Labyrinth and Piano Key Weirs II

Keynote lectures

The Piano KeyWeirs: 15 years of Research & Development – Prospect
M. Ho Ta Khanh

Improvement of labyrinth weirs shape
A. Ouamane

Embankment dam spillways and energy dissipators
H. Chanson

A. Physical and numerical modeling – Hydraulic capacity and scale effects

Effects of the crest shape on the discharge efficiency of a type A Piano KeyWeir
G.M. Cicero & J.R. Delisle

Influence of geometrical parameters on PK-Weirs discharge with 3D numerical analysis
V. Lefebvre, J. Vermeulen & B. Blancher

Staged labyrinth weirs and their effects on the outflow hydrograph
M.R. Dabling & B.P. Tullis

Escouloubre Piano Key weir: Prototype versus scale models
S. Erpicum, A. Silvestri, B. Dewals, P. Archambeau, M. Pirotton, M. Colombié & L. Faramond

Scale effects related to the rating curve of cylindrically crested Piano Key weirs
M. Pfister, E. Battisacco, G. De Cesare & A.J. Schleiss

B. Physical and numerical modeling – Submergence and energy dissipation

Submerged flow regimes of Piano Key weir
F. Belaabed & A. Ouamane

Experimental study on vertical velocity and submergence depth near Piano Key weir
N. Sharma & H. Tiwari

Discharge characteristics of Piano Key weirs under submerged flow
G.M. Cicero & J.R. Delisle

Comparative analysis of the energy dissipation on a stepped spillway downstream of a Piano KeyWeir
A. Silvestri, P. Archambeau, M. Pirotton, B. Dewals & S. Erpicum

C. Hydraulic and structural design

Comparison of Piano KeyWeirs with labyrinth and gated spillways: Hydraulics, cost, constructability and operations
G.S. Paxson, B.P. Tullis & D.J. Hertel

An analytical approach for Piano Key weir hydraulic design
O. Machiels, B. Dewals, P. Archambeau, M. Pirotton & S. Erpicum

Estimation of A-type Piano Key weir rating curve
M. Pfister & A.J. Schleiss

D. Planned projects

Design of a Piano-KeyWeir for Giritale Dam spillway in Sri Lanka
H.M. Jayatillake & K.T.N. Perera

Piano KeyWeir spillway: Upgrade option for a major dam
M.A. Phillips & E.J. Lesleighter

Designing a new spillway for the Rassisse Dam
A. Bail, L. Deroo & J.P. Sixdenier

Hydraulic scale model of the daisy-shape spillway on the Causse Corrézien dam
P.E. Loisel, F. Duval & S. Chanourdie

Application of the Piano KeyWeir spillway in the Republic of South Africa
A.J. Botha, I.P. Fitz, A.J. Moore, F.E. Mulder & N.J. Van Deventer

Hydraulic physical model of Piano KeyWeirs as additional flood spillways on the Charmine dam
P.E. Loisel, P. Valley & F. Laugier

Quipolly dam: A case study on customizing Fusegates® design for adverse spillway conditions
M. Beretta, A.G. Merino, O. Cazaillet & R. Batterham

E. Existing projects

Overview of Piano KeyWeirs experience developed at EDF during the past few years
F. Laugier, J. Vermeulen &V. Lefebvre

The first commercial Piano KeyWeir in Switzerland
P. Eichenberger

Raising the bellmouth spillway at Black Esk reservoir using Piano Key weirs
J.C. Ackers, F.C.J. Bennett, T.A. Scott & G. Karunaratne

Spillway capacity upgrade at Malarce dam: Construction of an additional piano key weir spillway
T. Pinchard, J.-L. Farges, J.-M. Boutet, A. Lochu & F. Laugier

F. Future developments

Effect of driftwood on hydraulic head of Piano Key weirs
M. Pfister, A.J. Schleiss & B.P. Tullis

Experimental and numerical study of the hydraulic performance of a trapezoidal Piano Key weir
G.M. Cicero, J.R. Delisle, V. Lefebvre & J. Vermeulen

Overview of Piano Key weir prototypes and scientific model investigations
M. Leite Ribeiro, M. Pfister & A.J. Schleiss

Effective spillways: Harmonizing labyrinth weir hydraulic efficiency and project requirements
B.M. Crookston, G.S. Paxson & D.B. Campbell

Author index

Biography

Sébastien Erpicum, Frédéric Laugier, Michael Pfister, Michel Pirotton, Guy-Michel Cicero, Anton J. Schleiss