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| Titel |
A tentative 10-year sediment budget of the lower River Ebro (NE Iberian Peninsula) |
| VerfasserIn |
A. Tena, R. J. Batalla, D. Vericat, J. A. López-Tarazón |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250022100
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| Zusammenfassung |
| Dams in the Ebro basin alter flow regime and sediment transport of most rivers in the
catchment. This fact, together with changes in land use, results in a sustained decrease of the
sediment load since the beginning of the 20th century, with special impact on the sediment
load of the lower reaches of the river. The aim of this work is to develop a long-term
suspended sediment budget for the river reach downstream the largest complex of dams in the
basin (Mequinenza-Ribarroja-Flix, impounding around 1.7 km3 of water). As a first step we
have estimated the river’s sediment load over a 10-year period based on turbidity and water
discharge records continuously measured by the Ebro Water Authorities. Turbidity
measurements have been calibrated by means of five-hundred manual water samples
collected during all flow conditions (i.e. floods and low flows) between 2002 and 2008. Water
samples have been collected 28 km downstream from the lowermost Flix Dam, at
the Mora d’Ebre Monitoring Section (hereafter MEMS). Discharge at MEMS is
estimated by routing the flow hydrographs from the Asc |
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