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The Wetted Rack Length of the Tyrolean Weir

Author(s): Helmut Bir; Volker Kienberger; Norbert Krouzecky

Linked Author(s): Norbert Krouzecky

Keywords: Tyrolean Weir; Water-intake; Model tests

Abstract: The Tyrolean Weir–a submerged weir with horizontal or inclined trash rack was developed as a water-intake from mountain torrents. For design it is important to know the wetted rack length. To find this parameter depending on specific discharge, inclination of the rack and width of the bar-gaps experiments were performed at the hydraulic laboratorium of the University of Technology, Vienna. Experimental results were compared with theoretical calculations. Examinations of waterdistribution along the rack occurred to ascertain the loss of water in case of a too short rack. It is advantageous to overdimension the rack rather than a restrained design.


Year: 1999

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