is modelled using a combination of curvilinear, structured, non-staggered grid and the immersed boundary method. Boundary conditions for wind and currents at the inlets of the port are obtained from in-situ measurements. Analysis of the numerical results is carried out based on both instantaneous and time-averaged velocity fields. First- and second-order statistics, such as turbulent kinetic energy and horizontal and vertical eddy viscosities, are calculated and their spatial distribution is discussed. The study shows the presence of intense current in the narrow and elongated part of the harbour together with sub-surface along-shore elongated rolling structures (with a time scale of a few hours), and they contribute to the vertical water mixing. Time-averaged velocity field reveals intense upwelling and downwelling zones along the walls of the harbour. The analysis of second-order statistics shows strong inhomogeneity of turbulent kinetic; [GRAPHICS]; .; energy and horizontal and vertical eddy viscosities in the horizontal plane, with larger values in the regions characterized by stronger currents. The water renewal within the port is quantified for particular sub-domain regions, showing that the complexity of the harbour is such that certain in-harbour basins have a water renewal of over five days, including the yacht marina area. The LES solution compares favourably with available current-meter data. The LES solution is also compared with a RANS solution obtained in literature for the same site under the same forcing conditions, the comparison demonstrating a large sensitivity of properties to model resolution and frictional parametrization.

  • River plume dispersion in response to flash flood events: application to the Catalan shelf

     Liste, Maria; Grifoll Colls, Manel; Monbaliu, Jaak
    Continental shelf research
    Vol. 87, p. 96-108
    DOI: 10.1016/j.csr.2014.06.007
    Date of publication: 2014-09
    Journal article

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    The dispersal of freshwater inflow from a flood event is studied using a three dimensional flow model (ROMS). The model domain includes a small part of the Catalan shelf where the combination of local land topography with torrential rainfall can cause high local runoff during a short period but with a large impact on the receiving coastal waters. Both steady, low river discharge, typical of normal (lowdischarge) conditions and a high discharge representative of post-rain conditions are considered. Simulated salinity profiles on the shelf near the river mouth are compared with records from CTD measurements with quite good correspondence. A strong correlation between local wind and plume response was observed. Local winds affect the trajectory of the freshwater plume that enters the Catalan shelf waters. During post-rain conditions, northerly and westerly winds exported the plume further away from the coast, whereas southerly and easterly winds confine the plume closer to the coast. During low discharge conditions, the plume remained closer to the coast due to the weak wind stresses. Results show that freshwater spread, shape and dilution are mainly controlled by local wind forcing at relatively short time scales.

  • Formation of fine sediment deposit from a flash flood river in the Mediterranean Sea

     Grifoll Colls, Manel; Gracia Garcia, Vicente; Aretxabaleta, A.; Guillén Aranda, Jorge; Espino Infantes, Manel; Warner, John
    Journal of geophysical research
    Vol. 119, num. 9, p. 5837-5853
    DOI: 10.1002/2014JC010187
    Date of publication: 2014-09
    Journal article

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    We identify the mechanisms controlling fine deposits on the inner-shelf in front of the Besòs River, in the northwestern Mediterranean Sea. This river is characterized by a flash flood regime discharging large amounts of water (more than 20 times the mean water discharge) and sediment in very short periods lasting from hours to few days. Numerical model output was compared with bottom sediment observations and used to characterize the multiple spatial and temporal scales involved in offshore sediment deposit formation. A high-resolution (50 m grid size) coupled hydrodynamic-wave-sediment transport model was applied to the initial stages of the sediment dispersal after a storm-related flood event. After the flood, sediment accumulation was predominantly confined to an area near the coastline as a result of preferential deposition during the final stage of the storm. Subsequent reworking occurred due to wave-induced bottom shear stress that resuspended fine materials, with seaward flow exporting them toward the midshelf. Wave characteristics, sediment availability, and shelf circulation determined the transport after the reworking and the final sediment deposition location. One year simulations of the regional area revealed a prevalent southwestward average flow with increased intensity downstream. The circulation pattern was consistent with the observed fine deposit depocenter being shifted southward from the river mouth. At the southern edge, bathymetry controlled the fine deposition by inducing near-bottom flow convergence enhancing bottom shear stress. According to the short-term and long-term analyses, a seasonal pattern in the fine deposit formation is expected.

