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On bed particle diffusion in gravel bed flows under weak bed load transport
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| Zeitschriftentitel: | Water Resources Research |
|---|---|
| Personen und Körperschaften: | , , , |
| In: | Water Resources Research, 38, 2002, 6 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
American Geophysical Union (AGU)
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| Schlagwörter: |
| author_facet |
Nikora, Vladimir Habersack, Helmut Huber, Thomas McEwan, Ian Nikora, Vladimir Habersack, Helmut Huber, Thomas McEwan, Ian |
|---|---|
| author |
Nikora, Vladimir Habersack, Helmut Huber, Thomas McEwan, Ian |
| spellingShingle |
Nikora, Vladimir Habersack, Helmut Huber, Thomas McEwan, Ian Water Resources Research On bed particle diffusion in gravel bed flows under weak bed load transport Water Science and Technology |
| author_sort |
nikora, vladimir |
| spelling |
Nikora, Vladimir Habersack, Helmut Huber, Thomas McEwan, Ian 0043-1397 1944-7973 American Geophysical Union (AGU) Water Science and Technology http://dx.doi.org/10.1029/2001wr000513 <jats:p>We introduce a new conceptual model for longitudinal and transverse diffusion of moving bed particles under weak bed load transport. For both rolling/sliding and saltating modes the model suggests that the particle motion is diffusive and comprises at least three ranges of temporal and spatial scales with different diffusion regimes: (1) the local range (ballistic diffusion), (2) the intermediate range (normal or anomalous diffusion), and (3) the global range (subdiffusion). The local range corresponds to ballistic particle trajectories between two successive collisions with the static bed particles. The intermediate range corresponds to particle trajectories between two successive periods of rest. These trajectories consist of many local trajectories and may include tens or hundreds of collisions with the bed. The global range of scales corresponds to particle trajectories consisting of many intermediate trajectories, just as intermediate trajectories consist of many local trajectories. Our data from the Balmoral Canal (the intermediate range) and <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#wrcr9093-bib-0005"><jats:italic>Drake et al.</jats:italic>'s [1988]</jats:ext-link> data from the Duck Creek (the global range) provide strong support for this conceptual model and identify anomalous diffusion regimes for the intermediate range (superdiffusion) and the global range (subdiffusion).</jats:p> On bed particle diffusion in gravel bed flows under weak bed load transport Water Resources Research |
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| title |
On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_unstemmed |
On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_full |
On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_fullStr |
On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_full_unstemmed |
On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_short |
On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_sort |
on bed particle diffusion in gravel bed flows under weak bed load transport |
| topic |
Water Science and Technology |
| url |
http://dx.doi.org/10.1029/2001wr000513 |
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2002 |
| physical |
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| description |
<jats:p>We introduce a new conceptual model for longitudinal and transverse diffusion of moving bed particles under weak bed load transport. For both rolling/sliding and saltating modes the model suggests that the particle motion is diffusive and comprises at least three ranges of temporal and spatial scales with different diffusion regimes: (1) the local range (ballistic diffusion), (2) the intermediate range (normal or anomalous diffusion), and (3) the global range (subdiffusion). The local range corresponds to ballistic particle trajectories between two successive collisions with the static bed particles. The intermediate range corresponds to particle trajectories between two successive periods of rest. These trajectories consist of many local trajectories and may include tens or hundreds of collisions with the bed. The global range of scales corresponds to particle trajectories consisting of many intermediate trajectories, just as intermediate trajectories consist of many local trajectories. Our data from the Balmoral Canal (the intermediate range) and <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#wrcr9093-bib-0005"><jats:italic>Drake et al.</jats:italic>'s [1988]</jats:ext-link> data from the Duck Creek (the global range) provide strong support for this conceptual model and identify anomalous diffusion regimes for the intermediate range (superdiffusion) and the global range (subdiffusion).</jats:p> |
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| author | Nikora, Vladimir, Habersack, Helmut, Huber, Thomas, McEwan, Ian |
| author_facet | Nikora, Vladimir, Habersack, Helmut, Huber, Thomas, McEwan, Ian, Nikora, Vladimir, Habersack, Helmut, Huber, Thomas, McEwan, Ian |
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| description | <jats:p>We introduce a new conceptual model for longitudinal and transverse diffusion of moving bed particles under weak bed load transport. For both rolling/sliding and saltating modes the model suggests that the particle motion is diffusive and comprises at least three ranges of temporal and spatial scales with different diffusion regimes: (1) the local range (ballistic diffusion), (2) the intermediate range (normal or anomalous diffusion), and (3) the global range (subdiffusion). The local range corresponds to ballistic particle trajectories between two successive collisions with the static bed particles. The intermediate range corresponds to particle trajectories between two successive periods of rest. These trajectories consist of many local trajectories and may include tens or hundreds of collisions with the bed. The global range of scales corresponds to particle trajectories consisting of many intermediate trajectories, just as intermediate trajectories consist of many local trajectories. Our data from the Balmoral Canal (the intermediate range) and <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#wrcr9093-bib-0005"><jats:italic>Drake et al.</jats:italic>'s [1988]</jats:ext-link> data from the Duck Creek (the global range) provide strong support for this conceptual model and identify anomalous diffusion regimes for the intermediate range (superdiffusion) and the global range (subdiffusion).</jats:p> |
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| spelling | Nikora, Vladimir Habersack, Helmut Huber, Thomas McEwan, Ian 0043-1397 1944-7973 American Geophysical Union (AGU) Water Science and Technology http://dx.doi.org/10.1029/2001wr000513 <jats:p>We introduce a new conceptual model for longitudinal and transverse diffusion of moving bed particles under weak bed load transport. For both rolling/sliding and saltating modes the model suggests that the particle motion is diffusive and comprises at least three ranges of temporal and spatial scales with different diffusion regimes: (1) the local range (ballistic diffusion), (2) the intermediate range (normal or anomalous diffusion), and (3) the global range (subdiffusion). The local range corresponds to ballistic particle trajectories between two successive collisions with the static bed particles. The intermediate range corresponds to particle trajectories between two successive periods of rest. These trajectories consist of many local trajectories and may include tens or hundreds of collisions with the bed. The global range of scales corresponds to particle trajectories consisting of many intermediate trajectories, just as intermediate trajectories consist of many local trajectories. Our data from the Balmoral Canal (the intermediate range) and <jats:ext-link xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#wrcr9093-bib-0005"><jats:italic>Drake et al.</jats:italic>'s [1988]</jats:ext-link> data from the Duck Creek (the global range) provide strong support for this conceptual model and identify anomalous diffusion regimes for the intermediate range (superdiffusion) and the global range (subdiffusion).</jats:p> On bed particle diffusion in gravel bed flows under weak bed load transport Water Resources Research |
| spellingShingle | Nikora, Vladimir, Habersack, Helmut, Huber, Thomas, McEwan, Ian, Water Resources Research, On bed particle diffusion in gravel bed flows under weak bed load transport, Water Science and Technology |
| title | On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_full | On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_fullStr | On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_full_unstemmed | On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_short | On bed particle diffusion in gravel bed flows under weak bed load transport |
| title_sort | on bed particle diffusion in gravel bed flows under weak bed load transport |
| title_unstemmed | On bed particle diffusion in gravel bed flows under weak bed load transport |
| topic | Water Science and Technology |
| url | http://dx.doi.org/10.1029/2001wr000513 |