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  • Numerical assessment of the dispersion of overspilled sediment from a dredge barge and its sensitivity to various parameters

     Mestres Ridge, Marc; Sierra Pedrico, Juan Pablo; Mösso Aranda, Octavio Cesar; Sanchez-arcilla Conejo, Agustin; Hernaez, Mario; Morales, Jorge
    Marine pollution bulletin
    Vol. 79, num. 1-2, p. 225-235
    DOI: 10.1016/j.marpolbul.2013.12.009
    Date of publication: 2014-02-15
    Journal article

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    Marine dredging operations are not uncommon in coastal waters since they are necessary for several beneficial uses, such as harbour maintenance, beach nourishment or removal/capping of pollutants, amongst others. They also constitute a significant risk for the environment, changing its physical, chemical and biological characteristics, as evidenced by many authors. In this study, two numerical models are used to simulate the dispersion pattern of fine suspended sediment spilled from a dredge barge, considering different hydrodynamic scenarios, particle sizes and dredging tracks in a mesotidal environment. The results show that, in this particular case, the currents (largely induced by the tide) are the main responsible for the final disposition of the settled particles, being the other variables of secondary importance. (C) 2013 Elsevier Ltd. All rights reserved.

  • Shifting perspectives on coastal impacts and adaptation

     Brown, Sally; Nicholls, Robert J. Nicholls; Hanson, Susan; Jimenez Quintana, Jose Antonio; Sanchez-arcilla Conejo, Agustin
    Nature Climate Change
    Vol. 4, p. 752-755
    DOI: 10.1038/nclimate2344
    Date of publication: 2014-09
    Journal article

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    With the release of the Intergovernmental Panel on Climate Change¿s Fifth Assessment Report (IPCC AR5), climate change has again been identified as an important driver of change. Coasts are particularly vulnerable, directly affected by increasing sea levels and storminess, and other climate drivers, and accentuated by converging indirect landward and seaward influences. Adverse consequences include increased flooding, salinisation, erosion, and wetland and biodiversity loss. Several recent extreme meteorological events have caused catastrophic human and economic losses in coastal areas, including Cyclone Nargis (Myanmar, 2008), storm Xynthia (France, 2010), Hurricane Sandy (eastern United States, Canada and Caribbean, 2012) and Typhoon Haiyan (Philippines, 2013). Although coasts have always been hazardous places to live, global economic losses have significantly increased in recent decades. Climate change is exacerbating those risks. This article demonstrates how successive IPCC coastal chapters, have shifted from impacts to adaptation, assessing the relative role of climate change within a broader environmental framework, with increasing clarity and nuance, despite continuing uncertainties.

  • Análisis (probabilístico) de los usos en zona costera basado en la vulnerabilidad debida a la erosión/inundación resultantes de la acción del oleaje

     Gomez Aguar, Jesus Javier; Caceres Rabionet, Ivan; Gonzalez Marco, Daniel; Sanchez-arcilla Conejo, Agustin
    Competitive project

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  • Use of seagrass meadows as an adaptation measure to climate change for reducing port agitation

     Sanchez-arcilla Conejo, Agustin; Lin Ye, Jue; Sierra Pedrico, Juan Pablo; Gracia Garcia, Vicente; Casas Prat, Merce; Virgili, Marc
    European Geosciences Union General Assembly
    p. 1
    Presentation's date: 2014-05-01
    Presentation of work at congresses

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  • Analysis of the performance of swash in harbour domains

     Alabart Llinàs, Joan; Sanchez-arcilla Conejo, Agustin; Van Vledder, Gerbrant
    IAHR Europe Congress
    p. 53-54
    Presentation's date: 2014-04-15
    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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  • Laboratory effects on measuring impact load son rigid coastal structures

     Marzeddu, Andrea; Gironella i Cobos, Framcesc Xavier; Sanchez-arcilla Conejo, Agustin; Sutherland, James
    IAHR Europe Congress
    p. 59
    Presentation's date: 2014-04-15
    Presentation of work at congresses