  • Surface water renewal and mixing mechanisms in a semi-enclosed microtidal domain. The Barcelona harbour case

     Grifoll Colls, Manel; Jordà Sánchez, Gabriel; Espino Infantes, Manel
    Journal of sea research
    Vol. 90, p. 54-63
    DOI: 10.1016/j.seares.2014.02.007
    Date of publication: 2014-07-01
    Journal article

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    Water renewal and mixing are highly related to the evolution of the ecological status in harbour areas and are crucial for environmental harbour management. For the first time, these processes have been studied in the Barcelona harbour with a high resolution 3D hydrodynamic model. This harbour is representative of a semi-enclosed domain with a complex coastline in a micro-tidal environment (like most Mediterranean harbours). The tracking of numerical Lagrangian particles deployed in the flow was used to parameterize the surface water renewal mechanisms. The use of Finite Size Lyapunov Exponents has proven to be a relatively easy and efficient way to characterize the mixing patterns. The complex geometry of the harbour and the meteo-oceanographic forcings lead to intricate hydrodynamics that define spatial heterogeneity of water renewal and mixing. The most favourable conditions for enhancing surface water renewal and mixing have been identified in idealized scenarios and realistic simulations. In general, renewal is enhanced near the harbour mouths and strongly limited in the inner areas. However, under particular forcing conditions, the residence time can decrease even in the most sheltered areas. The presence of two mouths in the harbour seems to favour water renewal in comparison to harbours with only one mouth. Mixing is mainly induced by the action of wind forcing, while external shelf currents are much less efficient. The study of two realistic simulations suggests that harbour response to real forcing cannot be deduced from the combination of simple idealized scenarios. The time evolution of the forcings and the transient response of the system play a key role in defining the residence time patterns. (C) 2014 Elsevier By. All rights reserved.

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    Sediment transport and dispersal in the nearshore of “flash-flood” rivers  Open access

     Grifoll Colls, Manel; Gracia Garcia, Vicente; Guillén Aranda, Jorge; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin
    International Conference on Coastal Engineering
    p. 1-5
    DOI: 10.9753/icce.v34.sediment.51
    Presentation's date: 2014-06-17
    Presentation of work at congresses

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    River sediment dispersal on the near-shore of “flash-flood” rivers is investigated using a coupled wave-current-sediment transport model. Besòs and Llobregat rivers (short and mountainous rivers in NW Mediterranean Sea, near to Barcelona City) are used as examples to study the sediment transport under “flash-flood” regime. The modeling system COWAST which includes the coupling between the water circulation model ROMS and the wave model SWAN, is applied to assess the sediment dispersal mechanisms and deposition in the coastal area off the two river mouths. Preferential depositional areas such as mud-belts were identified from the simulations. The sediment dispersal pattern obtained by the model agrees with observational measurments. Complementary numerical simulations revealed sorting of sediment grain size in the cross-shelf direction.

  • Dispersal and transport of river sediment on the Catalan Shelf (NW Mediterranean Sea)

     Grifoll Colls, Manel; Gracia Garcia, Vicente; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin
    European Geosciences Union General Assembly
    Presentation's date: 2014-05-02
    Presentation of work at congresses

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  • Water circulation observations in the shelf under severe cross-shelf winds. The case of Sant Jordi Bay (NW Mediterranean Sea)

     Espino Infantes, Manel; Grifoll Colls, Manel; Sanchez-arcilla Conejo, Agustin
    European Geosciences Union General Assembly
    Presentation's date: 2014-05-01
    Presentation of work at congresses

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  • Tidal transformation and resonance in a short, microtidal Mediterranean estuary (Alfacs Bay in Ebre delta)

     Cerralbo Peñarroya, Pablo; Grifoll Colls, Manel; Valle Levinson, Arnoldo; Espino Infantes, Manel
    Estuarine coastal and shelf science
    Vol. 145, p. 57-145
    DOI: 10.1016/j.ecss.2014.04.020
    Date of publication: 2014-05
    Journal article

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    Tidal and subtidal waves are analyzed with sea-level data and numerical modeling in a short and micro-tidal embayment, Alfacs Bay (NW Mediterranean Sea). Data analysis exhibits tidal wave amplification and seiching (characteristic period of 3.5h) along the bay. Numerical results show an eight-fold increase in quarter-wave resonant wave amplitudes from the mouth to the head of the bay. This amplification follows the classical description of a standing wave. Moreover, resonant wave velocities measured and computed at the bay mouth (node location) are about one order of magnitude higher than tidal currents. Analysis of astronomic tidal propagation in the bay reveals similar behavior for diurnal and semidiurnal constituents. Tidal waves amplify along the bay by 3% for diurnal and 10% for semidiurnal constituents. Numerical simulations conducted with different domains indicate that geometric effects dominate over frictional influences in causing the wave behavior. This behavior is consistent with the existence of a quasi-steady standing wave within the bay.

