Impact of flow variability and sediment characteristics on channel width evolution
Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, also the frequency and duration of streamflow oscillations might be important for the river channel formation. In addition, the river morphology appears influenced also by...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2018-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://doi.org/10.1051/e3sconf/20184005044 |
| _version_ | 1818620105429352448 |
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| author | Vargas-Luna Andrés Crosato Alessandra Byishimo Protogene Uijttewaal Wim |
| author_facet | Vargas-Luna Andrés Crosato Alessandra Byishimo Protogene Uijttewaal Wim |
| author_sort | Vargas-Luna Andrés |
| collection | DOAJ |
| description | Alluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, also the frequency and duration of streamflow oscillations might be important for the river channel formation. In addition, the river morphology appears influenced also by both size and degree of uniformity of the sediment. Nevertheless, many morphodynamic studies still represent the flow regime with a single value of the discharge, often corresponding to the bankfull condition, and the sediment with its median grain size. This work investigates the effects of streamflow variability and sediment characteristics on channel width formation, analysing the evolution of experimental streams with different sediments and discharge hydrographs. Results show that the formative condition of the channel width is not the geometric bankfull flow but a rather frequent peak flow. Remarkably different channel configurations arise from different sediment characteristics in the laboratory, where sediment non-uniformity produces more stable banks. |
| first_indexed | 2024-12-16T17:48:05Z |
| format | Article |
| id | doaj.art-c53b6a8b4b9c422daba39ec41317aa59 |
| institution | Directory Open Access Journal |
| issn | 2267-1242 |
| language | English |
| last_indexed | 2024-12-16T17:48:05Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj.art-c53b6a8b4b9c422daba39ec41317aa592022-12-21T22:22:25ZengEDP SciencesE3S Web of Conferences2267-12422018-01-01400504410.1051/e3sconf/20184005044e3sconf_riverflow2018_05044Impact of flow variability and sediment characteristics on channel width evolutionVargas-Luna AndrésCrosato AlessandraByishimo ProtogeneUijttewaal WimAlluvial rivers are shaped by sequences of water flows excavating their channels. Observations show that besides the magnitude, also the frequency and duration of streamflow oscillations might be important for the river channel formation. In addition, the river morphology appears influenced also by both size and degree of uniformity of the sediment. Nevertheless, many morphodynamic studies still represent the flow regime with a single value of the discharge, often corresponding to the bankfull condition, and the sediment with its median grain size. This work investigates the effects of streamflow variability and sediment characteristics on channel width formation, analysing the evolution of experimental streams with different sediments and discharge hydrographs. Results show that the formative condition of the channel width is not the geometric bankfull flow but a rather frequent peak flow. Remarkably different channel configurations arise from different sediment characteristics in the laboratory, where sediment non-uniformity produces more stable banks.https://doi.org/10.1051/e3sconf/20184005044 |
| spellingShingle | Vargas-Luna Andrés Crosato Alessandra Byishimo Protogene Uijttewaal Wim Impact of flow variability and sediment characteristics on channel width evolution E3S Web of Conferences |
| title | Impact of flow variability and sediment characteristics on channel width evolution |
| title_full | Impact of flow variability and sediment characteristics on channel width evolution |
| title_fullStr | Impact of flow variability and sediment characteristics on channel width evolution |
| title_full_unstemmed | Impact of flow variability and sediment characteristics on channel width evolution |
| title_short | Impact of flow variability and sediment characteristics on channel width evolution |
| title_sort | impact of flow variability and sediment characteristics on channel width evolution |
| url | https://doi.org/10.1051/e3sconf/20184005044 |
| work_keys_str_mv | AT vargaslunaandres impactofflowvariabilityandsedimentcharacteristicsonchannelwidthevolution AT crosatoalessandra impactofflowvariabilityandsedimentcharacteristicsonchannelwidthevolution AT byishimoprotogene impactofflowvariabilityandsedimentcharacteristicsonchannelwidthevolution AT uijttewaalwim impactofflowvariabilityandsedimentcharacteristicsonchannelwidthevolution |