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| Titel |
Sediment routing modelling: The use of FLUVIAL-12 to evaluate and re-design flushing flows in the lower Ebro. |
| VerfasserIn |
A. Tena, M. B. Singer, R. J. Batalla |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250042042
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| Zusammenfassung |
| The lower Ebro experiences long-term hydrological and sedimentary alterations due to
upstream reservoirs. One of the most important consequences is the disruption of sediment
transfer, a fact that reduces the sediment load and affects river morphology. Among other
factors, the low rates of sediment transport in the fluvial system favour the development of
macrophytes. Macrophytes affect flow resistance, raising the water level locally, altering
sediment transport, and clogging riverine infrastructures. Since 2002, flushing flows have
been implemented and monitored in the Ebro, attempting to control macrophyte populations.
These dam releases have demonstrated significant potential to scour the riverbed and
transport sediment (peak flows in these events are higher than those attained during natural
floods). They generally eliminate most macrophytes in areas close to the dams (90%),
but their capacity to remove aquatic plants diminishes downstream ( |
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