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Reyns, J.A.H. (author), McCall, Robert (author), Ranasinghe, Roshanka (author), van Dongeren, Ap (author), Roelvink, D. (author)An unstructured hydrodynamic model is presented that is able to simulate 2D nearshore hydrodynamics on the wave group scale. A non-stationary wave driver with directional spreading, with physics similar to XBeach (Roelvink et al., 2009) is linked to an improved and extended version of the existing unstructured flow solver Delft3D–FM (Kernkamp...journal article 2023
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Ghanavati, Mandana (author), Young, Ian (author), Kirezci, Ebru (author), Ranasinghe, Roshanka (author), Duong, Trang Minh (author), Luijendijk, Arjen (author)A common inference in research studies of observed and projected changes in global ocean wave height and storm surge, is that such changes are potentially important for long-term coastal management. Despite numerous studies of the impacts of anthropogenic climate change on trends in global wind and waves, a clear link to impacts on sandy...journal article 2023
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Ngo, Hieu (author), Bomers, Anouk (author), Augustijn, Denie C.M. (author), Ranasinghe, Roshanka (author), Filatova, T. (author), van der Meulen, Bas (author), Herget, Jürgen (author), Hulscher, Suzanne J.M.H. (author)Reconstructions of the most severe historic flood events contribute to improved quantification of design discharges corresponding to large return periods. Reducing the uncertainty of design discharges has a great significance in constructing proper flood defences to protect the hinterland from future flooding. However, reconstructions of the...journal article 2023
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- Ngo, Hieu (author), Bomers, Anouk (author), Augustijn, Dennie CM. (author), Ranasinghe, Roshanka (author), Filatova, T. (author), Hulscher, Suzanne J.M.H. (author) conference paper 2022
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Vousdoukas, Michalis I. (author), Clarke, Joanne (author), Ranasinghe, Roshanka (author), Reimann, Lena (author), Khalaf, Nadia (author), Duong, M.T. (author), Ouweneel, Birgitt (author), Sabour, Salma (author), Iles, Carley E. (author)The African coast contains heritage sites of ‘Outstanding Universal Value’ that face increasing risk from anthropogenic climate change. Here, we generated a database of 213 natural and 71 cultural African heritage sites to assess exposure to coastal flooding and erosion under moderate (RCP 4.5) and high (RCP 8.5) greenhouse gas emission...journal article 2022
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Luijendijk, Arjen (author), Kras, Etiënne (author), Dagalaki, Vasiliki (author), Morelissen, Robin (author), Hoteit, Ibrahim (author), Ranasinghe, Roshanka (author)The Saudi Arabian tourism sector is growing, and its economy has flourished over the last decades. This has resulted in numerous coastal developments close to large economic centers, while many more are proposed or planned. The coastal developments have influenced the behavior of the shoreline in the past. Here we undertake a national...journal article 2022
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Ngo, Q.H. (author), Ranasinghe, Roshanka (author), Zevenbergen, C. (author), Kirezci, Ebru (author), Maheng, M.D. (author), Radhakrishnan, Mohanasundar (author), Pathirana, Assela (author)Risk-informed flood risk management requires a comprehensive and quantitative risk assessment, which often demands multiple (thousands of) river and flood model simulations. Performing such a large number of model simulations is a challenge, especially for large, complex river systems (e.g., Mekong) due to the associated computational and...journal article 2022
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Diaz-Loaiza, Andres (author), Bricker, J.D. (author), Meynadier, Rémi (author), Trang, Duong Minh (author), Ranasinghe, Roshanka (author), Jonkman, Sebastiaan N. (author)The Delft3D hydrodynamic and wave model is used to hindcast the storm surge and waves that impacted La Rochelle, France, and the surrounding area (Aytré, Châtelaillon-Plage, Yves, Fouras, and Île de Ré) during storm Xynthia. These models are validated against tide and wave measurements. The models then estimate the footprint of flow depth, speed...journal article 2022
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Athanasiou, Panagiotis (author), Van Dongeren, Ap (author), Giardino, Alessio (author), Vousdoukas, Michalis (author), Antolínez, José A. Á. (author), Ranasinghe, Roshanka (author)Sandy beaches and dune systems have high recreational and ecological value, and they offer protection against flooding during storms. At the same time, these systems are very vulnerable to storm impacts. Process-based numerical models are presently used to assess the morphological changes of dune and beach systems during storms. However, such...journal article 2022
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Ngo, Q.H. (author), Radhakrishnan, Mohanasundar (author), Ranasinghe, Roshanka (author), Pathirana, Assela (author), Zevenbergen, C. (author)Flood risk reduction strategies play an important role in flood risk management (FRM) and these strategies are being co-designed with the engagement of the stakeholder through multiple consultations and co-designing sessions. Effective participation of stakeholders in interactive work sessions requires fast and accurate modeling systems with...journal article 2021