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    Some small scale laboratory experiments were carried out in order to detect laboratory effects during the measurement of wave loads on rigid structures. Wave loads on rigid structures are divided into quasi static loads and impact loads. How will be demonstrated in this paper, the measure of quasi static loads is fairly easy and not affected by the sample frequency. Instead the measure of impact load is very difficult and some laboratory effects can strongly influence the results and lead at an unsafe estimation of the total load. Particularly, the use of different equipment and sensors can lead to significant differences in the results, so, for this reason, a comparison between load cells and pressure transducers recorded under the same wave attack were made. Impulsive wave loads are very fast and are characterized by a very short rise time (some milliseconds) and the results, also under regular waves attack, are very scattered. For that reasons a higher frequency sampler (up to 19.2 KHz) was used in order to study how the use of different sample frequencies can lead to very different results. In principle the utilization of a sample frequency that is too low can lead again to an unsafe estimation of the total load and affect the design process. Besides, due to the large scatter on the data, a deterministic approach is inadvisable and some repetitions of the same wave attack are needed in order to be sure to well characterize the studied phenomena. The obtained results show the probabilistic performance inherent to the impact loads phenomena as source of the scattered results.

  • Comparison of extreme in the North Atlantic and Mediterranean

     Ponce de León Alvarez, Sonia; Gomez Aguar, Jesus Javier; Sanchez-arcilla Conejo, Agustin; Guedes Soares, Carlos
    IAHR Europe Congress
    p. 296
    Presentation's date: 2014-04-15
    Presentation of work at congresses

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    A spectral characterization of two extreme storms is made using numerical wave hindcasts produced with the WAM model validated with wave buoys records in two different basins: the North Atlantic Ocean and the Mediterranean Sea. The results show that despite the different magnitude of the storms the directional wave spectra had similar distribution over frequencies and directions in both cases. All the single peaked spectra associated with the Quirin storm in the North Atlantic show a maximum spectral peak around 0.05 Hz (about 20 seconds). For the storms in the Mediterranean, having lower wave energy, the swell absolute peak was found at a frequency around 0.08 Hz (12.5 seconds). The North Atlantic storm had longer duration (in average 6-7 days) than the Mediterranean storms (4-5 days). The maximum peak period in the North Atlantic was higher than 20 seconds in contrast with the 12.5 seconds maximum of the Mediterranean storms. The lowest directional spreading associated to the extreme values of the Hs (significant wave height) was found to be similar in both basins (24º).

  • 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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  • Improving the wave forecast in the Catalan Coast

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

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  • Wave extremes off the Catalan coast: time and space-time domains analyses

     Barbariol, Francesco; Sanchez-arcilla Conejo, Agustin; Carniel, Sandro; Sclavo, Mauro; Sierra Pedrico, Juan Pablo; Benetazzo, Alvise
    European Geosciences Union General Assembly
    Presentation's date: 2014-05-01
    Presentation of work at congresses

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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.

  • Impulsive wave loads on rigid structures, an experimental approach

     Marzeddu, Andrea; Gironella i Cobos, Framcesc Xavier; Sanchez-arcilla Conejo, Agustin
    Journal of coastal research
    Vol. 65, num. Special Issue 65, p. 332-337
    DOI: 10.2112/SI65-057
    Date of publication: 2013-03-06
    Journal article

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    Within the European project 'Hydralab IV', HyRes we aim to improve the characterization of wave loads on rigid structures and the associated response by carrying out some laboratory experiments. Wave loads on rigid structures are divided into quasi static loads and impact loads. If the physics of quasi-static loads due to waves is well known, this cannot be said the same for wave impact loads. A comprehensive method to design maritime rigid structures under impact loads does not exist yet and the actual design method suggests avoiding scenarios where impact loads can take place. In the last decade, some laboratory experiments have been carried out; however some questions remain still unanswered. The use of different sensors can lead to significant changes in the results and an "exhaustive comparison" between dissimilar types of sensors has not been done yet. Even the magnitude of these forces can be underestimated during a laboratory test just for the choice of sample frequencies which are too low. This paper describes the experiments performed on a small scale flume at UPC on a scaled vertical breakwater in order to compare the results of pressure transducers and force load cells. Moreover, a high frequency sampler (up to 20 KHz) was used in order to understand the importance of sample frequency on the magnitude of the results. A simplified scenario has been set up in order to make the data analysis easier. © Coastal Education & Research Foundation 2013.

