cross-sectional profile. Additional profile measurements collected 

 higher up on the banks will correct this problem, if deemed necessary. 



r 2 values 



If the r 2 value for a stage-discharge rating curve is less than 

 approximately 0.90, the cross-section should be eliminated from the 

 analysis. Low r 2 values may be due to errors, so recheck the stage and 

 discharge measurements before eliminating these cross-sections. For 

 those cross-sections having only two sets of stage-discharge 

 measurements (remember, this practice is not recommended), r 2 values are 

 automatically 1.000 and consequently of no use in assessing the 

 reliability of the hydraulic predictions. 



6-3 