  • Laboratori d'enginyeria marítima

     Grifoll Colls, Manel; Garcia Leon, Manuel; Casas Prat, Merce; Cerralbo Peñarroya, Pablo; Ballesteros Martinez, Caridad; Leaño Chlebricek, Monica V; Marzeddu, Andrea; Pallares Lopez, Elena; Bosom Garcia, Eva; González Marco, Daniel; Sierra Pedrico, Juan Pablo; Jimenez Quintana, Jose Antonio; Gracia Garcia, Vicente; Mösso Aranda, Octavio Cesar; Espino Infantes, Manel; Gomez Aguar, Jesus Javier; Mestres Ridge, Marc; Valdemoro Garcia, Herminia; Sospedra Iglesias, Joaquin; Gironella i Cobos, Framcesc Xavier; Caceres Rabionet, Ivan; Torres Lahuerta, Richard Manuel; Puigdefabregas Sagrista, Juan; Galego Garcia, Oscar; Cateura Sabri, Jordi; Mujal Colilles, Anna; Sole, Francesco; Cunha Monteiro Brenardi, Marcela; Sanuy Vazquez, Marc; Sanchez-arcilla Conejo, Agustin
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  • Environmental design of a quay using water renewal

     Grifoll Colls, Manel; Sierra Pedrico, Juan Pablo; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin
    Journal of marine and environmental engineering
    Vol. 9, num. 4, p. 331-349
    Date of publication: 2014
    Journal article

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    This contribution describes a case study in which water renewal is considered in the project design for a new quay in Bilbao harbour (Bay of Biscay, NE Atlantic). Three different designs of a new quay are evaluated with the environmental objective of maximizing water renewal. Water circulation and renewal is obtained from the implementation of a numerical model validated with observations for each of the three designs. Integral and local parameterizations of water renewal, derived from numerical analyses of Eulerian tracers, were used to determine flushing in the three different design scenarios. Local characterization of water renewal confirmed a significant spatial variability. Consequently, the results proved that an integral description can result in a misleading analysis of water renewal. A comparative analysis suggests the best solution from an environmental perspective and allows the evaluation of the modification in water renewal from the original configuration. These results can be extrapolated to other cases with similar geometries and tidal range. The proposed methodology (based on a practical example) can also be used to support exploitation decisions or contingency plans to mitigate spills or manoeuvrability accidents.

  • Sea wave propagation from offshore to Maputo's coast. Application to longshore sediment transport assessment

     Viola, Cristina N. A.; Grifoll Colls, Manel; Palalane, Jaime; Castro Alves Oliveira, Tiago
    Water science and technology
    Vol. 69, num. 12, p. 2438-2445
    DOI: 10.2166/wst.2014.162
    Date of publication: 2014-01-01
    Journal article

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    This study aims to characterize the wave climate near the coastal region of Maputo (Mozambique), and to provide a first assessment of the sediment transport load in this area. A time-series of 13 years' worth of offshore wave data, obtained from reanalysis products, was propagated to the coast. Wave propagation was performed using Linear Wave theory and the numerical model, Simulating WAves Nearshore (SWAN). Propagations with SWAN were carried out considering different scenarios in order to evaluate the influence of parameters such as wind, tidal level, frequency spectrum and numerical mesh resolution on wave characteristics along the coast. The prevalent waves propagated came from between east and southwest directions. Results from linear propagation were used to estimate the potential longshore sediment transport. The Coastal Engineering Research Center formula was applied for a stretch of beach in the Machangulo Peninsula. A net potential rate of longitudinal sediment transport (of the order of 10(5) m(3)/year, along an extension of the coast of 21 km) was directed northwards, and was consistent with the frequent wave directions.

  • A synergetic combination of measurements and models to assess renewable wind energy in semi enclosed domains  Open access

     Sanchez-arcilla Conejo, Agustin; González Marco, Daniel; Sospedra Iglesias, Joaquin; Sierra Pedrico, Juan Pablo; Espino Infantes, Manel; Grifoll Colls, Manel; Pallares Lopez, Elena
    International Workshop on Marine Technology
    p. 74
    Presentation's date: 2013-10-11
    Presentation of work at congresses

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    The paper presents the need to combine high resolution simulations and observations for calculating in a robust manner the highly variable wind, wave and circulation conditions off the Catalan coast. It discusses the limitations of both instrumental equipment and numerical codes and how they must be validated and combined for semi enclosed domains, illustrated here by the Catalan shelf sea.