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

     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.

  • 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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  • Wave energy resource assessment in Lanzarote (Spain)

     Sierra Pedrico, Juan Pablo; González Marco, Daniel; Sospedra Iglesias, Joaquin; Gironella i Cobos, Framcesc Xavier; Mösso Aranda, Octavio Cesar; Sanchez-arcilla Conejo, Agustin
    Renewable energy
    Vol. 55, p. 480-489
    DOI: 10.1016/j.renene.2013.01.004
    Date of publication: 2013-07
    Journal article

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  • 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.

  • Chapter 5: Integration of the climate impact assessments with future projections

     Goodess, Clare M.; Agnew, Maureen D.; Giannakopoulos, Christos; Hemming, Debbie; Salem, Skander Ben; Bindi, Marco; Nejmeddine Bradai, Mohamed; Congedi, Letizia; Dibari, Camilla; El-Askary, Hesham; El-Fadel, Mutasem; El-Raey, Mohamed; Ferrise, Roberto; Founda, Dimitra; Grünzweig, José M.; Harzallah, Ali; Hatzaki, Maria; Kay, Gillian; Lionello, Piero; Mösso Aranda, Octavio Cesar; Oweis, Theib; Sierra Pedrico, Juan Pablo; Psiloglou, Basil; Reale, Marco; Sanchez-arcilla Conejo, Agustin; Senouci, Mohamed; Tanzarella, Annalisa; Varotsos, Konstantinos V.
    DOI: 10.1007/978-94-007-5769-1
    Date of publication: 2013
    Book chapter

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    En aquest volum el grup del Laboratori d¿Enginyeria Marítima (LIM) de la Universitat Politècnica de Catalunya (UPC) s¿ha centrat en l¿estudi dels impactes del canvi climàtic a la zona costera del Mediterrani espanyol que inclou a Catalunya i Valencia. Son els resultats del projecte Europeu CIRCE - Climate Change and Impact Research: The Mediterranean Environment (6th Framework Programme FP6 - Contract nº360961).

  • Chapter 4: Climate impact assessments

     Hemming, Debbie; Agnew, Maureen D.; Goodess, Clare M.; Giannakopoulos, Christos; Salem, Skander Ben; Bindi, Marco; Nejmeddine Bradai, Mohamed; Congedi, Letizia; Dibari, Camilla; El-Askary, Hesham; El-Fadel, Mutasem; El-Raey, Mohamed; Ferrise, Roberto; Grünzweig, José M.; Harzallah, Ali; Hattour, Abdallah; Hatzaki, Maria; Kanas, Dina; Lionello, Piero; McCarthy, Mark; Mösso Aranda, Octavio Cesar; Oweis, Theib; Sierra Pedrico, Juan Pablo; Psiloglou, Basil; Reale, Marco; Sanchez-arcilla Conejo, Agustin; Senouci, Mohamed; Tanzarella, Annalisa
    DOI: 10.1007/978-94-007-5769-1
    Date of publication: 2013
    Book chapter

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    En aquest volum el grup del Laboratori d¿Enginyeria Marítima (LIM) de la Universitat Politècnica de Catalunya (UPC) s¿ha centrat en l¿estudi dels impactes del canvi climàtic a la zona costera del Mediterrani espanyol que inclou a Catalunya i Valencia. Son els resultats del projecte Europeu CIRCE - Climate Change and Impact Research: The Mediterranean Environment (6th Framework Programme FP6 - Contract nº360961).

