Análisis del riesgo del transporte fluvial de los lodos mineros residuales del vertido de Aznalcóllar en el valle medio-bajo del río Guadiamar

  1. A. Benito Calvo 2
  2. G. Benito Ferrández 1
  3. F. Gallart 3
  4. J. P. Martín-Vide 4
  5. D. Regües 3
  6. E. Bladé 4
  1. 1 Consejo Superior de Investigaciones Científicas
    info

    Consejo Superior de Investigaciones Científicas

    Madrid, España

    ROR https://ror.org/02gfc7t72

  2. 2 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

  3. 3 Instituto de Ciencias de la Tierra Jaume Almera
    info

    Instituto de Ciencias de la Tierra Jaume Almera

    Barcelona, España

    ROR https://ror.org/01nsd7y51

  4. 4 Universitat Politècnica de Catalunya
    info

    Universitat Politècnica de Catalunya

    Barcelona, España

    ROR https://ror.org/03mb6wj31

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Revista:
Revista de la Sociedad Geológica de España

ISSN: 0214-2708

Ano de publicación: 2001

Volume: 14

Número: 1-2

Páxinas: 89-100

Tipo: Artigo

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Outras publicacións en: Revista de la Sociedad Geológica de España

Resumo

After the Aznalcóllar pyrite mine disaster (Seville, Spain) which caused the spilling of some 4.5 hm3 of acid water, the floodplains of the rivers Agrio and Guadiamar were rapidly cleaned of waste sludge. However, despite the efficiency of cleaning activities, there is still evidence of a fine superficial layer of sludge and some soil contamination, with the consequent risk of remobilisation of the pollutants by water erosion. There is much concern that these contaminated sediments may affect the precious ecosystems of the Doñana National Park and the Guadalquivir marshlands. This report describes the evaluation of the risk of mobilisation of the waste sludge through: 1) detailed geomorphological analysis, indicating potential areas of erosion-sedimentation on the floodplains of the rivers Agrio and Guadiamar, and predicted dynamics of the waste sludge, and 2) evaluation of the potential dispersion of the waste sludge provoked by future flood events, including hydraulic calculations to model channel flow and the analysis of the texture of the sludge to obtain critical transport and sedimentation values. Findings suggest that the waste sludge is likely to be transported and deposited within the Doñana National Park during future flood events.

Fonte de datos: Dialnet