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    Seasonal circulation over the Catalan inner-shelf (northwest Mediterranean Sea)  Open access

     Grifoll Colls, Manel; Aretxabaleta, A.; Pelegrí Llopart, José Luis; Espino Infantes, Manel; Wagner, John C; Sanchez-arcilla Conejo, Agustin
    Journal of geophysical research
    Vol. 118, num. 10, p. 5844-5857
    DOI: 10.1002/jgrc.20403
    Date of publication: 2013-10
    Journal article

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    This study characterizes the seasonal cycle of the Catalan inner-shelf circulation using observations and complementary numerical results. The relation between seasonal circulation and forcing mechanisms is explored through the depth-averaged momentum balance, for the period between May 2010 and April 2011, when velocity observations were partially available. The monthly-mean along-shelf flow is mainly controlled by the along-shelf pressure gradient and by surface and bottom stresses. During summer, fall, and winter, the along-shelf momentum balance is dominated by the barotropic pressure gradient and local winds. During spring, both wind stress and pressure gradient act in the same direction and are compensated by bottom stress. In the cross-shelf direction the dominant forces are in geostrophic balance, consistent with dynamic altimetry data. Key Points A hydrodynamic model is implemented for the first time in Catalan inner-shelf. Frictional and pressure gradient are revealed as the main forcing mechanisms A clear seasonal pattern is found in the current velocity.

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    Observing shoreline fluxes: implications for swash and surf zone modeling  Open access

     Sanchez-arcilla Conejo, Agustin; Caceres Rabionet, Ivan; Grifoll Colls, Manel
    International Conference on Coastal Dynamics
    p. 1417-1425
    Presentation's date: 2013-06-26
    Presentation of work at congresses

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    The scarcity of reliable and controlled observations of water and sediment fluxes near the shore is one of the main reasons for the many remaining challenges in the field of morphodynamics. In this paper we shall present three largescale data sets from the CIEM flume of the Maritime Engineering Laboratory (LIM/UPC) in Barcelona, looking for the distinctive behaviour of such fluxes between erosive and accretive conditions. Two different erosive conditions are presented, which report an expected different behaviour of the bar and measured physical parameters (wave height, velocity and suspended sediment cocentration). These erosive time series also report an unexpected similitude on the profile comparisson between both data sets from the bar until the shoreline. The acquired data under accretive conditions present the important control played by the initial bar, controlling the hydrodynamics of the surf and swash zones.

  • High resolution coupled meteo-oceanographic simulations

     Sanchez-arcilla Conejo, Agustin; Grifoll Colls, Manel; Pallares Lopez, Elena; Espino Infantes, Manel
    Computational Methods for Coupled Problems in Science and Engineering
    p. 1
    Presentation's date: 2013-06-19
    Presentation of work at congresses

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  • PREMI A LA MILLOR RECERCA

     Sanchez-arcilla Conejo, Agustin; Sierra Pedrico, Juan Pablo; Espino Infantes, Manel; Mösso Aranda, Octavio Cesar; Mestres Ridge, Marc; Puigdefabregas Sagrista, Juan; Cateura Sabri, Jordi; González Marco, Daniel; Tolosana Delgado, Raimon; Sospedra Iglesias, Joaquin; Alomar Dominguez, Marta; Grifoll Colls, Manel; Gracia Garcia, Vicente
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  • Energía renovable marina en la costa Catalana: una evaluación del recurso mediante simulaciones de alta resolución

     Espino Infantes, Manel; Grifoll Colls, Manel; Pallares Lopez, Elena; Sospedra Iglesias, Joaquin; González Marco, Daniel; Sanchez-arcilla Conejo, Agustin
    Jornadas Españolas de Costas y Puertos
    p. 124-125
    Presentation's date: 2013-05-07
    Presentation of work at congresses

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  • Gestión del riesgo costero mediante sistemas de predicción morfodinámica

     Garcia Leon, Manuel; Gracia Garcia, Vicente; Grifoll Colls, Manel; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin
    Jornadas Españolas de Costas y Puertos
    p. 134-135
    Presentation's date: 2013-05-07
    Presentation of work at congresses

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  • Sistemas operacionales de predicción de corrientes en los puertos de Vigo y A Coruña

     Grifoll Colls, Manel; Lopez Marco, Jaime; Cerralbo Peñarroya, Pablo; García Sotillo, Marcos; Lorente Jiménez, Pablo; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin; Álvarez Fanjul, Enrique
    Jornadas Españolas de Costas y Puertos
    p. 232-233
    Presentation's date: 2013-05-07
    Presentation of work at congresses

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  • Suspended sediment observations in the Barcelona inner-shelf during storms

     Grifoll Colls, Manel; Gracia Garcia, Vicente; Fernández, Juan; Espino Infantes, Manel
    International Coastal Symposium
    p. 1533-1538
    Presentation's date: 2013-04-11
    Presentation of work at congresses

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    This contribution describes in detail the Suspended Sediment Concentration (SSC) obtained from an observational set at 24 m depth in the Catalan inner-shelf (North-western Mediterranean Sea) analysing the dominant processes affecting sediment dynamics during storm events. A clear correlation between SSC, energetic waves, and along-shelf currents events has been found. Peaks in river discharge associated to rainy events are also correlated with SSC measurements. Measured conditions highlight the different sediment dynamic situations present during short-term events such as “wet” and “dry” storms with similar wave height. SSC observed during "dry" conditions are correlated with wave action. On the other hand, SSC peaks during "wet" conditions are primarily caused by wave action, along-shelf current, and river discharge. Observed sediment fluxes during storms are larger in spring than during fall. Although the observations present similar characteristics to other inner-shelf regions in the NW Mediterranean Sea, the results reveal a non-negligible influence of the along-shelf current in sediment dynamics. The results presented here contribute to advance in the understanding of sediment dynamics in wave-dominated regions such as the Catalan shelf.