  • Chapter 6: Synthesis and the assessment of adaptation measures

     Goodess, Clare M.; Agnew, Maureen D.; Hemming, Debbie; Giannakopoulos, Christos; Bindi, Marco; Dibari, Camilla; El-Askary, Hesham; El-Fadel, Mutasem; El-Hattab, Mamdouh; El-Raey, Mohamed; Ferrise, Roberto; Grünzweig, José M.; Harzallah, Ali; Kanas, Dina; Lionello, Piero; Mösso Aranda, Octavio Cesar; Oweis, Theib; Sierra Pedrico, Juan Pablo; Reale, Marco; Sanchez-arcilla Conejo, Agustin; Senouci, Mohamed; Sommer, Rolf; Tanzarella, Annalisa
    DOI: 10.1007/978-94-007-5769-1
    Date of publication: 2013
    Book chapter

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    En aquest volum el grup del Laboratori d¿Enginyeria Marítima (LIM) de la Universitat Politècnica de Catalunya (UPC) s¿ha centrat en l¿estudi dels impactes del canvi climàtic a la zona costera del Mediterrani espanyol que inclou a Catalunya i Valencia. Son els resultats del projecte Europeu CIRCE - Climate Change and Impact Research: The Mediterranean Environment (6th Framework Programme FP6 - Contract nº360961).

  • Chapter 1: Introduction

     Agnew, Maureen D.; Goodess, Clare M.; Hemming, Debbie; Giannakopoulos, Christos; Salem, Skander Ben; Bindi, Marco; Nejmeddine Bradai, Mohamed; Congedi, Letizia; Dibari, Camilla; El-Askary, Hesham; El-Fadel, Mutasem; Ferrise, Roberto; Grünzweig, José M.; Harzallah, Ali; Hattour, Abdallah; Hatzaki, Maria; Kanas, Dina; Kostopoulou, Effie; Lionello, Piero; Oweis, Theib; Pino, Cosimo; Reale, Marco; Sanchez-arcilla Conejo, Agustin; Senouci, Mohamed
    DOI: 10.1007/978-94-007-5769-1
    Date of publication: 2013
    Book chapter

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    En aquest volum el grup del Laboratori d¿Enginyeria Marítima (LIM) de la Universitat Politècnica de Catalunya (UPC) s¿ha centrat en l¿estudi dels impactes del canvi climàtic a la zona costera del Mediterrani espanyol que inclou a Catalunya i Valencia. Son els resultats del projecte Europeu CIRCE - Climate Change and Impact Research: The Mediterranean Environment (6th Framework Programme FP6 - Contract nº360961).

  • Spain

     Gracia Garcia, Vicente; Sanchez-arcilla Conejo, Agustin; Anfuso Melfi, Giorgio
    Date of publication: 2013-02-26
    Book chapter

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  • Chapter 3: Physical and socio-economic indicators

     Agnew, Maureen D.; Goodess, Clare M.; Hemming, Debbie; Giannakopoulos, Christos; Salem, Skander Ben; Bindi, Marco; Nejmeddine Bradai, Mohamed; Dibari, Camilla; El-Askary, Hesham; El-Fadel, Mutasem; El-Raey, Mohamed; Ferrise, Roberto; Grünzweig, José M.; Harzallah, Ali; Hattour, Abdallah; Hatzaki, Maria; Kanas, Dina; Kostopoulou, Effie; Lionello, Piero; Oweis, Theib; Pino, Cosimo; Psiloglou, Basil; Sahabi Abed, Salah; Sanchez-arcilla Conejo, Agustin; Senouci, Mohamed; Zoheir Taleb, Mohamed; Tanzarella, Annalisa
    DOI: 10.1007/978-94-007-5769-1
    Date of publication: 2013
    Book chapter

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    En aquest volum el grup del Laboratori d¿Enginyeria Marítima (LIM) de la Universitat Politècnica de Catalunya (UPC) s¿ha centrat en l¿estudi dels impactes del canvi climàtic a la zona costera del Mediterrani espanyol que inclou a Catalunya i Valencia. Son els resultats del projecte Europeu CIRCE - Climate Change and Impact Research: The Mediterranean Environment (6th Framework Programme FP6 - Contract nº360961).

