Engineering Activities Influencing Historical Sediment Transport Pathwaysat the Columbia River Mouth, WA/OR

2007 ◽  
Author(s):  
Mark R. Byrnes ◽  
Sarah F. Griffee ◽  
Hans R. Moritz
Keyword(s):  
Sediment Transport ◽  
River Mouth ◽  
Columbia River

Mapping Physical Characteristics of the Columbia River Mouth Using Transmittered Diving Waterbirds

2013 ◽  
Author(s):  
Daniel D. Roby ◽  
Donald E. Lyons ◽  
Adam Peck-Richardson ◽  
James A. Lerczak
Keyword(s):  
River Mouth ◽  
Columbia River ◽  
Physical Characteristics

Field and Numerical Study of the Columbia River Mouth

2013 ◽  
Author(s):  
Guy Gelfenbaum ◽  
Jamie MacMahan ◽  
Ad Reniers
Keyword(s):  
Numerical Study ◽  
River Mouth ◽  
Columbia River

scholarly journals Observation of Flood-driven Sediment Transport and Deposition Off a River Mouth

2015 ◽  
Vol 116 ◽  
pp. 1050-1056 ◽  
Author(s):  
Shin-ichi Aoki ◽  
Shigeru Kato ◽  
Takumi Okabe
Keyword(s):  
Sediment Transport ◽  
River Mouth

scholarly journals FORECASTING THE WAVE-CURRENT INTERACTIONS AT THE MOUTH OF THE COLUMBIA RIVER, OR, USA

2012 ◽  
Vol 1 (33) ◽  
pp. 53 ◽  
Author(s):  
Sarah Kassem ◽  
H. Tuba Ozkan-Haller
Keyword(s):  
Pacific Northwest ◽  
Mean Squared Error ◽  
River Mouth ◽  
Columbia River ◽  
Tidal Currents ◽  
General Effect ◽  
The Pacific ◽  
Wave Forecast ◽  
Channel Wave ◽  
Wave Heights

An operational wave forecast of the area near the mouth of the Columbia River is presented. This region is known for its large waves and strong tidal currents. The forecast is forced with full directional spectra obtained from a refined WaveWatchIII forecast of the Pacific Northwest, and tidal current inputs are obtained from an estuarine circulation forecast of the Columbia River. The forecast has been operational since August 2011 providing short-term predictive wave information at the mouth of the Columbia River. Results from a 6-month period are promising, with a normalized root-mean-squared error (NRMSE) of 16% at the location of an inshore buoy, which is located outside the zone of tidal influence in 25 m water depth. Near the river mouth and in the channel, wave heights are heavily dominated by the tidal currents which significantly increase wave heights on ebb tides. Hindcast results shows that the model is able to predict the general effect of the tidal currents with a NRMSE of 30% in wave heights at the river mouth. Despite some of the model limitations, it still provides valuable information to navigators and bar pilots since it includes the effects of the tidal currents.

scholarly journals MODELING SEDIMENT TRANSPORT IN THE YELLOW RIVER MOUTH

2011 ◽  
Vol 1 (32) ◽  
pp. 13
Author(s):  
Haibo Zong ◽  
Pingxing Ding ◽  
Fengyan Shi
Keyword(s):  
Sediment Transport ◽  
Yellow River ◽  
Sediment Resuspension ◽  
River Mouth ◽  
Sediment Concentration ◽  
The Yellow River ◽  
Numerical Studies ◽  
Wave Effects ◽  
Coastal Sediment Transport ◽  
Yellow River Mouth

Yellow River is famous for its high sediment concentration, which carries a huge amount of sediment into Bohai Sea during the flood season. In the mouth of Yellow River, the suspended sediment concentration (here after: SSC) are relatively high and the average depth is generally shallow. Recent studies indicated that in the shallow and micro-tide area, wave usually is a primary mechanism for bottom sediment resuspension. Most numerical studies of sediment transport in the Yellow River mouth didn't include the wave effects. To analyze the sediment transport in the Yellow River mouth with wave effect, a Coastal Sediment Transport Modeling System (CSTMS) was applied in this study.

scholarly journals Sand Bypassing Methodology For Sustainable River Mouth Opening

2019 ◽  
Vol 8 (2S11) ◽  
pp. 2280-2284
Keyword(s):  
Sediment Transport ◽  
Tamil Nadu ◽  
Mouth Opening ◽  
River Mouth ◽  
The Other ◽  
Natural Sediment ◽  
Water Level Rise ◽  
Model Study ◽  
River Training ◽  
The Impact

River inlets along the Tamil Nadu coast remain mostly closed due to negligible fresh water flow and also due to various structures constructed near to the river inlet obstructing natural sediment transport. Excessive development of the sand spit also causes serious problems such as water level rise during floods and difficulty in navigation through river mouth. To reduce the impact of coastal area flooding and easy navigation it is necessary to keep the river mouth open. River training walls (RTW) are generally constructed to keep the river mouth open. Depending upon the sediment transport direction, sediments get deposited on one side of the RTW, while depleting the sediments from the other side. To prevent the sediment deposit from spilling over to river mouth, it is ideal to bypass the sand to the other side of the river mouth. This study analyses the methodologies for sand bypassing. A numerical model study has been carried out using DHI LITPACK to evaluate the sedimentation. The procedure of sand bypassing using pumps and pipe lines are discussed. Volume of sand bypassed, pump capacity, the number of Booster pumps to maintain critical velocity etc. can be determined based on the procedure discussed

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