Balance sedimentario del embalse de Ribarroja

Autores/as

  • A. Tena Fluvial Dynamics Research Group (RIUS), Universidad de Lleida http://orcid.org/0000-0001-8388-6510
  • D. Vericat Fluvial Dynamics Research Group (RIUS), Universidad de Lleida
  • R.J. Batalla Fluvial Dynamics Research Group (RIUS), Universidad de Lleida

DOI:

https://doi.org/10.18172/cig.4894

Palabras clave:

Balance sedimentario, embalses, río Ebro, sedimento en suspensión

Resumen

El objetivo de este estudio ha sido construir un balance de sedimentos del embalse de Ribarroja, situado en el tramo inferior del río Ebro. Para ello, se han analizado datos continuos de caudal y transporte de sedimentos en suspensión tomados en los principales ríos que desembocan en el embalse, así como en la salida de la presa, para el período 2008-2011. La carga de sedimentos estimada aguas arriba del embalse de Mequinenza fue de 0.66 × 106 t a-1, mientras que la salida estimada fue de 0.04 × 106 t a-1. El aporte de sedimentos proveniente de los grandes afluentes pirenaicos, aunque altamente regulados, Segre y Cinca fue de 0,16 × 106 t a-1, mientras que los ríos intermitentes que fluyen naturalmente desde la Cordillera Ibérica (Matarraña y Algars) suministraron una carga media de 760 t a-1. La carga de sedimentos en suspensión atrapada en los embalses de Mequinenza y Ribarroja para el período de estudio se estimó en 0,78 × 106 t a-1, lo que implica una reducción de ca. 95% de la carga de sedimentos del río. Los resultados ilustran el papel de los embalses en la interrupción de la transferencia de sedimentos en el tramo bajo del Ebro, en un contexto de déficit sedimentario estructural, tras los cambios generalizados de uso del suelo (reforestación) que se produjeron en la cuenca a partir de los años cuarenta del siglo pasado.

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Publicado

2021-07-01

Cómo citar

1.
Tena A, Vericat D, Batalla R. Balance sedimentario del embalse de Ribarroja. CIG [Internet]. 1 de julio de 2021 [citado 22 de febrero de 2025];47(2):415-33. Disponible en: https://publicaciones.unirioja.es/ojs/index.php/cig/article/view/4894

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