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Table 1

Models and prototype design parameters and dimensions

Design elementsPrototype dimensionsModel dimensions
Curve axis model Scale 1:50Straight axis model Scale 1:75
Convergence angles (°) 120 sym 120 sym 90 sym 90 asym 60 sym 60 asym 120 sym 90 sym 60 sym 
(⁠⁠) 5.56 5.565 4.467 3.836 3.469 2.999 4.667 3.946 3.211 
Crest length, L (m) 42 0.837 0.712 0.628 0.578 0.51 0.56 0.4735 0.3853 
Design discharge (m3s−1) 398 0.0225 0.0182 0.0183 0.0158 0.01404 0.0059 0.0054 0.0048 
Maximum discharge (m3 s−1) 717 0.0405 0.0344 0.0304 0.028 0.0247 0.0146 0.01245 0.01005 
Maximum head (m) 5 0.1 0.0667 
Spillway height (m) 7.8 0.156 0.104 
Design head (m) 3 0.06 0.04 
Downstream channel width (m) 9 0.18 0.12 
Design elementsPrototype dimensionsModel dimensions
Curve axis model Scale 1:50Straight axis model Scale 1:75
Convergence angles (°) 120 sym 120 sym 90 sym 90 asym 60 sym 60 asym 120 sym 90 sym 60 sym 
(⁠⁠) 5.56 5.565 4.467 3.836 3.469 2.999 4.667 3.946 3.211 
Crest length, L (m) 42 0.837 0.712 0.628 0.578 0.51 0.56 0.4735 0.3853 
Design discharge (m3s−1) 398 0.0225 0.0182 0.0183 0.0158 0.01404 0.0059 0.0054 0.0048 
Maximum discharge (m3 s−1) 717 0.0405 0.0344 0.0304 0.028 0.0247 0.0146 0.01245 0.01005 
Maximum head (m) 5 0.1 0.0667 
Spillway height (m) 7.8 0.156 0.104 
Design head (m) 3 0.06 0.04 
Downstream channel width (m) 9 0.18 0.12 
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