In terms of the significance of establishing mega hydraulic structures, while avoiding their serious implications at the Down Stream “D.S.”, this study was initiated with the objective of assessing downstream Velocity Distribution “VD” of different shapes of Labyrinth Weirs “LW”, in terms of its head, crest level and discharge, experimentally. Predominantly, literature about hydraulic structures was analyzed. An experimental program (60 experiments) was designed. It considered different weir shapes (i.e. linear weir and 4 apex angle (i.e. 20, 45, 60 so as 80o), where the weir crest height was altered (i.e. 30, 35 and 40 cm). A laboratory flume was set and measuring facilities were mounted along it. Miniatures were fabricated and an experimental scheme was designed. Also, discharges were altered (i.e. 200, 150, 100 and 50 l/s). Measurements were attained and results were plot on graphs. The research results accentuated that trapezoidal weir angle of 45 and 60o achieved the optimum VD. However, the results stressed that 60o weir provided superior scour values and VD. The results specified that reducing crest level enhanced both scour and VD. |
