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Ranasinghe, R. (author), Stive, M.J.F. (author)
journal article 2009
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Ranasinghe, R.W.M.R.J.B. (author), Swinkels, C. (author), Luijendijk, A.P. (author), Bosboom, J. (author), Roelvink, D. (author), Stive, M.J.F. (author), Walstra, D.J.R. (author)
The Morphological Acceleration Factor (MORFAC) approach for morphodynamic upscaling enables the simulation of long term coastal evolution. However the general validity of the MORFAC concept for coastal applications has not yet been comprehensively investigated. Furthermore, a robust and objective method for the a priori determination of the...
conference paper 2010
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De Vries, S. (author), De Schipper, M.A. (author), Ranasinghe, R.W.M.R.J.B. (author), Stive, M.J.F. (author)
The coastal system consists of a sub-aqueous and a sub-aerial zone which can be separated by a border. At this border sediment exchange takes place from one zone to the other. This paper hypothesizes that conditions and therefore sediment exchange at this border are dependent on active profile characteristics. To analyze morphological...
conference paper 2010
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Stive, M.J.F. (author), Ji, L. (author), Brouwer, R.L. (author), Van de Kreeke, J. (author), Ranasinghe, R.W.M.R.J.B. (author)
The well-known empirical relationship between the equilibrium cross-sectional area of tidal inlet entrances (A) and the tidal prism (P), first developed by O’Brien (1931), has been extensively reviewed. Our theoretical investigations indicate that a unique A-P relationship should only be expected for clusters of inlets that are phenomenological...
conference paper 2010
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Jiang, A.W. (author), Hughes, M. (author), Cowell, P. (author), Gordon, A. (author), Savioli, J.C. (author), Ranasinghe, R.W.M.R.J.B. (author)
The hydrodynamics and sediment transport in the swash zone is currently outside the domain of coastal-area models, which is a significant limitation in obtaining littoral sediment-transport estimates, especially on steep reflective beaches where the waves practically break on the beachface. In this study, an existing process-based coastal model ...
conference paper 2010
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Narayan, S. (author), Suzuki, T. (author), Stive, M.J.F. (author), Verhagen, H.J. (author), Ursem, W.N.J. (author), Ranasinghe, R. (author)
A study of the effectiveness of mangroves in attenuating cyclone- induced waves was done using the SWAN 40.81 numerical model. Hydraulic parameters during extreme events and local mangrove vegetation parameters were estimated for the Kanika Sands mangrove island near the upcoming Dhamra Port in Orissa, India. Simplified generic analyses were...
conference paper 2010
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De Schipper, M.A. (author), Ranasinghe, R.W.M.R.J.B. (author), Reniers, A.J.H.M. (author), Stive, M.J.F. (author)
Nearshore rhythmicity is often initiated in the period just after a storm where the subtidal bar is turned alongshore uniform. The initiation time as well as the length scales of the created rhythmicity varies from one storm period to another. Here we show that the post-storm wave conditions are related to the initiation of the morphological...
conference paper 2010
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Ranasinghe, R. (author), Callaghan, D. (author), Stive, M.J.F. (author)
Accelerated sea level rise (SLR) in the twenty-first century will result in unprecedented coastal recession, threatening billions of dollars worth of coastal developments and infrastructure. Therefore, we cannot continue to dep nd on the highly uncertain coastal recession estimates obtained via the simple, deterministic method (Bruun rule) that...
journal article 2011
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Jongejan, R.B. (author), Ranasinghe, R.W.M.R.J.B. (author), Vrijling, J.K. (author)
Economic and population growth have led to an unprecedented increase in the value at risk in coastal zones over the last century. To avoid excessive future losses, particularly in the light of projected climate change impacts, coastal zone managers have various instruments at their disposal. These primarily concern land-use planning ...
conference paper 2011
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De Vries, S. (author), De Schipper, M.A. (author), Ranasinghe, R.W.M.R.J.B. (author), Stive, M.J.F. (author)
The coastal system consists of a sub-aqueous and a sub-aerial zone which can be separated by a border. At this border sediment exchange takes place from one zone to the other. This paper hypothesizes that conditions and therefore sediment exchange at this border are dependent on active profile characteristics. To analyze morphological...
