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Descripción
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| There are reservoirs with an adverse permeable geology in which the traditional sealing with a grout curtain is not possible or is unaffordable because of the large surface to be treated. A usual alternative in such cases is the use of membrane liners, and more rarely of other waterproofing materials. The case study that is analyzed in this paper is the Campos del Paraíso Reservoir, a recently finished conservation dam that has been sealed using a clay blanket. A significant seepage problem was detected during de construction of this dam, which is located on the contact between Cretaceous and Miocene. The Cretaceous layers surface at the toe of the banks and constitute the underlying geology of the valley, where the existing paleo-morphology is covered by a Quartenary alluvial plain. The Cretaceous materials are sub-horizontal, permeable, limestone breccias layers, with massive gypsum insertions. These permeable layers are randomly connected with the reservoir, because the alluvial plain, although its clayey appearance, is very heterogeneous, with numerous sand pockets and gravel fans. The water resources that are going to be regulated at the Campos del Paraíso Reservoir are highly valuable, due to the regional scarcity, to its origin from another basin (requiring a pumping of around 300 m) and to its own function of guaranteeing water supply for 800.000 inhabitants in more than 100 populations. Thus, ensuring the water-tightness of the reservoir was a key issue on the construction of this dam. A clay blanket has been use for sealing the reservoir. The specific characteristics of the reservoir, the field investigations, the blanket design and execution features, and its performance during the beginning of the first impoundment are described in this article. | |
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Internacional
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Si |
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Nombre congreso
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9th ICOLD European Club Symposium. Sharing experience for safe and sustainable water storage. |
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Tipo de participación
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960 |
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Lugar del congreso
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Venecia |
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Revisores
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Si |
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ISBN o ISSN
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DOI
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Fecha inicio congreso
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10/04/2013 |
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Fecha fin congreso
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12/04/2013 |
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Desde la página
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1 |
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Hasta la página
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6 |
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Título de las actas
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Proceedings of the 9th ICOLD European Club Symposium |