Searched for: subject:"process%5C+based%5C+modeling"
(1 - 18 of 18)
document
Cozzoli, Francesco (author), Gjoni, Vojsava (author), Del Pasqua, Michela (author), Hu, Zhan (author), Ysebaert, Tom (author), Herman, P.M.J. (author), Bouma, T. (author)
Macrozoobenthos may affect sediment stability and erodibility via their bioturbating activities, thereby impacting both the short- and long-term development of coastal morphology. Process-based models accounting for the effect of bioturbation are needed for the modelling of erosion dynamics. With this work, we explore whether the fundamental...
journal article 2019
document
de Queiroz, Bruna (author), Scheel, F. (author), Caires, Sofia (author), Walstra, D.J.R. (author), Olij, Derrick (author), Yoo, Jeseon (author), Reniers, A.J.H.M. (author), de Boer, W.P. (author)
In process-based numerical models, reducing the amount of input parameters, known as input reduction (IR), is often required to reduce the computational effort of these models and to enable long-term, ensemble predictions. Currently, a comprehensive performance assessment of IR-methods is lacking, which hampers guidance on selecting suitable...
journal article 2019
document
Luan, Hualong (author), Ding, P (author), Wang, Z.B. (author), Yang, S.L. (author), Lu, Jin You (author)
Morphodynamics of world's river deltas are increasingly affected by human activities, which are of great ecological, economic and social implications. However, impacts of human interventions in deltaic regions are insufficiently<br/>understood, especially superimposed upon diminishing sediment supplies. This study uses the heavily interfered...
journal article 2018
document
Tonnon, Pieter Koen (author), Huisman, B.J.A. (author), Stam, G. N. (author), van Rijn, L. C. (author)
Mega-nourishments, aiming at providing long-term coastal safety, nature qualities and recreational space, have been applied recently at the Holland coast and are considered at various other places in the world. Methods to quickly evaluate the potential and lifetime of these coastal mega nourishments are therefore very much desired, which is...
journal article 2018
document
van der Vegt, H. (author), Storms, J.E.A. (author), Walstra, D.J.R. (author), Howes, N.C. (author)
Abstract Understanding the processes and conditions at the time of deposition is key to the development of robust geological models which adequately approximate the heterogeneous delta morphology and stratigraphy they represent. We show how the mechanism of sediment transport (the proportion of the sediment supply transported as bed load vs....
journal article 2016
document
Walstra, D.J.R. (author)
Nearshore sandbars have a lifetime of many years, during which they exhibit cyclic, offshore directed behaviour with strong alongshore coherence. A bar is generated near the shoreline and grows in height and width while migrating offshore, before finally decaying at the seaward limit of the surf zone. It may take 10 to 15 years for a bar to...
doctoral thesis 2016
document
Walstra, D.J.R. (author), Wesselman, Daan (author), van der Deyl, Eveline (author), Ruessink, BG (author)
Inter-annual bar dynamics may vary considerably across sites with very similar environmental settings. In particular, the variability of the bar cycle return period (Tr) may differ by a factor of 3 to 4. To date, data studies are only partially successful in explaining differences in Tr, establishing at best weak correlations to local...
journal article 2016
document
Guo, L. (author), Van der Wegen, M. (author), Roelvink, J.A. (author), He, Q. (author)
Numerous research efforts have been devoted to understanding estuarine morphodynamics under tidal forcing. However, the impact of river discharge on estuarine morphodynamics is insufficiently examined. Inspired by the Yangtze Estuary, this work explores the morphodynamic impact of river discharge in a 560 km long tidal basin based on a 1-D model...
journal article 2014
document
Walstra, D.J.R. (author), Ruessink, G. (author), Hoekstra, R. (author), Tonnon, P.K. (author)
Input reduction is imperative to long-term (> years) morphodynamic simulations to avoid excessive computation times. Here, we discuss the input-reduction framework for wave-dominated coastal settings introduced by Walstra et al. (2013). The framework comprised 4 steps, viz. (1) the selection of the duration of the original (full) time series of...
conference paper 2013
document
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. However, there is still great uncertainty in LST estimation with these bulk formulas. This uncertainty may have two sources: 1) experimental errors in...
conference paper 2013
document
Blossier, B. (author), Briere, C. (author), Roelvink, J.A. (author), Walstra, D.J.R. (author)
Sand beach profiles can exhibit nearshore sandbars with complex 3D patterns. Under energetic conditions, these patterns disappear and the bars get to a certain extent alongshore uniform. This phenomenon is called a reset. The existing literature mainly concerns the development of the bar patterns (3D) or the cross-shore migration of sandbars (2D...
conference paper 2012
document
Dastgheib, A. (author)
The morphology of tidal basins includes a wide range of features developing along different spatial and temporal scales. Examples are shoals, channels, banks, dunes and ripples. Coastal engineers use their engineering tools to answer questions on the processes governing the short term (< decades) development of these morphological features....
doctoral thesis 2012
document
Muller, M.C. (author), Roelvink, D. (author), Luijendijk, A.P. (author), De Vries, S. (author), Van Thiel de Vries, J.S.M. (author)
In this paper, the aeolian transport model DUNE (Sauermann et al., 2001, Kroy et al., 2002) that describes important features and dynamics of typical desert dunes, is extended such that it can be applied in sandy coastal areas. Initial tests explore the limitations of the model in coastal areas after which adaptations are proposed and...
conference paper 2012
document
Tran, T.T. (author)
Situated in a monsoon-prone humid tropical region, Vietnam is affected by both oceanic and continental climates causing disasters to the country like riverine flooding and storm induced damage. The coastal districts of Vietnam have a population of about 18 million habitants, account for nearly one fourth of the total population of the country...
doctoral thesis 2011
document
Van der Wegen, M. (author), Dastgheib, A. (author), Jaffe, B.E. (author), Roelvink, J.A. (author)
Applications of process-based morphodynamic models are often constrained by limited availability of data on bed composition, which may have a considerable impact on the modeled morphodynamic development. One may even distinguish a period of “morphodynamic spin-up” in which the model generates the bed level according to some ill-defined initial...
journal article 2010
document
Smit, M. (author), Reniers, A. (author), Stive, M.J.F. (author)
Nearshore sandbars appear with various patterns which may change over time. From observations, these changes seem to be related to changes in hydrodynamic conditions, although observed length scales could not be related directly to occurring wave conditions. The current work investigated the role of both the concurrent and previous hydrodynamics...
conference paper 2010
document
Chu, A. (author), Wang, Z.B. (author), De Vriend, H.J. (author), Stive, M.J.F. (author)
A process-based model for the Yangtze Estuary is constructed to study the sediment transport in the estuary. The proposed model covers the entire tidal region of the estuary, the Hangzhou Bay and a large part of the adjacent sea. The dominant processes, fluvial and tidal, are included in the model. The calibration of the model against extensive...
conference paper 2010
document
Kai, C. (author)
Coastal zones which are known as the interface between continents and oceans are vital and important to human beings because a majority of the world's population live in such zones (Nelson, 2007). Coastal systems are among the most dynamic and energetic environments on earth and they are continuously changing because of the dynamic interaction...
report 2009
Searched for: subject:"process%5C+based%5C+modeling"
(1 - 18 of 18)