  • High-resolution modelling of waves, currents and sediment transport in the Catalan Sea

     Sanchez-arcilla Conejo, Agustin; Grifoll Colls, Manel; Pallares Lopez, Elena; Espino Infantes, Manel
    European Geosciences Union General Assembly
    p. 4557
    Presentation's date: 2013-04-11
    Presentation of work at congresses

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  • Field_ac: a research project on ocean modelling in coastal areas: the experience in the Catalan Sea

     Grifoll Colls, Manel; Pallares Lopez, Elena; Tolosana Delgado, Raimon; Fernández Sainz, Juan; Lopez Marco, Jaime; Mösso Aranda, Octavio Cesar; Hermosilla Larrasoaña, Fernando; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin
    European Geosciences Union General Assembly
    p. 8319
    Presentation's date: 2013-04-11
    Presentation of work at congresses

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  • Breaching of a barrier beach under extreme events: the role of morphodynamic simulations

     Gracia Garcia, Vicente; Garcia Leon, Manuel; Grifoll Colls, Manel; Sanchez-arcilla Conejo, Agustin
    International Coastal Symposium
    p. 951-956
    Presentation's date: 2013-04-10
    Presentation of work at congresses

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    A study of three breaching episodes of the Trabucador barrier beach (Spanish Mediterranean coast) is presented. The analysis is done from a modeling perspective using XBEACH and SWAN. The morphodynamic model (XBEACH) has been validated with the available information. The so obtained Brier Skill Score index has been 0.44 which can be considered as acceptable. Results indicate that in all cases breaching was taking place after 8 hours of wave action (storm) or less. Besides, four main parameters control the final morphodynamic response of the barrier: the storm intensity, the water level and the initial emerged topography and the storm duration. Major breaching occurs when swell waves are in coincidence with high water levels whereas if they are uncoupled the barrier tends to be breached by a diversity of smaller channels.

  • Meteo-oceanographic simulations and observations to assess the potential of offshore wind farm in a NW Mediterranean shelf

     Sanchez-arcilla Conejo, Agustin; González Marco, Daniel; Sospedra Iglesias, Joaquin; Palomares, Ana; Sierra Pedrico, Juan Pablo; Schuon, Frieder; Espino Infantes, Manel; Grifoll Colls, Manel; Pallares Lopez, Elena; Jiménez, Pedro Angel; Navarro, Jorge
    International Coastal Symposium
    p. 1651-1656
    Presentation's date: 2013-04-10
    Presentation of work at congresses

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    Renewable marine energy is important in squeezed Mediterranean coastal zones. Wind turbines deployed over the narrow Catalan continental shelf require accurate wind/wave/current fields for a reliable design, operation and maintenance. This paper presents the large (comparative to other open sea areas) errors in meteo-oceanographic predictions for semi enclosed domains such as the coastal sea off the Ebro Delta coast. The emphasis is on the sequence of high resolution coupled and nested models and the role of in situ collocated measurements for calibration and validation.

  • Meteo-oceanographic simulations and observations to assess the potential of offshore wind farm in a NW Mediterranean shelf

     Sanchez-arcilla Conejo, Agustin; González Marco, Daniel; Sospedra Iglesias, Joaquin; Palomares, Ana; Sierra Pedrico, Juan Pablo; Schuon, Frieder; Espino Infantes, Manel; Grifoll Colls, Manel; Pallares Lopez, Elena; Jiménez, Pedro Angel; Navarro, Jorge
    Journal of coastal research
    num. Special Issue 65, p. 1651-1656
    Date of publication: 2013-04-10
    Journal article

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  • Suspended sediment observations in the Barcelona inner-shelf during storms

     Grifoll Colls, Manel; Gracia Garcia, Vicente; Fernández, Juan; Espino Infantes, Manel
    Journal of coastal research
    num. Special Issue 65, p. 1533-1538
    DOI: 10.2112/S165-259.1
    Date of publication: 2013-04-09
    Journal article

