Determinación del origen del sedimento en suspensión en una pequeña cuenca agrícola mediterránea: Can Revull, Mallorca

• Joan Estrany ^[1] ; Celso García ^[1] ; Núria Martínez-Carreras ^[2]
  1. [1] Universitat de les Illes Balears

     Universitat de les Illes Balears

     Palma de Mallorca, España

     
  2. [2] Centre de Recherche Public - Gabriel Lippmann
• Localización: Avances de la geomorfología en España, 2010-2012: actas de la XII Reunión Nacional de Geomorfología, Santander, 17-20 septiembre de 2012 / coord. por Alberto González Díez, 2012, ISBN 978-84-86116-54-5, págs. 211-214
• Idioma: español
• Títulos paralelos:
  • Determining suspended-sediment sources in a small Mediterranean agricultural catchment:: Can Revull, Mallorca
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• Resumen

  • Can Revull is a small Mediterranean agricultural catchment (1.03 km2) under traditional soil and water conservation practices. Applying the fingerprinting technique, the relative contribution of the two main potential sources –channel banks and topsoils– was determined. This approach involves the use of a range of properties to characterise potential sediment sources, and a comparison of the measured properties of the suspended sediment transported by the river with those of potential sources. A total of 18 representative samples of potential sources were collected. At the gauging station, where discharge and turbidity were continuously monitored, 12 time-integrated suspended sediment samples were collected during two hydrological years (2004-2006). Results have shown that during events with low rainfall intensities and increased vegetation cover, runoff was mainly generated by the saturation mechanisms causing the mobilisation of sediment previously deposited in the channel bed. However, events with higher rainfall intensities, which mainly occurred during periods with lower vegetation cover, coincided with the dominance of sediment transported from agricultural hillslopes.