Recent advances in basic and applied research in cohesive sediment transport in aquatic systems

2007 ◽  
Vol 34 (6) ◽  
pp. 731-743 ◽  
Author(s):  
Bommanna G Krishnappan
Keyword(s):  
Sediment Transport ◽  
Cohesive Sediment ◽  
Transport Processes ◽  
Fluid Mud ◽  
Transport Parameters ◽  
Flocculation Mechanism ◽  
Gravel Beds ◽  
Cohesive Sediment Transport ◽  
Deposition Processes ◽  
Basic And Applied Research

An overview of cohesive sediment transport processes is given in this paper, and a mass-balance equation that is commonly used to treat cohesive sediment transport is reviewed. The equation highlights transport parameters and processes that are important for modelling the transport of cohesive sediment. The flocculation mechanism that distinguishes cohesive sediment from its noncohesive counterpart is elaborated using a laboratory study that was carried out in a rotating circular flume using sediments from Hay River, Northwest Territories, Canada. A mathematical model of flocculation suitable for predicting flocculation of sediment in rotating circular flumes is reviewed. Other cohesive sediment transport processes such as erosion and deposition processes at the sediment-water interface, entrapment of fines in gravel beds, consolidation, fluid mud, and fluidization due to wave action are reviewed. Additional challenges and knowledge gaps that exist in the area of cohesive sediment transport are identified. Key words: cohesive sediment, flocculation, mathematical modelling of flocculation, rotating circular flume, erosion, deposition, fine sediment entrapment, fluid mud, consolidation, fluidization, waves.

scholarly journals Fundamental study on modeling of cohesive sediment transport with fluid mud layer

2011 ◽  
Vol 67 (2) ◽  
pp. I_461-I_465
Author(s):  
Yasuyuki NAKAGAWA ◽  
Kazuo NADAOKA ◽  
Hiroshi YAGI ◽  
Ryuich ARIJI ◽  
Haruo YONEYAMA ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Cohesive Sediment ◽  
Fluid Mud ◽  
Fundamental Study ◽  
Cohesive Sediment Transport

scholarly journals MODELING ESTUARIAL COHESIVE SEDIMENT TRANSPORT

1984 ◽  
Vol 1 (19) ◽  
pp. 199
Author(s):  
E.J. Hayter ◽  
A.J. Mehta
Keyword(s):  
Sediment Transport ◽  
Transport Model ◽  
Cohesive Sediment ◽  
Transport Processes ◽  
Weighted Residual Method ◽  
Dispersive Transport ◽  
Time Step ◽  
Advection Dispersion ◽  
Cohesive Sediment Transport ◽  
Suspended Sediment Concentrations

Cohesive sediment related problems in estuaries include shoaling in navigable waterways and water pollution. A two-dimensional, depth averaged, finite element cohesive sediment transport model, CSTM-H, has been developed and may be used to assist in predicting the fate of sorbed pollutants and the frequency and quantity of dredging required to maintain navigable depths. Algorithms which describe the transport processes of redispersion, resuspenslon, dispersive transport, settling, deposition, bed formation and bed consolidation are incorporated in CSTM-H. The Galerkin weighted residual method is used to solve the advection-dispersion equation with appropriate source/sink terms at each time step for the nodal suspended sediment concentrations. The model yields stable and converging solutions. Verification was carried out against a series of erosion-deposition experiments in the laboratory using kaolinite and a natural mud as sediment. A model application under prototype conditions is described.

Cohesive sediment transport processes

1993 ◽  
Vol 21 (1-3) ◽  
pp. 129-162 ◽  
Author(s):  
C. Teisson ◽  
M. Ockenden ◽  
P. Le Hir ◽  
C. Kranenburg ◽  
L. Hamm
Keyword(s):  
Sediment Transport ◽  
Cohesive Sediment ◽  
Transport Processes ◽  
Cohesive Sediment Transport

scholarly journals Cohesive Sediment Field Study : James River, Virginia

2021 ◽  
Author(s):  
S. Jarrell Smith ◽  
David W. Perkey ◽  
Kelsey A. Fall
Keyword(s):  
Sediment Transport ◽  
Settling Velocity ◽  
Cohesive Sediment ◽  
Sediment Management ◽  
Transport Processes ◽  
Transport Modeling ◽  
Army Corps ◽  
James River ◽  
Cohesive Sediment Transport ◽  
Modeling Study

Estuaries trap much of the fine sediment delivered to them by rivers. This phenomenon presents challenges to the US Army Corps of Engineers (USACE) navigation mission, which maintains navigable waterways for waterborne commerce through estuarine regions. The USACE Regional Sediment Management Program and the USACE Norfolk District are conducting a regional sediment transport modeling study to identify cost-effective sediment management schemes in the James River, a tributary estuary of Chesapeake Bay. A key element of the sediment transport modeling study is the definition of cohesive sediment transport processes, such as erosion and settling velocity. This report describes field-based measurements of cohesive sediment erosion and settling velocity conducted in November 2017. The team conducted erosion testing on 15 cores collected throughout the tidal system. Additionally, two anchor stations were occupied to measure tidal variations in vertical distributions of suspended sediment concentration, particle size, and settling velocity. Recommended cohesive sediment transport parameters were developed from the field measurements.

NUMERICAL SIMULATION OF CURRENT INDUCED COHESIVE SEDIMENT TRANSPORT IN MINAMATA BAY

2018 ◽  
Vol 74 (5) ◽  
pp. I_943-I_948
Author(s):  
Changlu ZHOU ◽  
Akihide TADA ◽  
Shinichiro YANO ◽  
Akito MATSUYAMA ◽  
Changping CHEN
Keyword(s):  
Numerical Simulation ◽  
Sediment Transport ◽  
Cohesive Sediment ◽  
Cohesive Sediment Transport ◽  
Minamata Bay
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