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    This contribution describes in detail the Suspended Sediment Concentration (SSC) obtained from an observational set at 24 m depth in the Catalan inner-shelf (North-western Mediterranean Sea) analysing the dominant processes affecting sediment dynamics during storm events. A clear correlation between SSC, energetic waves, and along-shelf currents events has been found. Peaks in river discharge associated to rainy events are also correlated with SSC measurements. Measured conditions highlight the different sediment dynamic situations present during short-term events such as "wet" and "dry" storms with similar wave height. SSC observed during "dry" conditions are correlated with wave action. On the other hand, SSC peaks during "wet" conditions are primarily caused by wave action, along-shelf current, and river discharge. Observed sediment fluxes during storms are larger in spring than during fall. Although the observations present similar characteristics to other inner-shelf regions in the NW Mediterranean Sea, the results reveal a non-negligible influence of the along-shelf current in sediment dynamics. The results presented here contribute to advance in the understanding of sediment dynamics in wave-dominated regions such as the Catalan shelf.

  • Breaching of a barrier under extreme events: the role of morphodynamic simulations

     Gracia Garcia, Vicente; Garcia Leon, Manuel; Grifoll Colls, Manel; Sanchez-arcilla Conejo, Agustin
    Journal of coastal research
    num. Special Issue 65, p. 951-956
    DOI: 10.2112/S165-161.1
    Date of publication: 2013-04-09
    Journal article

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    A study of three breaching episodes of the Trabucador barrier beach (Spanish Mediterranean coast) is presented. The analysis is done from a modeling perspective using XBEACH and SWAN. The morphodynamic model (XBEACH) has been validated with the available information. The so obtained Brier Skill Score index has been 0.44 which can be considered as acceptable. Results indicate that in all cases breaching was taking place after 8 hours of wave action (storm) or less. Besides, four main parameters control the final morphodynamic response of the barrier: the storm intensity, the water level and the initial emerged topography and the storm duration. Major breaching occurs when swell waves are in coincidence with high water levels whereas if they are uncoupled the barrier tends to be breached by a diversity of smaller channels.

  • Predictability of currents on a mesotidal estuary (Ria de Vigo, NW Iberia)

     Cerralbo Peñarroya, Pablo; Grifoll Colls, Manel; Espino Infantes, Manel; Lopez Marco, Jaime
    Ocean dynamics
    Vol. 63, num. 2-3, p. 131-141
    DOI: 10.1007/s10236-012-0586-9
    Date of publication: 2013-03
    Journal article

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  • DESARROLLO DE UNA HERRAMIENTA DE ALTA RESOLUCION COMO SOPORTE AL DISEÑO, COLOCACION Y EXPLOTACION DE INSTALACIONES PARA ENERGIAS MARINAS

     Cerralbo Peñarroya, Pablo; Mestres Ridge, Marc; Mösso Aranda, Octavio Cesar; Grifoll Colls, Manel; Sierra Pedrico, Juan Pablo
    Competitive project

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  • MAR2: Mar y Ambiente Marino

     Sospedra Iglesias, Joaquin; González Marco, Daniel; Grifoll Colls, Manel; Puigdefabregas Sagrista, Juan; Cateura Sabri, Jordi; Espino Infantes, Manel
    Competitive project

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  • Numerical simulations and observations for offshore wind farms in a NW Mediterranean shelf

     Sanchez-arcilla Conejo, Agustin; González Marco, Daniel; Sospedra Iglesias, Joaquin; Palomares, Ana; Sierra Pedrico, Juan Pablo; Schuon, Frieder; Espino Infantes, Manel; Grifoll Colls, Manel; Pallares Lopez, Elena; Jiménez, Pedro Angel; Navarro, Jorge
    Journal of coastal research
    num. Special Issue 65, p. 1651-1656
    DOI: 10.2112/SI65-279.1
    Date of publication: 2013-01-01
    Journal article

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    Renewable marine energy is important in squeezed Mediterranean coastal zones. Wind turbines deployed over the narrow Catalan continental shelf require accurate wind/wave/current fields for a reliable design, operation and maintenance. This paper presents the large (comparative to other open sea areas) errors in meteo-oceanographic predictions for semi enclosed domains such as the coastal sea off the Ebro Delta coast. The emphasis is on the sequence of high resolution coupled and nested models and the role of in situ collocated measurements for calibration and validation.

