scholarly journals Channel change and bed-material transport in the Lower Chetco River, Oregon

2010 ◽  
Author(s):  
J. Rose Wallick ◽  
Scott W. Anderson ◽  
Charles Cannon ◽  
Jim E. O'Connor
Keyword(s):  
Material Transport ◽  
Channel Change ◽  
Bed Material

scholarly journals Channel change and bed-material transport in the Umpqua River basin, Oregon

2010 ◽  
Author(s):  
J. Rose Wallick ◽  
Jim E. O'Connor ◽  
Scott Anderson ◽  
Mackenzie K. Keith ◽  
Charles Cannon ◽  
...  
Keyword(s):  
River Basin ◽  
Material Transport ◽  
Channel Change ◽  
Bed Material

scholarly journals Channel change and bed-material transport in the Umpqua River basin, Oregon

2011 ◽  
Author(s):  
J. Rose Wallick ◽  
Jim E. O'Connor ◽  
Scott Anderson ◽  
Mackenzie K. Keith ◽  
Charles Cannon ◽  
...  
Keyword(s):  
River Basin ◽  
Material Transport ◽  
Channel Change ◽  
Bed Material

scholarly journals Channel change and bed-material transport in the Lower Chetco River, Oregon

2009 ◽  
Author(s):  
J. Rose Wallick ◽  
Scott W. Anderson ◽  
Charles Cannon ◽  
Jim E. O'Connor
Keyword(s):  
Material Transport ◽  
Channel Change ◽  
Bed Material

Test of selected bed-material load transport models: Nottawasaga River, Ontario

1994 ◽  
Vol 21 (5) ◽  
pp. 770-777 ◽  
Author(s):  
T. J. Chandler ◽  
R. A. Kostaschuk
Keyword(s):  
Sediment Transport ◽  
Engineering Application ◽  
Model Performance ◽  
Material Transport ◽  
Flow Strength ◽  
Transport Models ◽  
Data Scatter ◽  
Load Transport ◽  
Material Load ◽  
Bed Material

Predictions from 13 bed-material load sediment transport models are compared with 19 measurements of bed-material transport in Nottawasaga River, Ontario, using summary plots and geometric statistics. Model selection is based on recent engineering application and suitability for the flow and sediment conditions of the river. The models of Laursen (1958) and Yang (1979) perform best, followed by those of Ackers and White (1973). The models of Van Rijn (1984), Maddock (1976), Karim and Kennedy (1983), Brownlie (1981), and Yang (1973) have considerable data scatter. The models of Engelund and Hansen (1967) and Shen and Hung (1972) are the poorest predictors. Poor model performance is primarily due to overestimation of flow strength needed for particle entrainment and an excessively steep slope in the relations between flow strength and sediment transport. Key words: bed-material load transport models, test, Nottawasaga River.

Sand-wave immobility and the internal master bedding of sand-wave deposits

1980 ◽  
Vol 117 (5) ◽  
pp. 437-446 ◽  
Author(s):  
J. R. L. Allen
Keyword(s):  
Sand Wave ◽  
Periodic Part ◽  
Material Transport ◽  
Sand Waves ◽  
Bottom Boundary ◽  
Stratigraphic Record ◽  
Bottom Boundary Layers ◽  
Bed Material ◽  
Steady Velocity

SummarySand waves are such comparatively immobile transverse bedforms because they occur in tide-induced oscillatory bottom boundary layers typified by a steady velocity-component that generally is small compared to the amplitude of the periodic part. Consequently, the net bed-material transport rates, responsible for the long-term translation of the sand waves, typically are very small compared with the larger of the instantaneous rates. Sand waves should, therefore, be marked internally by series of erosional or, under restricted circumstances, non-depositional master bedding surfaces, each such surface, together with an associated comparatively thin sediment increment, being attributable to one sand-driving tide. Studies of modern sand waves, and investigations in the stratigraphic record, lend support to this conclusion. A further consequence of the regime of intense reworking under which sand waves exist is that their component grains should be in all ways more mature, other things being equal, than particles transported the same net distance by rivers.

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