Labyrinth and Piano Key Weirs

The book contains the state-of-the-art on this still non-conventional hydraulic structure, and is divided into six main themes:

  • Physical Modeling. Hydraulic capacity
  • Physical Modeling. Downstream fittings
  • Numerical Modeling
  • Hydraulic Design
  • Planned and achieved projects
  • Nomenclature, Database, Future developments.
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Labyrinth spillways are almost as old as dam engineering. In spite of the fact that they appear as a very good technical-economical compromise, only 0.1% of large dams are equipped with such weirs. The main reason for this is that traditional labyrinth weirs usually cannot be installed on top of concrete gravity dams as they require a large foundation surface. In 2003 an improved concept of traditional labyrinth spillway emerged, with alveoli developed in overhangs from a reduced support area: the Piano Key Weir (PKW). The Piano Key Weir is a weir of particular geometry, associating to a labyrinth shape the use of overhangs to reduce the basis length. The main advantage of Piano Key Weirs is that it can be directly placed on a dam crest.

Weight 1 kg
Dimensions 25 × 17 × 2 cm
Book Author

Anton J. Schleiss, Bernard Reverchon, Frédéric Laugier, Jean-Louis Boillat, Michel Pirotton, Sébastien Erpicum











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