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 foundat

Labyrinth and Piano Key Weirs contains the state-of-the-art on this still non-conventional hydraulic structure, demonstrates that dam engineering currently experiences a strong revival of labyrinth oriented weirs, and is particularly of interest to academia, researchers and professionals working in the area of hydraulic engineering, and to dam control authorities and dam owners.