Advances in the hydraulics of labyrinth weirs

Michael Pfister, Willi H. Hager, Blake Tullis

Monday 29 june 2015

17:00 - 17:15h at Africa (level 0)

Themes: (T) Water engineering, (ST) Experimental facilities and instrumentation

Parallel session: 3F. Engineering instrumentation

Piano Key Weirs have been rapidly introduced to the hydraulics community within the past decade. Its forerunners are the labyrinth weirs. Based on space shortage along the weir crest zone, these weirs were developed to increase the specific discharge by employing a non-straight weir section as for the standard weirs. Instead, labyrinth weirs have a polygonal weir plan, by which the overflow length is increased, resulting in a higher specific unit discharge. The paper to be published is a historical account on the development of this weir type, along with a discussion of pros and cons, by which engineers have to face this design. The biographies of the most important individuals having participated in the advance of the labyrinth weir are also shortly presented.