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Table 8

Relative significance of each of input parameters of the best models for each channel

Channel typeEliminated variablePerformance criteria for test series
RMSEΔRMSE%
Rectangular channel with strip elements Fr1, (h2 − h1)/h1, W/Z 0.049 – 
Fr1 0.106 116.327 
(h2 − h1)/h1 0.062 26.531 
W/Z 0.055 12.245 
Rectangular channel with staggered elements Fr1, (h2 − h1)/h1, W/Z 0.055 – 
Fr1 0.096 103.636 
(h2 − h1)/h1 0.070 27.273 
W/Z 0.062 12.727 
Trapezoidal channel with strip elements Fr1, (h2 − h1)/h1, W/Z 0.072 – 
Fr1 0.108 101.389 
(h2 − h1)/h1 0.073 1.389 
W/Z 0.082 13.889 
Expanding channel with central sill Fr1, (h2 − h1)/h1 0.024 – 
Fr1 0.081 237.500 
(h2 − h1)/h1 0.046 58.333 
Channel typeEliminated variablePerformance criteria for test series
RMSEΔRMSE%
Rectangular channel with strip elements Fr1, (h2 − h1)/h1, W/Z 0.049 – 
Fr1 0.106 116.327 
(h2 − h1)/h1 0.062 26.531 
W/Z 0.055 12.245 
Rectangular channel with staggered elements Fr1, (h2 − h1)/h1, W/Z 0.055 – 
Fr1 0.096 103.636 
(h2 − h1)/h1 0.070 27.273 
W/Z 0.062 12.727 
Trapezoidal channel with strip elements Fr1, (h2 − h1)/h1, W/Z 0.072 – 
Fr1 0.108 101.389 
(h2 − h1)/h1 0.073 1.389 
W/Z 0.082 13.889 
Expanding channel with central sill Fr1, (h2 − h1)/h1 0.024 – 
Fr1 0.081 237.500 
(h2 − h1)/h1 0.046 58.333 
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