Tracer dispersion in bedload transport
Bedload particles entrained by rivers tends to disperse as they move downstream. In this paper, we use the erosion-deposition model of Charru et al. (2004) to describe the velocity and the spreading of a plume of tracer particles. We restrict our analysis to steady-state transport above a flat bed o...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2013-12-01
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| Series: | Advances in Geosciences |
| Online Access: | http://www.adv-geosci.net/37/1/2013/adgeo-37-1-2013.pdf |
| _version_ | 1818096934138675200 |
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| author | E. Lajeunesse O. Devauchelle M. Houssais G. Seizilles |
| author_facet | E. Lajeunesse O. Devauchelle M. Houssais G. Seizilles |
| author_sort | E. Lajeunesse |
| collection | DOAJ |
| description | Bedload particles entrained by rivers tends to disperse as they move
downstream. In this paper, we use the erosion-deposition model of
Charru et al. (2004) to describe the velocity and the spreading of a plume of
tracer particles. We restrict our analysis to steady-state transport above a
flat bed of uniform sediment. The transport of tracer particles is then
controlled by downstream advection and particle exchange with the immobile
bed. After a transitional regime dominated by initial conditions, the
evolution of a plume of markers tends asymptotically towards classical
advection-diffusion: its average position grows linearly with time, whereas
it spreads like the square root of time. |
| first_indexed | 2024-12-10T23:12:30Z |
| format | Article |
| id | doaj.art-70050374c8774753ac309ea96763cd68 |
| institution | Directory Open Access Journal |
| issn | 1680-7340 1680-7359 |
| language | English |
| last_indexed | 2024-12-10T23:12:30Z |
| publishDate | 2013-12-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Advances in Geosciences |
| spelling | doaj.art-70050374c8774753ac309ea96763cd682022-12-22T01:29:54ZengCopernicus PublicationsAdvances in Geosciences1680-73401680-73592013-12-01371610.5194/adgeo-37-1-2013Tracer dispersion in bedload transportE. Lajeunesse0O. Devauchelle1M. Houssais2G. Seizilles3Institut de Physique du Globe – Sorbonne Paris Cité, Équipe de Dynamique des fluides géologiques, 1 rue Jussieu, 75238 Paris cedex 05, FranceInstitut de Physique du Globe – Sorbonne Paris Cité, Équipe de Dynamique des fluides géologiques, 1 rue Jussieu, 75238 Paris cedex 05, FranceInstitut de Physique du Globe – Sorbonne Paris Cité, Équipe de Dynamique des fluides géologiques, 1 rue Jussieu, 75238 Paris cedex 05, FranceInstitut de Physique du Globe – Sorbonne Paris Cité, Équipe de Dynamique des fluides géologiques, 1 rue Jussieu, 75238 Paris cedex 05, FranceBedload particles entrained by rivers tends to disperse as they move downstream. In this paper, we use the erosion-deposition model of Charru et al. (2004) to describe the velocity and the spreading of a plume of tracer particles. We restrict our analysis to steady-state transport above a flat bed of uniform sediment. The transport of tracer particles is then controlled by downstream advection and particle exchange with the immobile bed. After a transitional regime dominated by initial conditions, the evolution of a plume of markers tends asymptotically towards classical advection-diffusion: its average position grows linearly with time, whereas it spreads like the square root of time.http://www.adv-geosci.net/37/1/2013/adgeo-37-1-2013.pdf |
| spellingShingle | E. Lajeunesse O. Devauchelle M. Houssais G. Seizilles Tracer dispersion in bedload transport Advances in Geosciences |
| title | Tracer dispersion in bedload transport |
| title_full | Tracer dispersion in bedload transport |
| title_fullStr | Tracer dispersion in bedload transport |
| title_full_unstemmed | Tracer dispersion in bedload transport |
| title_short | Tracer dispersion in bedload transport |
| title_sort | tracer dispersion in bedload transport |
| url | http://www.adv-geosci.net/37/1/2013/adgeo-37-1-2013.pdf |
| work_keys_str_mv | AT elajeunesse tracerdispersioninbedloadtransport AT odevauchelle tracerdispersioninbedloadtransport AT mhoussais tracerdispersioninbedloadtransport AT gseizilles tracerdispersioninbedloadtransport |