  • Chapter 2: Stakeholders

     Agnew, Maureen D.; Goodess, Clare M.; Hemming, Debbie; Giannakopoulos, Christos; Bindi, Marco; Dibari, Camilla; El-Askary, Hesham; El-Hattab, Mamdouh; El-Raey, Mohamed; Ferrise, Roberto; Harzallah, Ali; Hatzaki, Maria; Kostopoulou, Effie; Lionello, Piero; Sahabi Abed, Salah; Sanchez-arcilla Conejo, Agustin; Senouci, Mohamed; Sommer, Rolf; Zoheir Taleb, Mohamed; Tanzarella, Annalisa
    DOI: 10.1007/978-94-007-5769-1
    Date of publication: 2013
    Book chapter

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    En aquest volum el grup del Laboratori d¿Enginyeria Marítima (LIM) de la Universitat Politècnica de Catalunya (UPC) s¿ha centrat en l¿estudi dels impactes del canvi climàtic a la zona costera del Mediterrani espanyol que inclou a Catalunya i Valencia. Son els resultats del projecte Europeu CIRCE - Climate Change and Impact Research: The Mediterranean Environment (6th Framework Programme FP6 - Contract nº360961).

  • 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
    Award or recognition

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  • 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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  • Responses to coastal climate change: Innovative Strategies for high End Scenarios -Adaptation and Mitigation-

     Sierra Pedrico, Juan Pablo; Jimenez Quintana, Jose Antonio; Gracia Garcia, Vicente; Mösso Aranda, Octavio Cesar; Mestres Ridge, Marc; Garcia Leon, Manuel; Casas Prat, Merce; González Marco, Daniel; Sanchez-arcilla Conejo, Agustin
    Competitive project

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  • iCoast

     Sanchez-arcilla Conejo, Agustin; Gracia Garcia, Vicente; Espino Infantes, Manel; Garcia Leon, Manuel; Gironella i Cobos, Framcesc Xavier; Lin Ye, Jue
    Competitive project

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  • Access to the full text
    The evolution of mobile bed tests: a step towards the future of coastal engineering  Open access

     Sanchez-arcilla Conejo, Agustin; Caceres Rabionet, Ivan; Thorne, Peter D.; Eiff, Olivier; Lacaze, Laurent; Hurther, David; Barraud, P.A.; Musumerci, Rosaria; Vousdoukas, Michalis; Sancho, Francisco
    International Association for Hydraulic Research Congress
    p. 1-12
    Presentation's date: 2013-09-10
    Presentation of work at congresses

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    Coastal Engineering still presents significant levels of uncertainty, much larger for sediment transport and morphodynamics than for the driving hydrodynamics. Because of that there is still a need for experimental research that addresses the water and sediment fluxes occurring at multiple scales in the near shore and for some of which there are still not universally accepted equations or closure sub-models. Large scale bed tests offer the possibility to obtain undistorted results under controlled conditions that may look at sediment transport and associated bed evolution under a variety of wave and mean water level conditions. The present limitations in conventional observation equipment preclude a clear advancement in knowledge or model calibration. However the new developments in opto-acoustic equipment should allow such an advancement to take place provided the new experimental equipment becomes more robust in parallel with a protocol for deployment and data processing. This paper will present the experimental approach to erosive and accretive beach dynamics, with emphasis on the accretive experiments. These accretive tests still present further uncertainties and sometimes cannot be explained with the present state of the art. Following this there is a presentation of the novel development of an acoustic bed form and suspended sediment imager, able to monitor bed forms near bed sediment transport and their corresponding dynamics. The next section deals with an acoustic high resolution concentration and velocity profiler that is able to infer even the elusive bed level, together with the near bed concentrated sediment transport and the details of fluxes on the stoss and lee sides of moving bed forms. This is followed by a discussion on the merits of novel optic techniques, using structured and unstructured light sources. There is also some remarks on new approaches. Illustrated by the use of ferro-fluids to obtain directly the shear stresses acting on a wall even under the presence of ¿some¿ sediment. The paper ends with some conclusions on the use of such mobile bed tests in present and future Coastal Engineering.

