STM Journals Peer-reviewed research from Consortium e-Learning Network

Journal of Water Resource Engineering and Management

Experimental Investigation of Influence of Key-shape Variation on Discharge Capacity of Piano Key Weir

  1. Vinodray D. Ujeniya

Abstract

The piano key weir is a nonlinear free flow type weir with small foundation width. There are many geometrical parameters which influence the discharge capacity of the piano key weir. As in Labyrinth weir, the piano key weir is zigzagged in a plan to increase the crest length. Overhanging on both sides reduces the foundation width of such weir. To investigate the effects of key-shape variation of piano key weirs on flow capacity of piano key weir, laboratory experiments were performed on the models in the laboratory. Each model was tested at various discharges, flow depths were measured on the upstream and downstream side for the purpose. Experimental results depict the influence of the crest length magnification ratio and key width ratio of the discharge capacity.
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