b(n-l) 



INITIAL 

 POINT 



1,2,3, n 



bi,b2,b3, bn 



^1'^2'^3' ^n 



EXPLANATION 



Observation Points 

 Dtstance from the Initial 



Point to the Observation Point 

 Depth of Water at the 

 Observation Point 



where 



where 



or 



or 



where 



COMPUTATIONS 



Q=E ^i 



i=1 



_ f biti-bi-i "| , 

 qi = V, [ — 5 Jdi 



V: = V 



*^'2d*^'8d^2v,^)/4 



2d^%,'^2 



I 



6d 



V = mean velocity in section i 



2d 



.6d 



8d 



measured velocity at 0.2d below the water surface 

 = measured velocity at 0.6d below the water surface 

 measured velocity at 0.8d below the water surface 



Figure H-5. Discharge measurement technique. 



152 