    Coastal Engineering still presents significant levels of uncertainty, much larger for sediment transport and morphodynamics than for the driving hydrodynamics. Because of that there is still a need for experimental research that addresses the water and sediment fluxes occurring at multiple scales in the near shore and for some of which there are still not universally accepted equations or closure sub-models. Large scale bed tests offer the possibility to obtain undistorted results under controlled conditions that may look at sediment transport and associated bed evolution under a variety of wave and mean water level conditions. The present limitations in conventional observation equipment preclude a clear advancement in knowledge or model calibration. However the new developments in opto-acoustic equipment should allow such an advancement to take place provided the new experimental equipment becomes more robust in parallel with a protocol for deployment and data processing. This paper will present the experimental approach to erosive and accretive beach dynamics, with emphasis on the accretive experiments. These accretive tests still present further uncertainties and sometimes cannot be explained with the present state of the art. Following this there is a presentation of the novel development of an acoustic bed form and suspended sediment imager, able to monitor bed forms near bed sediment transport and their corresponding dynamics. The next section deals with an acoustic high resolution concentration and velocity profiler that is able to infer even the elusive bed level, together with the near bed concentrated sediment transport and the details of fluxes on the stoss and lee sides of moving bed forms. This is followed by a discussion on the merits of novel optic techniques, using structured and unstructured light sources. There is also some remarks on new approaches. Illustrated by the use of ferro-fluids to obtain directly the shear stresses acting on a wall even under the presence of “some” sediment. The paper ends with some conclusions on the use of such mobile bed tests in present and future Coastal Engineering.

  • Access to the full text
    On the study of boundary layer sediment transport processes using new developmental acoustic techniques  Open access

     Thorne, Peter D.; Hurther, David; Cooke, Richard D.; Barraud, P.A.; Barnoud, J.M.; Caceres Rabionet, Ivan; Sanchez-arcilla Conejo, Agustin
    International Conference on Coastal Dynamics
    p. 1667-1676
    Presentation's date: 2013-06-26
    Presentation of work at congresses

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    This study aims at presenting a set of novel acoustic flow and sediment measuring tools used in a complementary way for the investigation of fine-scale flow and sediment transport processes above a rippled sand bed under waves. Measurements were conducted in the 100m long wave channel at UPC-LIM with surface gravity waves generating migrating ripples on a mobile sand bed. The set of acoustic instrumentation consisted of an Acoustic 3D Ripple Profiler (3D-ARP), a novel Bedform And Suspended Sediment Imager (BASSI) and three Acoustic Concentration and Velocity Profilers (ACVP). Here we assess the ACVP¿s and the BASSI.

    This study aims at presenting a set of novel acoustic flow and sediment measuring tools used in a complementary way for the investigation of fine-scale flow and sediment transport processes above a rippled sand bed under waves. Measurements were conducted in the 100m long wave channel at UPC-LIM with surface gravity waves generating migrating ripples on a mobile sand bed. The set of acoustic instrumentation consisted of an Acoustic 3D Ripple Profiler (3D-ARP), a novel Bedform And Suspended Sediment Imager (BASSI) and three Acoustic Concentration and Velocity Profilers (ACVP). Here we assess the ACVP’s and the BASSI.

  • 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.

  • The relevance of the whitecapping term in wave forecasting: an analysis for the wave period of the Catalan coast

     Pallares Lopez, Elena; Espino Infantes, Manel; Sanchez-arcilla Conejo, Agustin
    European Geosciences Union General Assembly
    p. 7867
    Presentation's date: 2013-04-11
    Presentation of work at congresses

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  • 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.

