The graded alluvial river: Profile concavity and downstream fining
Abstract There has been quite some debate on the relative importance of particle abrasion and grain size selective transport regarding the river profile form and the associated grain size trends in a graded alluvial stream. Here we present new theoretical equations for the graded alluvial river prof...
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| Format: | Article |
| Language: | English |
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Wiley
2016-06-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL068898 |
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| author | Astrid Blom Enrica Viparelli Víctor Chavarrías |
| author_facet | Astrid Blom Enrica Viparelli Víctor Chavarrías |
| author_sort | Astrid Blom |
| collection | DOAJ |
| description | Abstract There has been quite some debate on the relative importance of particle abrasion and grain size selective transport regarding the river profile form and the associated grain size trends in a graded alluvial stream. Here we present new theoretical equations for the graded alluvial river profile that account for the effects of particle abrasion and grain size selective transport in the absence of subsidence, uplift, and sea level change. Under graded conditions we find that abrasion results in a mild profile concavity and downstream fining, whereas under aggradational conditions grain size selective transport can lead to large spatial changes in channel slope and bed surface mean grain size. |
| format | Article |
| id | doaj-art-8afe90ca26c74a1386c41ca02f4edc45 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-8afe90ca26c74a1386c41ca02f4edc452025-08-20T03:10:24ZengWileyGeophysical Research Letters0094-82761944-80072016-06-0143126285629310.1002/2016GL068898The graded alluvial river: Profile concavity and downstream finingAstrid Blom0Enrica Viparelli1Víctor Chavarrías2Faculty of Civil Engineering and Geosciences Delft University of Technology Delft NetherlandsDepartment of Civil and Environmental Engineering University of South Carolina Columbia South Carolina USAFaculty of Civil Engineering and Geosciences Delft University of Technology Delft NetherlandsAbstract There has been quite some debate on the relative importance of particle abrasion and grain size selective transport regarding the river profile form and the associated grain size trends in a graded alluvial stream. Here we present new theoretical equations for the graded alluvial river profile that account for the effects of particle abrasion and grain size selective transport in the absence of subsidence, uplift, and sea level change. Under graded conditions we find that abrasion results in a mild profile concavity and downstream fining, whereas under aggradational conditions grain size selective transport can lead to large spatial changes in channel slope and bed surface mean grain size.https://doi.org/10.1002/2016GL068898river longitudinal profileprofile concavitydownstream finingparticle abrasionselective transport |
| spellingShingle | Astrid Blom Enrica Viparelli Víctor Chavarrías The graded alluvial river: Profile concavity and downstream fining Geophysical Research Letters river longitudinal profile profile concavity downstream fining particle abrasion selective transport |
| title | The graded alluvial river: Profile concavity and downstream fining |
| title_full | The graded alluvial river: Profile concavity and downstream fining |
| title_fullStr | The graded alluvial river: Profile concavity and downstream fining |
| title_full_unstemmed | The graded alluvial river: Profile concavity and downstream fining |
| title_short | The graded alluvial river: Profile concavity and downstream fining |
| title_sort | graded alluvial river profile concavity and downstream fining |
| topic | river longitudinal profile profile concavity downstream fining particle abrasion selective transport |
| url | https://doi.org/10.1002/2016GL068898 |
| work_keys_str_mv | AT astridblom thegradedalluvialriverprofileconcavityanddownstreamfining AT enricaviparelli thegradedalluvialriverprofileconcavityanddownstreamfining AT victorchavarrias thegradedalluvialriverprofileconcavityanddownstreamfining AT astridblom gradedalluvialriverprofileconcavityanddownstreamfining AT enricaviparelli gradedalluvialriverprofileconcavityanddownstreamfining AT victorchavarrias gradedalluvialriverprofileconcavityanddownstreamfining |