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The mean percentage error MPE Qsim for all the considered cross-sections, as shown in Table 2, ranges between 0 and 5% for Qsim1 and 0 and 2% per Qsim2 (corresponding to R2 equal to 0.992 and 0.995, respectively). In light of this result, both Equations (17) and (19) can be deemed particularly reliable in discharge estimation when a good dataset, consisting of several velocity measurements over the whole flow area, is available.

Table 2

MPE Qsim of the discharges Qsim1 and Qsim2 obtained from the set of velocity data S1 for the cross-sections examined

 Set S1
MPE Qsim1 [%]MPE Qsim2 [%]
Ponte Nuovo 4.80 2.36 
Santa Lucia 3.64 3.56 
Pontelagoscuro 5.18 3.84 
Ohio 0.27 0.14 
Allegheny 0.18 1.61 
Monongahela 1.86 2.29 
 Set S1
MPE Qsim1 [%]MPE Qsim2 [%]
Ponte Nuovo 4.80 2.36 
Santa Lucia 3.64 3.56 
Pontelagoscuro 5.18 3.84 
Ohio 0.27 0.14 
Allegheny 0.18 1.61 
Monongahela 1.86 2.29 

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