Now showing items 1-12 of 12

    • A model for grain-size sorting over tidal sand ridges 

      Walgreen, M; de Swart, Huib E.; Calvete Manrique, Daniel (2004-07)
      Article
      Restricted access - publisher's policy
      A model was developed and analyzed to quantify the effect of graded sediment on the formation of tidal sand ridges. Field data reveal coarse (fine) sediment at the crests (in the troughs), but often phase shifts between ...
    • Dynamics of shoreface-connected and inactive sand ridges on a shelf, Part 2: The role of sea level rise and associated changes in shelf geometry 

      Nnafie, Abdel; de Swart, Huib E.; Calvete Manrique, Daniel; Garnier, Roland Charles (2015-08)
      Article
      Open Access
      Many inner continental shelves are characterized by the presence of large rhythmic bedforms, such as shoreface-connected ridges and the more offshore located sand ridges, which have heights of several meters and are spaced ...
    • Effect of surface rollers on the formation crescentic bars 

      Calvete Manrique, Daniel; Ribas Prats, Francesca; de Swart, Huib E.; Falqués Serra, Albert (2011)
      Conference lecture
      Restricted access - publisher's policy
      The effect of surface rollers on the formation of crescentic bars/rip channel systems is examined with a morphodynamic model. A linear stability analysis is applied to find the fastest growing bottom patterns that develop ...
    • Emerging crescentic patterns in modelled double sandbar systems under normally incident waves 

      Coco, Giovanni; Calvete Manrique, Daniel; Ribas Prats, Francesca; de Swart, Huib E.; Falqués Serra, Albert (European Geosciences Union (EGU), 2020-05-06)
      Article
      Open Access
      Double sandbar systems often characterize the surf zone of wave-dominated beaches and display a variety of poorly explained spatial configurations. Here, we explore the morphodynamic stability of double-barred beaches using ...
    • Formation of shoreface-connected sand ridges: effects of rigid-lid approach, quasi-steady approach and wave-topography feedbacks 

      Nnafie, Abdel; de Swart, Huib E.; Garnier, Roland; Calvete Manrique, Daniel (2011)
      Conference lecture
      Restricted access - publisher's policy
      The initial- and long-term evolution of shoreface-connected sand ridges (sfcr) is investigated with a new nonlinear model (MORFO56) that employs finite difference methods, rather than spectral methods. MORFO56 uses ...
    • Long-term morphodynamics of a coupled shelf-shoreline system forced by waves and tides, a model approach 

      Nnafie, Abdel; de Swart, Huib E.; Falqués Serra, Albert; Calvete Manrique, Daniel (American Geophysical Union (AGU), 2021-12)
      Article
      Open Access
      Sand ridges, with length scales of several km, are prominent features of the seafloor landscape of many sandy continental shelves. Knowledge about the extent to which these ridges influence the large-scale (i.e., decadal ...
    • Modelling the formation of transverse sand bars: application to Duck beach, USA 

      Ribas Prats, Francesca; de Swart, Huib E.; Calvete Manrique, Daniel; Falqués Serra, Albert (2011)
      Conference report
      Open Access
      A morphodynamic model has been applied to explain the formation of transverse sand bars at Duck beach, USA. The model describes the feedback between waves, rollers, depth-averaged currents and bed evolution, so that ...
    • Non-linear response of shoreface-connected sand ridges 

      de Swart, Huib E.; Calvete Manrique, Daniel (2003-10)
      Article
      Restricted access - publisher's policy
      A non-linear morphodynamic model of a microtidal coastal shelf is used to study the response of shoreface-connected sand ridges and the net sand balance of the shelf to large-scale interventions. The model describes the ...
    • Nonlinear modelling of shoreface-connected ridges; impact of grain sorting and interventions 

      de Swart, Huib E.; Walgreen, M; Calvete Manrique, Daniel; Vis-Star, N C (2008-01)
      Article
      Restricted access - publisher's policy
      The evolution of shoreface-connected sand ridges on micro-tidal inner shelves and the variations in the mean grain size over these ridges are investigated with process-based models. A review of previous studies is presented, ...
    • On the physics behind coastal morphodynamic patterns 

      Ribas Prats, Francesca; Falqués Serra, Albert; de Swart, Huib E.; Dodd, Nicholas; Garnier, Roland Charles; Calvete Manrique, Daniel (2016)
      Conference report
      Open Access
    • Onshore sandbar migration in the surf zone: new insights into the wave-induced sediment transport mechanisms 

      Fernández Mora, María de los Ángeles; Calvete Manrique, Daniel; Falqués Serra, Albert; de Swart, Huib E. (2015-04-28)
      Article
      Open Access
      We present a novel process-based morphodynamic model, which includes transport processes due to both velocity and acceleration skewness and a new formulation for intrawave motions, that successfully simulates observations ...
    • Understanding coastal morphodynamic patterns from depth-averaged sediment concentration 

      Ribas Prats, Francesca; Falqués Serra, Albert; de Swart, Huib E.; Dodd, Nicholas; Garnier, Roland Charles; Calvete Manrique, Daniel (2015)
      Article
      Open Access
      This review highlights the important role of the depth-averaged sediment concentration (DASC) to understand the formation of a number of coastal morphodynamic features that have an alongshore rhythmic pattern: beach ...