  • Water renewal and risk assessment of water pollution in semi-enclosed domains: Application to Bilbao Harbour (Bay of Biscay)

     Grifoll Colls, Manel; Del Campo, Andrea; Espino Infantes, Manel; Mader, Julien; González, Manuel; Borja, Angel
    Journal of marine systems
    Vol. 109-110, num. Suppl., p. S241-S251
    DOI: 10.1016/j.jmarsys.2011.07.010
    Date of publication: 2013-01
    Journal article

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  • Circulación en el interior de la plataforma catalana: observaciones y modelado numérico

     Grifoll Colls, Manel; Aretxabaleta, A.; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin
    Encuentro Oceanografía Física Española
    p. 1
    Presentation's date: 2012-11-22
    Presentation of work at congresses

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  • Respuesta hidrodinámica a un evento de brisa marina en la bahía dels Alfacs (Delta del Ebre)

     Cerralbo Peñarroya, Pablo; Grifoll Colls, Manel; Cateura Sabri, Jordi; Puigdefabregas Sagrista, Juan; Sospedra Iglesias, Joaquin; Espino Infantes, Manel
    Encuentro Oceanografía Física Española
    p. 1
    Presentation's date: 2012-11-14
    Presentation of work at congresses

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  • Predictabilidad de las corrientes superficiales en un estuario mesomareal (Ría de Vigo)

     Espino Infantes, Manel; Cerralbo Peñarroya, Pablo; Grifoll Colls, Manel; Lopez Marco, Jaime; Sotillo, Marcos G.; Álvarez Fanjul, Enrique
    Encuentro Oceanografía Física Española
    p. 1
    Presentation's date: 2012-11-14
    Presentation of work at congresses

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  • Suspended sediment fluxes near the break zone under moderate energy conditions

     Gracia Garcia, Vicente; Garcia Leon, Manuel; Sospedra Iglesias, Joaquin; Grifoll Colls, Manel; Caceres Rabionet, Ivan; Sánchez, José Francisco; Sanchez-arcilla Conejo, Agustin
    Particles in Europe
    p. 38-40
    Presentation's date: 2012-10-18
    Presentation of work at congresses

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  • Along-shelf current variability on the Catalan inner-shelf (NW Mediterranean)

     Grifoll Colls, Manel; Aretxabaleta, L.; Espino Infantes, Manel; Warner, J.C
    Journal of geophysical research
    Vol. 117, num. C9, p. 1-14
    DOI: 10.1029/2012JC008182
    Date of publication: 2012-09
    Journal article

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  • Access to the full text
    Incorporation of continental and urban run-off into a coastal circulation model: application to the Catalan coast  Open access

     Liste, Maria; Grifoll Colls, Manel; Keupers, Ingrid; Monbaliu, Jaak; Espino Infantes, Manel
    International Conference on Coastal Engineering
    p. 1-8
    Presentation's date: 2012-07-06
    Presentation of work at congresses

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    A 3D hydrodynamical model has been set up to incorporate the continental and urban run-off into the Catalan Coastal waters. Particular attention was paid to introducing correctly the freshwater plumes and attention was also paid to determinate the influence of the land discharge profile with regard to the distributed continental run-off. The model domain includes a small part of the Catalan Coast where the combination of local land topography with torrential rainfall caused considerable local runoff on a short period of time with a large impact on the receiving coastal waters. The Regional Ocean Modeling System (ROMS) simulations were used to examine the dispersal to a freshwater delivery from two relevant event; a low river discharge typical of mean conditions during April 2011 and a high discharge representative of the storm event during March 2011 are considered. We have observed the plume responses to an abrupt change in river discharge. During the mean conditions, low salinity water is concentrated around the rivers mouth while during the flood event, the plume spread offshore in the direction of river water outflow and turned downstream close to the coast. The differences between a simulation including the river outflow as a land forcing and a simulation including river and urban runoff as a land forcing suggested that the urban runoff plays an important role in the spreading and shape of the river plume.

  • Access to the full text
    Operational forecast of beach morphodynamics: reliability and prediction limits  Open access

     Sanchez-arcilla Conejo, Agustin; Gracia Garcia, Vicente; Grifoll Colls, Manel; Garcia Leon, Manuel; Pallarés, Elena
    International Conference on Coastal Engineering
    p. 1-11
    DOI: 10.9753/icce.v33.sediment.36
    Presentation's date: 2012-07-06
    Presentation of work at congresses

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    The paper presents a nested and coupled modelling suite including meteorological, waves, currents and morphodynamics sub-routines. The sequence has been applied to two distinctiv e beaches along the Catalan coast in the Spanish Mediterranean. Models and observations from two intensive campaigns have been compared to establish the accuracy and reliability of morphodynamic simulations, with the aim to determine uncertainty intervals and to assess the suitability of using such a modelling tool for reducing storm induced risks in beach management.

