scholarly journals Revisiting the morphological method in two‐dimensions to quantify bed‐material transport in braided rivers

2019 ◽  
Vol 44 (11) ◽  
pp. 2251-2267 ◽  
Author(s):  
Gilles Antoniazza ◽  
Maarten Bakker ◽  
Stuart N. Lane
Keyword(s):  
Two Dimensions ◽  
Material Transport ◽  
Morphological Method ◽  
Braided Rivers ◽  
Bed Material

Inference of sediment transport pathways in a gully system using the morphological method

2020 ◽  
Author(s):  
Wen Dai ◽  
Stuart N. Lane ◽  
Guoan Tang
Keyword(s):  
Sediment Transport ◽  
Morphological Changes ◽  
Two Dimensions ◽  
Gully Erosion ◽  
Material Transport ◽  
Transport Pathways ◽  
Morphological Method ◽  
Multi Temporal ◽  
Total Transport ◽  
Topographic Attributes

<p>Gully erosion seriously threatens farmland and causes soil loss. Inferring sediment transport paths in a gully system is important for understanding the mechanisms of gully erosion. The morphological method successfully applied in estimating bed-material transport in both one dimension and two-dimensions in rivers, for some decades, has yet to be applied to gully erosion. Here, we infer sediment transport paths in a gully system using the morphological method. Two catchments in the Loess Plateau of China were selected as study areas. Multi-temporal high-resolution Digital Elevation Models (DEMs) were acquired using structure-from-motion multiview-stereo (SfM-MVS) photogrammetry for determining morphological changes. Then, both 1D sediment transport and 2D sediment transport paths were calculated based on morphological changes and topographic attributes. The results showed that the use of 1D treatment leads to substantial local errors in transport rate estimates, to a degree related to the number of branch gullies. The 2D application showed that a large proportion of the total transport was actually concentrated into one main channel in steep areas, the proportion of transport in branches is substantial in lower relief areas.</p>

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

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.

Bed material transport in the Virgin River, Utah

2000 ◽  
Vol 36 (2) ◽  
pp. 585-596 ◽  
Author(s):  
E. D. Andrews
Keyword(s):  
Material Transport ◽  
Virgin River ◽  
Bed Material

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.

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 A watershed scale numerical model of the impact of land use change on bed material transport in suburban Maryland, USA

2007 ◽  
Vol 43 (7) ◽  
Author(s):  
Mikolaj Lewicki ◽  
James E. Pizzuto ◽  
Glenn E. Moglen ◽  
Nicholas E. Allmendinger
Keyword(s):  
Land Use ◽  
Numerical Model ◽  
Land Use Change ◽  
Watershed Scale ◽  
Material Transport ◽  
Bed Material ◽  
The Impact

Interrelationships between bed morphology and bed-material transport for a small, gravel-bed channel*

Sedimentology ◽  
1976 ◽  
Vol 23 (1) ◽  
pp. 67-85 ◽  
Author(s):  
J. B. LARONNE ◽  
M. A. CARSON
Keyword(s):  
Material Transport ◽  
Gravel Bed ◽  
Bed Morphology ◽  
Bed Material
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