Numerical Modeling of Sediment Transport and River Morphodynamics

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydraulics and Hydrodynamics".

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 2639

Special Issue Editors

Department of Hydraulic and Water Resources Engineering, Budapest University of Technology and Economics, Budapest 1111, Hungary
Interests: river engineering; hydrodynamics; sediment transport; numerical modeling; field measurements; ecohydraulics
Department of Civil and Environmental Engineering Faculty of Engineering, NTNU, 7491 Trondheim, Norway
Interests: numerical modelling; sediment transport; river engineering; incipient motion; plan form development; hydraulic structures; hydro power development; ecohydraulics
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Special Issue Information

Dear Colleagues,

The numerical modelling of sediment transport in fluvial environment is under constant development. The recent technological improvement in terms of computational speed made it possible to investigate highly resolved processes in time and space. The results are used to gain insights into processes which previously have not been possible to look at due to CPU constraints or the lack of suitable measurement technology. These processes comprise, for example, grain-grain interaction such as sorting and incipient potion, near bed flow characteristics under the full range of relative submergance, local scouring, clogging, geophysical flows, consolidation in the context of river engineering, ecohydraulics interaction with hydraulic structures and hydro power development. The current Special Issue reflects therefore on the recent developments in the field of numerical sediment transport modelling for engineers and geographers, both for basic and applied research cases. Furthermore, this issue will document the current state of the development and application of hydrodynamic models coupled to sediment transport in all three dimensions.

Dr. Sándor Baranya
Dr. Nils Ruther
Guest Editors

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Keywords

  • numerical modeling
  • sediment transport
  • river hydromorphology
  • river engineering
  • hydropower development
  • bedform dynamics
  • bed armouring
  • substrate composition

Published Papers (1 paper)

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Research

16 pages, 5415 KiB  
Article
Effect of Sediment Supply on Morphodynamics of Free Alternate Bars: Insights from Hydrograph Boundary Layer
by Huang Dai, Toshiki Iwasaki and Yasuyuki Shimizu
Water 2021, 13(23), 3437; https://0-doi-org.brum.beds.ac.uk/10.3390/w13233437 - 04 Dec 2021
Cited by 2 | Viewed by 1768
Abstract
Sediment supply plays an essential role in river morphology. However, the specific impact of sediment supply on river morphology is not apparent. According to the hydrograph boundary layer (HBL) concept, upstream riverbed changes caused by the imbalance between sediment supply and the capacity [...] Read more.
Sediment supply plays an essential role in river morphology. However, the specific impact of sediment supply on river morphology is not apparent. According to the hydrograph boundary layer (HBL) concept, upstream riverbed changes caused by the imbalance between sediment supply and the capacity can propagate only a limited length and have a negligible effect on the riverbed beyond such a short length. We performed a two-dimensional morphodynamic calculation to test the concept of HBL, which was proposed under a one-dimensional simulation, meaning that the concept of HBL is still valid for plane changes in river morphology. We employed an unsteady flow with equilibrium or constant sediment supply in a straight, modeled gravel-bedded channel with an unerodible bank to simulate alternate bar morphodynamics. The results show that regardless of the sediment supply condition, the alternate bar features formed downstream of the HBL are considerably similar. This suggests that sediment disturbance at the upstream end has a negligible effect on the mobile-bed dynamic processes, including alternate bar formation and development downstream of the HBL. Full article
(This article belongs to the Special Issue Numerical Modeling of Sediment Transport and River Morphodynamics)
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