  • Coupled modelling of waves and currents on the Catalan shelf

     Espino Infantes, Manel; Pallarés, Elena; Grifoll Colls, Manel; Sanchez-arcilla Conejo, Agustin
    International Conference on Coastal Engineering
    p. 1
    Presentation's date: 2012-07-05
    Presentation of work at congresses

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  • Operational forecast of beach morphodynamics: reliability and prediction limits

     Sanchez-arcilla Conejo, Agustin; Gracia Garcia, Vicente; Grifoll Colls, Manel; García, Manuel; Solé Tasies, Josep María
    International Conference on Coastal Engineering
    p. 1
    Presentation's date: 2012-07-02
    Presentation of work at congresses

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  • Sediment dispersal mechanism in North-western Mediterranean Sea during a storm event due to a flash-flood river

     Fernández, J.; Grifoll Colls, Manel; Espino Infantes, Manel
    European Geosciences Union General Assembly
    p. 1
    Presentation's date: 2012-04-26
    Presentation of work at congresses

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  • Current variability and momentum balance in the along-shore flow for the Catalan inner-shelf

     Grifoll Colls, Manel; Aretxabaleta, A.; Espino Infantes, Manel; Warner, J.C
    European Geosciences Union General Assembly
    p. 1
    Presentation's date: 2012-04-26
    Presentation of work at congresses

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  • Multi-scale coupled modelling of waves and currents on the Catalan shelf

     Grifoll Colls, Manel; Warner, J.C; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin
    European Geosciences Union General Assembly
    p. 1
    Presentation's date: 2012-04-25
    Presentation of work at congresses

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  • Modelado y tecnologías de observación avanzadas para estudiar procesos de transporte, constituyentes ópticos activos y variabilidad

     Sospedra Iglesias, Joaquin; Puigdefabregas Sagrista, Juan; Cateura Sabri, Jordi; Grifoll Colls, Manel; Cerralbo Peñarroya, Pablo; Espino Infantes, Manel
    Competitive project

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  • Water circulation forecasting in Spanish harbours

     Grifoll Colls, Manel; Jorda Sanchez, Gabriel; Sotillo, Marcos G.; Ferrer, Luis; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin; Alvarez-Fanjul, Enrique
    Scientia marina
    Vol. 76, num. Supl. 1, p. 45-61
    DOI: 10.3989/scimar.03606.18B
    Date of publication: 2012
    Journal article

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  • Coastal-scale oceanographic forecasts: the FIELD_AC project

     Sanchez-arcilla Conejo, Agustin; Grifoll Colls, Manel; Tolosana Delgado, Raimon; Pallarés, E.; Mösso Aranda, Octavio Cesar; Espino Infantes, Manel; Sierra Pedrico, Juan Pablo
    Symposium on the Future of Operational Oceanography
    p. 1-27
    Presentation's date: 2011-10-26
    Presentation of work at congresses

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  • Caracterização da agitação marítima ao largo de Maputo

     Guiloviça, C.B.; Castro Alves Oliveira, Tiago; Palalane, J.; Grifoll Colls, Manel; Gomez Aguar, Jesus Javier; Espino Infantes, Manel
    Jornadas Portuguesas de Engenharia Costeira e Portuária
    p. 1-15
    Presentation's date: 2011-10-06
    Presentation of work at congresses

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    O objectivo deste trabalho é fazer a caracterização da agitação marítima ao largo de Maputo. Na ausência de dados de bóias e dados visuais que permitissem executar uma caracterização da agitação a longo prazo optou-se pela utilização de dados numéricos de retro-analise. Utilizaram-se resultados das predições oceânicas de escala global da NOAA/NWS/NCEP (National Oceanic and Atmospheric Admistration, National Wether Service, National Center for Environmental Prediction, as três dos Estados Unidos da America) que tem como base o modelo numérico WAVEWATCH III (Tolman, 2002) que utiliza dados do NCEP para definir as condições fronteira para o modelo. Efectuou-se uma analise a longo prazo tanto do clima médio como extremo e estudaram-se quais as funções de distribuição de probabilidade para análise extrema (Lognormal, Exponencial, Weibull, Gumbel e Frechet) melhor se adaptam ao clima marítimo da região. Os resultados serão apresentados com o objectivo de compreender que condições de agitação marítimas devem ser utilizadas no dimensionamento de estruturas (para diferentes períodos de retorno) bem como para estudos relacionados com transporte de sedimentos.

  • Wave and current fields at the Barcelona coast

     Pallares Lopez, Elena; Grifoll Colls, Manel; Alomar Dominguez, Marta; Tolosana Delgado, Raimon; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin
    EuroGOOS Conference
    p. 63
    Presentation's date: 2011-10-04
    Presentation of work at congresses

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  • Implementation of an operational current forecast system for Vigo and A Coruña harbours

     Cerralbo Peñarroya, Pablo; Grifoll Colls, Manel; Pérez, E.; Gomez, B.; Venancio, A.; Pérez-Muñuzuri, V.; Espino Infantes, Manel
    EuroGOOS Conference
    p. 66
    Presentation's date: 2011-10-04
    Presentation of work at congresses

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