4th International Workshop Labyrinth and Piano Key Weirs, 7-9 October 2025, Atlanta, Georgia

Nonlinear weirs are attractive to practitioners as in some cases they provide a hydro-economical solution for new and rehabilitation projects. To academia, they remain a topic of interest due to a combination of the complex flow patterns they generate and the wide range of relevant geometries and application scenarios in rivers, dams, and other water resources applications with research topics including discharge efficiency, aeration, energy dissipation, local scour, driftwood and ice, and flow instabilities.

Following three editions held in Europe and Asia (Liège, Belgium in 2011; Paris, France in 2013 and Qui Nhon, Vietnam in 2017), the 4th international workshop on Labyrinth and PKW moves to the United States, where several labyrinth and PKW prototypes coexist. As for the three previous editions, the workshop aims at bringing together people with varied background (engineers, researchers,...) to present and summarize the latest knowledge and developments on these non conventional hydraulic structures.

Special emphasis will be put on planned and existing projects, data from real structures operation but also latest research developments. High level papers selected by the International Scientific Committee and presented during the workshop will be published in a hard cover book before the conference. The workshop environment would be friendly, cooperative and non-competitive with a priority on information quality and knowledge exchange.

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