Searched for: subject:"sediment"
(1 - 20 of 448)

Pages

document
Baptist, Martin J. (author), Gerkema, T (author), van Prooijen, Bram (author), van Maren, D.S. (author), Colosimo, I. (author), Elschot, K. (author), de Groot, A. V. (author), Cleveringa, J. (author), van Eekelen, E. M.M. (author), More Authors (author)
We test an innovative approach to beneficially re-use dredged sediment to enhance salt marsh development. A Mud Motor is a dredged sediment disposal in the form of a semi-continuous source of mud in a shallow tidal channel allowing natural processes to disperse the sediment to nearby mudflats and salt marshes. We describe the various steps in...
journal article 2019
document
Maan, D.C. (author), van Prooijen, Bram (author), Wang, Zhengbing (author)
We use the results of a one-dimensional morphodynamic model and the basis of the “Lagrangian equilibrium state” (Maan et al., 2015, https://doi.org/10.1002/2014JF003311) to derive a quantitative relationship between the progradation speed of tidal flats and the suspended sediment concentration in their adjacent waters and show that the speed...
journal article 2019
document
Meirelles Nunes da Rocha, Saulo (author)
This thesis examines the effects of the stratified tidal flow on the morphodynamics of the Dutch inner shelf. The south portion of the Dutch inner shelf is strongly influenced by the Rhine River ROFI (Region Of Freshwater Influence), which is generated by the discharge from the Rhine River through the Rotterdam waterways. Under stratified...
doctoral thesis 2019
document
Guo, Leicheng (author), Wang, Zhengbing (author), Townend, Ian (author), He, Qing (author)
Tidal wave deformation and tidal asymmetry widely occur in tidal estuaries and lagoons. Tidal asymmetry has been intensively studied because of its controlling role on residual sediment transport and large‐scale morphological evolution. There are several methods available to characterize tidal asymmetry prompting the need for an overview of...
journal article 2019
document
de Vet, P.L.M. (author), Boersema, Matthijs (author), Bouma, T.J. (author), Nolte, A. J. (author), Schrijvershof, R. A. (author), Soissons, L. M. (author), Stronkhorst, J (author), van Zanten, E. (author), Ysebaert, Tom (author)
The Eastern Scheldt, a tidal basin in the southwest of The Netherlands, underwent large physical and ecological changes due to a system-wide human interference. The construction of a storm surge barrier at the seaward side and closure of the upstream branches in the 1980s resulted in intertidal flat erosion. This has far reaching consequences...
journal article 2019
document
Kumar, M. (author)
doctoral thesis 2018
document
Schielen, Ralph M.J. (author), Blom, A. (author)
We derive an idealized model of a gravel-sand river bifurcation and analyze its stability properties. The model requires nodal point relations that describe the ratio of the supply of gravel and sand to the two downstream branches. The model predicts changes in bed elevation and bed surface gravel content in the two bifurcates under...
journal article 2018
document
Flores, Raúl P. (author), Rijnsburger, S. (author), Meirelles Nunes da Rocha, Saulo (author), Horner-Devine, Alexander R. (author), Souza, Alejandro J. (author), Pietrzak, J.D. (author), Henriquez, M. (author), Reniers, A.J.H.M. (author)
Wave-supported gravity flows (WSGFs) generate rates of sediment flux far exceeding other cross-shelf transport processes, contributing disproportionately to shelf morphology and net cross-shelf fluxes of sediment in many regions worldwide. However, the conditions deemed necessary for the formation of WSGF limit them to a narrow set of shelf...
journal article 2018
document
Tene, M. (author), Stuparu, Dana E. (author), Kurowicka, D. (author), El Serafy, G.Y.H. (author)
This paper describes a novel sensitivity analysis method, able to handle dependency relationships between model parameters. The starting point is the popular Morris (1991) algorithm, which was initially devised under the assumption of parameter independence. This important limitation is tackled by allowing the user to incorporate dependency...
journal article 2018
document
Guo, Leicheng (author), Su, Ni (author), Zhu, C. (author), He, Qing (author)
Streamflow and sediment loads undergo remarkable changes in worldwide rivers in response to climatic changes and human interferences. Understanding their variability and the causes is of vital importance regarding river management. With respect to the Changjiang River (CJR), one of the largest river systems on earth, we provide a...
journal article 2018
document
Chavarrias Borras, V. (author), Stecca, G. (author), Blom, A. (author)
In this paper we analyze the Hirano active layer model used in mixed sediment river morphodynamics concerning its ill-posedness. Ill-posedness causes the solution to be unstable to short-wave perturbations. This implies that the solution presents spurious oscillations, the amplitude of which depends on the domain discretization. Ill-posedness...
journal article 2018
document
Snellen, M. (author), Gaida, T.C. (author), Koop, L. (author), Alevizos, Evangelos (author), Simons, D.G. (author)
Obtaining an overview of the spatial and temporal distribution of seabed sediments is of high interest for multiple research disciplines. Multibeam echosounders allow for the mapping of seabed sediments with high area coverage. In this paper, the repeatability of acoustic classification derived from multibeam echosounder backscatter is addressed...
journal article 2018
document
Roest, Lambertus W.M. (author)
The Sand Engine is an example of a feeder nourishment that is intended to nourish coastal systems. This strategy is based on placing sediments highly concentrated at one location, from which it is expected to spread alongshore over large distances on decadal timescales.

