@article{Jüstrich:7689,
      recid = {7689},
      author = {Jüstrich, Stefan and Schleiss, Anton J.},
      title = {Toe-scour formation at Piano Key Weir},
      publisher = {CRC Press},
      journal = {Labyrinth and Piano Key Weirs III – PKW 2017 ; Proceedings  of the 3rd International Workshop on Labyrinth and Piano  Key Weirs (PKW 2017), 22-24 February 2017, Qui Nhon,  Vietnam},
      address = {London. 2017-06},
      number = {CHAPTER},
      pages = {pp. 147-156},
      abstract = {Beyond their initial application on gravity dam crests as  an element of an auxiliary spillway, Piano Key Weirs (PKWs)  are more and more combined with weirs on rivers. Such  applications comprise the level rise for river hydropower  plants or to maintain a water level for inland navigation.  PKWs are ungated structures, so that the “operational” risk  is low. Furthermore, they have a hydraulic performant  rating curve and a low risk of driftwood blocking, as  compared to traditional weirs. Such a river application on  a loose riverbed requests a laborious foundation, given  that the structure is not directly built on rock or on dam  concrete as for spillways. A key parameter for the  stability of the PKW foundation is the ultimate scour-hole  depth at the PKW toe. Further, measures to reduce the  latter scour must be designed, as for instance a riprap  protection of the riverbed downstream of the PKW. This  paper reports of systematically conducted model experiments  on PKW scour, and gives some indications on the parameters  that are important to reduce the latter extend.},
      url = {http://arodes.hes-so.ch/record/7689},
}