Cross-shore sediment transport and the equilibrium morphology of mudflats under tidal currents

2003 ◽  
Vol 108 (C10) ◽  
Author(s):  
D. Pritchard
Keyword(s):  
Sediment Transport ◽  
Tidal Currents ◽  
Equilibrium Morphology

Non-cohesive and cohesive sediment transport due to tidal currents and sea waves: A case study

2019 ◽  
Vol 183 ◽  
pp. 87-102
Author(s):  
Pilar Díaz-Carrasco ◽  
Giovanna Vittori ◽  
Paolo Blondeaux ◽  
Miguel Ortega-Sánchez
Keyword(s):  
Sediment Transport ◽  
Cohesive Sediment ◽  
Tidal Currents ◽  
Sea Waves ◽  
Cohesive Sediment Transport

Sediment transport by tidal currents and implications for slope stability: Fraser River delta, British Columbia

1995 ◽  
Vol 32 (7) ◽  
pp. 852-859 ◽  
Author(s):  
R. A. Kostaschuk ◽  
J. L. Luternauer ◽  
J. V. Barrie ◽  
P. H. Leblond ◽  
L. Werth Von Deichmann
Keyword(s):  
Sediment Transport ◽  
Slope Failure ◽  
Tidal Currents ◽  
River Delta ◽  
Fraser River ◽  
Dune Field ◽  
Fraser River Delta ◽  
Material Load ◽  
And Migration ◽  
Bed Material

Tidal currents on the sandy, southern slope of Fraser River delta have generated dunes with heights of 0.5–3.5 m and lengths of 11–108 m. Dune geometry and migration measurements indicate net sediment transport to the northwest in the direction of flood tidal currents. Two current meters moored in the dune field showed greater frequencies of occurrence and higher mean current speeds in the flood direction compared with the ebb. Predictions from two bed-material load models indicate sediment transport is overwhelmingly dominated by flood currents. There is no obvious source of sand to replace sediment transported in the dune field, suggesting net erosion of the surface. A previous analysis of bathymetric data also shows recent erosion of the lower slope and overall slope steepening. These patterns of erosion could lead to slope failure and damage to coastal structures.

scholarly journals MODELLING WAVE-TIDE INTERACTIONS AT A WAVE FARM

2011 ◽  
Vol 1 (32) ◽  
pp. 34 ◽  
Author(s):  
Raul Gonzalez-Santamaria ◽  
Qingping Zou ◽  
Shunqi Pan ◽  
Roberto Padilla-Hernandez
Keyword(s):  
Sediment Transport ◽  
Wind Waves ◽  
Tidal Currents ◽  
Bottom Friction ◽  
Main Question ◽  
Tidal Elevation ◽  
Coastal Morphology ◽  
Energy Devices ◽  
Wave Farm ◽  
Modelling System

The Wave Hub project will create the world’s largest wave farm off the coast of Cornwall, Southwest England. This study is to investigate wave and tide interactions, in particular their effects on bottom friction and sediment transport at the wave-farm coast. This is an ambitious project research which includes the use of a very complex numerical modelling system. The main question to answer is how waves, tidal currents and winds affect the bottom friction at the Wave Hub site and the near-shore zone, as well as their impact on the sediment transport. Results show that tidal elevation and tidal currents have a significant effect on the wave height predictions, tidal forcing and wind waves have a significant effect on the bed shear-stress, relevant to sediment transport, waves via radiation stresses have an important effect on the long-shore and cross-shore velocity components, particularly during the spring tides, waves can impact on bottom boundary layer and the mixing in the water column. Interactions between waves and tides at the Wave Hub site is important when modelling coastal morphology influenced by wave energy devices, this open-source modelling system tool will help the study of physical impacts on the Wave Hub farm area.

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