conference paper 2011
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Dastgheib, A. (author), Rajabalinejad, M.R. (author), Ranasinghe, R. (author), Roelvink, D. (author)
This paper demonstrates the sensitivity of morphological process-based models to the chronology of input wave conditions. In this research the effect of an emerged offshore breakwater on the morphology of the beach is investigated. A 30 day long morphological simulation with real time history of the wave (brute force - base case) is compared...
conference paper 2012
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Geldenhuys, M.A. (author), Jonkman, S.N. (author), Mather, A.A. (author), Ranasinghe, R.W.M.R.J.B. (author), Stive, M.J.F. (author), Van Ledden, M. (author)
Recent research done the IPCC (2007) working groups and other organizations has sparked global concern over the possible impacts of climate change and corresponding sea level rise (SLR) upon coastal communities. In reaction studies were done (for example by Nicholls et al., 2008) to assess the vulnerability of coastal regions and get an...
conference paper 2012
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Ranasinghe, R. (author), Jongejan, R.B. (author), Callaghan, D. (author), Vrijling, J.K. (author)
Current methods used to determine Coastal setback lines have several limitations. Furthermore, the historical practice of defining setback lines based on a single deterministic estimate is also proving inadequate with the emergence of risk management style coastal planning frameworks which require probabilistic estimates of coastal recession....
conference paper 2012
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Duong, T. (author), Ranasinghe, R. (author), Luijendijk, A. (author), Dastgheib, A. (author), Roelvink, D. (author)
Tidal inlets are of great societal importance as they are often associated with ports and harbours, industry, tourism, recreation and prime waterfront real estate. Their behaviour is governed by the delicate balance of oceanic processes (tides, waves and mean sea level), and fluvial/estuarine processes (riverflow and heat fluxes), all of which...
conference paper 2012
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Dissanayake Mudiyanselage, P.K.D. (author), Ranasinghe, R.W.M.R.J.B. (author), Roelvink, J.A. (author)
journal article 2012
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De Vries, S. (author), Southgate, H.N. (author), Kanning, W. (author), Ranasinghe, R.W.M.R.J.B. (author)
conference paper 2012
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Mil-Homens, J.P. (author), Ranasinghe, R.W.M.R.J.B. (author), Van Thiel de Vries, J.S.M. (author), Stive, M.J.F. (author)
Longshore sediment transport (LST) is one of the main drivers of beach morphology. Bulk LST formulas are routinely used in coastal management/engineering studies to assess LST rates and gradients. Over 50 years of research has resulted in several bulk LST formulas that have been tested with varying levels of rigor. In this study, the predictive...
conference paper 2012
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Ranasinghe, R.W.M.R.J.B. (author), Holman, R. (author), De Schipper, M.A. (author), Lippmann, T. (author), Wehof, J. (author), Duong, T.M. (author), Roelvink, D. (author), Stive, M.J.F. (author)
Time scales of post-storm nearshore morphological recovery and physical processes governing these time scales are poorly understood at present. The ability to predict nearshore morphological recovery time scales based on pre-, during- or post-resetting storm conditions is an essential requirement for building and validating scale aggregated...
conference paper 2012
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Wainwright, D. (author), Callaghan, D. (author), Jongejan, R.B. (author), Ranasinghe, R. (author), Cowell, P. (author)
It is well recognised that sea level change over the coming century will have an extraordinary economic impact on coastal communities. To overcome the uncertainty that still surrounds the mechanics of shoreline recession and stochastic forcing, landuse planning and management decisions will require a robust and quantitative risk-based approach....
conference paper 2012
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De Schipper, M.A. (author), Reniers, A. (author), MacMahan, J. (author), Ranasinghe, R.W.M.R.J.B. (author)
Field observations and numerical model simulations are examined to investigate the magnitude of vortical very low frequency (VLF) velocity fluctuations (i.e. large scale surfzone eddies) under different offshore wave forcing. Observations of vortical VLF motions under shore -normal wave incidence at Duck, NC, USA are re-analyzed and compared...
conference paper 2012
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