Labyrinth and Piano Key Weirs III : Proceedings of the 3rd International Workshop on Labyrinth and Piano Key Weirs (PKW 2017), February 22-24, 2017, Qui Nhon, Vietnam

Since the first implementation by Electricité de France on the Goulours dam (France) in 2006, the Piano Key Weir has become a more and more applied solution to increase the discharge capacity of existing spillways. In parallel, several new large dam projects have been built with such a flood control structure, usually in combination with gates. Today, more than 25 Piano Key Weirs are in operation or under construction all over the world. More than 15 years of research and development have enabled detailed investigations of the hydraulic and structural behaviour of the Piano Key Weir complex structure and have provided more and more accurate design equations. Following the proceedings of the first two workshops held in Liege (Belgium – 2011) and Paris (France – 2013), **Labyrinth and Piano Key Weirs III** collects the contributions presented by people with varied background, from researchers to practitioners, at the 3rd International Workshop on Labyrinth and Piano Key Weirs - PKW 2017 (22-24 February 2017, Qui Nhon, Vietnam). The papers, reviewed and accepted by an International Scientific Committee, summarize the current state-of-the-art on Piano Key Weirs from a theoretical to a practical point of view, and present most of the main projects in operation or under construction. **Labyrinth and Piano Key Weirs III** is thus a reference for students, practitioners and researchers interested in Dams Engineering. Cover -- Half Title -- Title Page -- Copyright Page -- Table of Contents -- Preface -- Acknowledgements -- Organization -- Organizing institutions -- Supporting institutions -- Sponsoring companies -- Keynote lectures -- History and development of Piano Key Weirs in Vietnam from 2004 to 2016 -- Twenty years of research in Biskra University for Labyrinths and Piano Key Weirs and associated fuse plugs -- Hydraulics of Piano Key Weirs: A review -- Overview of design and construction of 11 Piano Key Weirs spillways developed in France by EDF from 2003 to 2016 -- I: Research and development -- I.1: Hydraulics -- Research on Piano Key Weirs capacity for free and submerged flows -- Flow regimes over trapezoidal Piano Key Weirs -- Synthesis of Piano Key Weir experimental studies at LNHE -- Study of the influence of submergence on the upstream flow of Piano Key Weir -- I.2: Geometry -- The effect of the geometric shape of the alveoli on the performance of Piano Key Weirs -- Numerical investigation of wall thickness influence on Piano Key Weir discharge coefficients: A preliminary study -- Experimental study of discharge coefficient of a Piano Key Side Weir -- I.3: Fluid-structure interactions and aeration -- Fluid structure interaction of Piano Key Weirs -- Design of a Piano Key Weir aeration network -- Could Piano Key Weirs be subject to nappe oscillations? -- I.4: Energy dissipation -- Toe-scour formation at Piano Key Weirs -- Experimental study for energy dissipation using stilling basin downstream of Piano Key Weirs type A -- I.5: Future applications and developments -- Piano Key and Labyrinth Weirs at German waterways: Recent and future research of the BAW "Since the first implementation by Electricit?? de France on the Goulours dam (France) in 2006, the Piano Key Weir has become a more and more applied solution to increase the discharge capacity of existing spillways. In parallel, several new large dam projects have been built with such a flood control structure, usually in combination with gates. Today, more than 25 Piano Key Weirs are in operation or under construction all over the world. More than 15 years of research and development have enabled detailed investigations of the hydraulic and structural behaviour of the Piano Key Weir complex structure and have provided more and more accurate design equations. Following the proceedings of the first two workshops held in Liege (Belgium??? 2011) and Paris (France??? 2013), Labyrinth and Piano Key Weirs III collects the contributions presented by people with varied background, from researchers to practitioners, at the 3rd International Workshop on Labyrinth and Piano Key Weirs - PKW 2017 (22-24 February 2017, Qui Nhon, Vietnam). The papers, reviewed and accepted by an International Scientific Committee, summarize the current state-of-the-art on Piano Key Weirs from a theoretical to a practical point of view, and present most of the main projects in operation or under construction. Labyrinth and Piano Key Weirs III is thus a reference for students, practitioners and researchers interested in Dams Engineering."--Provided by publisher Since the first implementation by Electricite de France on the Goulours dam (France) in 2006, the Piano Key Weir has become a more and more applied solution to increase the discharge capacity of existing spillways. In parallel, several new large dam projects have been built with such a flood control structure, usually in combination with gates. Today, more than 25 Piano Key Weirs are in operation or under construction all over the world. More than 15 years of research and development have enabled detailed investigations of the hydraulic and structural behaviour of the Piano Key Weir complex structure and have provided more and more accurate design equations. Following the proceedings of the first two workshops held in Liege (Belgium 2011) and Paris (France 2013), Labyrinth and Piano Key Weirs III collects the contributions presented by people with varied background, from researchers to practitioners, at the Third International Workshop on Labyrinth and Piano Key Weirs - PKW 2017 (22-24 February 2017, Qui Nhon, Vietnam). The papers, reviewed and accepted by an International Scientific Committee, summarize the current state-of-the-art on Piano Key Weirs from a theoretical to a practical point of view, and present most of the main projects in operation or under construction Content: Cover Half Title Title Page Copyright Page Table of Contents Preface Acknowledgements Organization Organizing institutions Supporting institutions Sponsoring companies Keynote lectures History and development of Piano Key Weirs in Vietnam from 2004 to 2016 Overview of design and construction of 11 Piano Key Weirs spillways developed in France by EDF from 2003 to 2016 I: Research and development I.1: Hydraulics Synthesis of Piano Key Weir experimental studies at LNHE Study of the influence of submergence on the upstream flow of Piano Key Weir I.2: Geometry