Piano Key Weirs Event Schedule

Day 1: Technical Sessions

9:00 AM – Welcome
Session A: R&D – Floating Objects and Sedimentation

9:05 AM – Labyrinth and PKW spillways in the USA
Paxson G., Crookston – USA/Belgium

9:25 AM – Behavior of floating trees at coexisting Piano Key Weir and gated spillway
Yang J. ,Helgesson – Sweden

9:45 AM – Effect of driftwood on the hydraulic performance of A-type PKWs in-stream or at reservoirs
Venetz P., Pfister – Switzerland

10:05 AM – Impact of sedimentation on the discharge capacity of labyrinth weirs
Belzner F. ,Gebhardt – Germany

Session B: R&D – Hydraulics

10:55 AM – Remote sensing of the 3D water surface downstream of labyrinth weirs
Langohr P., Bung – Germany

11:15 AM – Interfacial velocity characteristics downstream of a PKW vs. linear weir
Belay B.S., Oertel – Germany

11:35 AM – Model-Prototype upscaling of discharge capacity of Piano Key Weir
Yang J. ,Nilsen – Sweden

11:55 AM – Physical model investigations on nappe instabilities at labyrinth weirs
Gebhardt M., Belzner – Germany

Session C: R&D – Design and Application

1:45 PM – Studies of non-rectilinear weirs – From labyrinth to PKW
Ouamane A., Lempérière – Algeria

2:05 PM – Enhancing the hydraulic efficiency of PKWs – Recent research
Yang J., Li – Sweden

2:25 PM – Innovative association of Fusegate® and PKW
Lempérière F., Chapuis – France

2:45 PM – Innovative use of PKWs or labyrinth weirs for long dams in plains
Ho Ta Khanh M. – Vietnam

Session D: R&D – Numerical Modeling

3:35 PM – Sensitivity analysis of PKWs using CFD and empirical methods
Oukaili F. ,Bercovitz – France

3:55 PM – Experimental and numerical investigation of A-type rectangular side PKW
Hussain S., Ahmad – India

4:15 PM – Key width ratio influence on PKW discharge via OpenFOAM simulations
Lüddecke L., Oertel – Germany

4:35 PM – Investigation on flow field near A-Type PKW
Quamar S., Ahmad – India

4:55 PM – Wrap Up

Day 2: Project Applications

Session E: Projects – Lessons Learned

9:00 AM – Lessons from Prado Dam labyrinth spillway design
Diaz Y., Philips M., Allen J.D., Crookston B. – USA

9:20 AM – Research and application of PKWs in Vietnam (2025)
Ho Ta Khanh M., Dau Xuan T. – Vietnam

9:40 AM – Case study: Burton Pond Dam – “Honey, I Shrunk the PKW”
Bisio D. – USA

10:00 AM – PKWs with orifice sluice
Dau Xuan T. – Vietnam

Session F: Projects – Design

10:50 AM – Arced labyrinth spillway for Dog River Dam
Kirksey B., Tuladhar R., Hudock G. – USA

11:10 AM – Springton Spillway: Arced labyrinth weir research and application
Thompson S., Tullis B., Crookston B., Marchisello M. – USA

11:30 AM – La Laye Dam design approach
Roy M., Derrien S., Schaguene J.D., Dautois G. – France

11:50 AM – 3D modeling for Lower Crow Dam rehabilitation
Bartels J., Bernedo Sanchez C. – USA

Session G: Projects – Construction

1:40 PM – PKWs around the world
Erpicum S., Jamali T., Crookston B. – Belgium

2:00 PM – Nachtigal dam: 4917 m long labyrinth spillway
Magnan D., Blancher B., Chapuis A., Guillemot T., Erpicum – France

2:20 PM – High-altitude labyrinth weir design & construction
Miller N., Provencher M. – USA

2:40 PM – Stainless steel PKW at Oule Dam spillway
Fournié Y., Tralli H., Alende J.D., Erpicum S. – France

3:00 PM – Tour Summary

3:20 PM – Networking Afternoon Break