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Athanasiou, Panagiotis (author), Van Dongeren, Ap (author), Giardino, Alessio (author), Vousdoukas, Michalis (author), Antolínez, José A. Á. (author), Ranasinghe, Roshanka (author)Dune erosion driven by extreme marine storms can damage local infrastructure or ecosystems and affect the long-term flood safety of the hinterland. These storms typically affect long stretches (∼100 km) of sandy coastlines with variable topo-bathymetries. The large spatial scale makes it computationally challenging for process-based...journal article 2021
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Verschuur, Jasper (author), Le Bars, Dewi (author), Katsman, C.A. (author), de Vries, S. (author), Ranasinghe, Roshanka (author), Drijfhout, Sybren S. (author), Aarninkhof, S.G.J. (author)Sea-level rise (SLR) can amplify the episodic erosion from storms and drive chronic erosion on sandy shorelines, threatening many coastal communities. One of the major uncertainties in SLR projections is the potential rapid disintegration of large fractions of the Antarctic ice sheet (AIS). Quantifying this uncertainty is essential to support...journal article 2020
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Vousdoukas, Michalis I. (author), Ranasinghe, Roshanka (author), Mentaschi, Lorenzo (author), Plomaritis, Theocharis A. (author), Athanasiou, Panagiotis (author), Luijendijk, Arjen (author), Feyen, Luc (author)Sandy beaches occupy more than one-third of the global coastline1 and have high socioeconomic value related to recreation, tourism and ecosystem services2. Beaches are the interface between land and ocean, providing coastal protection from marine storms and cyclones3. However the presence of sandy beaches cannot be taken for granted, as they are...journal article 2020
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Morphodynamic acceleration techniques for multi-timescale predictions of complex sandy interventionsLuijendijk, Arjen (author), de Schipper, M.A. (author), Ranasinghe, Roshanka (author)Thirty one percent (31%) of the world's coastline consists of sandy beaches and dunes that form a natural defense protecting the hinterland from flooding. A common measure to mitigate erosion along sandy beaches is the implementation of sand nourishments. The design and acceptance of such a mitigating measure require information on the expected...journal article 2019
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Luijendijk, Arjen (author), Hagenaars, Gerben (author), Ranasinghe, Roshanka (author), Baart, F. (author), Donchyts, Gennadii (author), Aarninkhof, S.G.J. (author)A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.journal article 2018
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- Ranasinghe, Roshanka (author), Jongejan, R.B. (author) contribution to periodical 2018
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Athanasiou, Panagiotis (author), de Boer, W.P. (author), Yoo, Jeseon (author), Ranasinghe, Roshanka (author), Reniers, A.J.H.M. (author)Understanding long-term sandbar dynamics can be crucial for informed coastal zone management, but is often hampered by data availability. To increase the number of sandbar observations available from bathymetric surveys, this study proposes and evaluates a method to manually extract the sandbar location using freely available satellite imagery...journal article 2018
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Ngo, Q.H. (author), Pathirana, Assela (author), Zevenbergen, C. (author), Ranasinghe, Roshanka (author)Probabilistic flood forecasting requires flood models that are simple and fast. Many of the modelling applications in the literature tend to be complex and slow, making them unsuitable for probabilistic applications which require thousands of individual simulations. This article focusses on the development of such a modelling approach to...journal article 2018
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Luijendijk, Arjen (author), Hagenaars, G.S. (author), Ranasinghe, Roshanka (author), Baart, F. (author), Donchyts, G. (author), Aarninkhof, S.G.J. (author)Coastal zones constitute one of the most heavily populated and developed land zones in the world. Despite the utility and economic benefits that coasts provide, there is no reliable global-scale assessment of historical shoreline change trends. Here, via the use of freely available optical satellite images captured since 1984, in conjunction...journal article 2018
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Athanasiou, Panagiotis (author), de Boer, W.P. (author), Tonnon, Pieter Koen (author), Yoo, Jeseon (author), de Schipper, M.A. (author), de Vries, S. (author), Ranasinghe, Roshanka (author), Reniers, A.J.H.M. (author)Nearshore sandbar patterns can affect the hydrodynamics and, as a result, the beach morphodynamics in the nearshore zone. Hence, spatial and temporal variability in the sandbars can influence beach accretion and erosion. Understanding the variability of the sandbar system can therefore be crucial for informed coastal zone management. So far, the...journal article 2018