  • Corrientes y calidad del agua en ingeniería y gestión portuaria

     Sanchez-arcilla Conejo, Agustin
    Jornada Técnica sobre Sistemas de Monitorización, Predicción y Alertas Meteorológicas y Oceanográficas en el Port de Barcelona
    p. 1-30
    Presentation's date: 2013-04-25
    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.

  • Access to the full text
    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.

    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 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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  • Impulsive wave loads on rigid structure, an experimental approach

     Marzeddu, Andrea; Gironella i Cobos, Framcesc Xavier; Sanchez-arcilla Conejo, Agustin
    International Coastal Symposium
    p. 332
    Presentation's date: 2013-04-10
    Presentation of work at congresses

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    Within the European project ‘Hydralab IV’, HyRes we aim to improve the characterization of wave loads on rigid structures and the associated response by carrying out some laboratory experiments. Wave loads on rigid structures are divided into quasi static loads and impact loads. If the physics of quasi-static loads due to waves is well known, this cannot be said the same for wave impact loads. A comprehensive method to design maritime rigid structures under impact loads does not exist yet and the actual design method suggests avoiding scenarios where impact loads can take place. In the last decade, some laboratory experiments have been carried out; however some questions remain still unanswered. The use of different sensors can lead to significant changes in the results and an “exhaustive comparison” between dissimilar types of sensors has not been done yet. Even the magnitude of these forces can be underestimated during a laboratory test just for the choice of sample frequencies which are too low. This paper describes the experiments performed on a small scale flume at UPC on a scaled vertical breakwater in order to compare the results of pressure transducers and force load cells. Moreover, a high frequency sampler (up to 20 KHz) was used in order to understand the importance of sample frequency on the magnitude of the results. A simplified scenario has been set up in order to make the data analysis easier.

  • 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; López 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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  • 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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  • Assessing wavestorm hazard evolution in the NW Mediterranean with hindcast and buoy data

     Ortego Martinez, Maria Isabel; Tolosana Delgado, Raimon; Gibergans Báguena, José; Egozcue Rubi, Juan José; Sanchez-arcilla Conejo, Agustin
    Climatic change
    Vol. 113, num. 3-4, p. 713-731
    DOI: 10.1007/s10584-011-0388-y
    Date of publication: 2012-07-15
    Journal article

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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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  • Crucial times for Spanish physical oceanography

     Pelegri ., Josep Lluis; Álvarez Fanjul, Enrique; Espino Infantes, Manel; Font Ferré, Jordi; Parrilla, Gregorio; Sanchez-arcilla Conejo, Agustin
    Scientia marina
    Vol. 76, num. Supl. 1, p. 11-28
    DOI: 10.3989/scimar.03604.20A
    Date of publication: 2012-09
    Journal article

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  • Simulation of wave overtopping of maritime structures in a numerical wave flume

     Oliveira, Tiago; Sanchez-arcilla Conejo, Agustin; Gironella i Cobos, Framcesc Xavier
    Journal of applied mathematics
    Vol. 2012, p. 1-19
    DOI: 10.1155/2012/246146
    Date of publication: 2012
    Journal article

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  • Mapas de olas y vientos sobre la mar

     González Marco, Daniel; Sospedra Iglesias, Joaquin; Gironella i Cobos, Framcesc Xavier; Sanchez-arcilla Conejo, Agustin
    Date of publication: 2012
    Book chapter

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  • Generación de olas y esudio del rebase en un canal numérico de oleaje basado en el pfem

     Castro Alves Oliveira, Tiago
    Department of Hydraulic, Maritime and Environmental Engineering, Universitat Politècnica de Catalunya
    Theses

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  • Policy Oriented Marine Environmental Research in Southern Europe

     Sanchez-arcilla Conejo, Agustin
    Competitive project

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