Here the morphological development of the Sand Engine mega feeder...
abstract 2018
document
Oliveira, Bruna R F (author), Smit, Martijn P J (author), Veld, Harry (author), van Paassen, L.A. (author), Rijnaarts, Huub H M (author), Grotenhuis, Tim C. (author)
Land subsidence in low-lying peatlands can be caused by shrinkage and organic matter oxidation. When these areas have networks of ditches and canals for drainage purposes, the sediments that accumulate in the waterways can be used to reverse the process of land subsidence. The objective of this study is to understand how dredged sediments can...
journal article 2018
document
Huisman, B.J.A. (author), Ruessink, B. G. (author), de Schipper, M.A. (author), Luijendijk, A.P. (author), Stive, M.J.F. (author)
) of the sea bed on the lower shoreface. The relevance of hydrodynamic conditions for the development of the heterogeneity...
journal article 2018
document
Zhao, Jie (author), Guo, Leicheng (author), He, Qing (author), Wang, Zhengbing (author), van Maren, D.S. (author), Wang, X. (author)
Examination of large scale, alluvial estuarine morphology and associated time evolution is of particular importance regarding management of channel navigability, ecosystem, etc. In this work, we analyze morphological evolution and changes of the channel-shoal system in the Changjiang Estuary, a river- and tide-controlled coastal plain estuary,...
journal article 2018
document
Vavourakis, Charlotte D. (author), Andrei, Adrian Stefan (author), Mehrshad, Maliheh (author), Ghai, Rohit (author), Sorokin, Dimitry Y. (author), Muyzer, Gerard (author)
Background: Hypersaline soda lakes are characterized by extreme high soluble carbonate alkalinity. Despite the high pH and salt content, highly diverse microbial communities are known to be present in soda lake brines but the microbiome of soda lake sediments received much less attention of microbiologists. Here, we performed metagenomic...
journal article 2018
document
Baar, A.W. (author), de Smit, Jaco (author), Uijttewaal, W.S.J. (author), Kleinhans, Maarten G. (author)
Large-scale morphology, in particular meander bend depth, bar dimensions, and bifurcation dynamics, are greatly affected by the deflection of sediment transport on transverse bed slopes due to gravity and by secondary flows. Overestimating the transverse bed slope effect in morphodynamic models leads to flattening of the morphology, while...
journal article 2018
document
Wang, Zhengbing (author), Elias, Edwin (author), van der Spek, A.J.F. (author), Lodder, Q.J. (author)
The Wadden Sea is a unique coastal wetland containing an uninterrupted stretch of tidal flats that span a distance of nearly 500 km along the North Sea coast from the Netherlands to Denmark. The development of this system is under pressure of climate change and especially the associated acceleration in sea-level rise (SLR). Sustainable...
journal article 2018
document
Chavarrias Borras, V. (author), Blom, A. (author), Orru, C. (author), Martín-Vide, Juan Pedro (author), Viparelli, Enrica (author)
Laboratory experiments were conducted on a sand-gravel Gilbert delta to gain insight on its dynamics under varying base level. Base level rise results in intensified aggradation over the topset, as well as a decrease in topset slope and topset surface coarsening, the signals of which migrate in an upstream direction. Preferential deposition...
journal article 2018
Searched for: subject:"sediment"
(1 - 20 of 448)

Pages