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Experimental studies by Elevatorski (2008), Wu & Rajaratnam (1996) and Ranga Raju et al. (1980) revealed that hydraulic jump characteristics only depend on Froude number, and Reynolds number has no significant impact on the prediction of hydraulic jump characteristics. Also, Hager (1992) showed that the length of hydraulic jump depends on the height of jump and Froude number. Therefore, in this study, based on upstream hydraulic data and geometric data, the models of Table 3 were considered for modeling hydraulic jump characteristics of sudden diverging basins.

Table 3

SVM developed models

Output variableModelInput variable(s)
Sequent depth ratio h2/h1 S(I) F₁ 
S(II) F₁, h₁/B 
S(III) F₁, S/h1 
S(IV) F₁, B 
Length of hydraulic jump Lj/h1 L(I) F₁ 
L(II) F₁, (h₂–h1)/h₁ 
L(III) F₁, h₂/h₁ 
L(IV) F₁, S/h1 
L(V) F₁, B 
Loss of energy EL/E1 E(I) F₁ 
E(II) F₁, h₁/B 
E(III) F₁, S/h1 
Output variableModelInput variable(s)
Sequent depth ratio h2/h1 S(I) F₁ 
S(II) F₁, h₁/B 
S(III) F₁, S/h1 
S(IV) F₁, B 
Length of hydraulic jump Lj/h1 L(I) F₁ 
L(II) F₁, (h₂–h1)/h₁ 
L(III) F₁, h₂/h₁ 
L(IV) F₁, S/h1 
L(V) F₁, B 
Loss of energy EL/E1 E(I) F₁ 
E(II) F₁, h₁/B 
E(III) F₁, S/h1 

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