Samsung Galaxy Tab Active SM-T360 Operation Manual page 22

Mid Section Method (From Australian Standard AS3778.3.1
The cross section is again regarded as being made up of a number of segments, however in the
mid section method each segment is bounded by the midpoint of two verticals.
The discharge of each segment is calculated as :
Discharge = Mean velocity x Depth of x
of Segment
where
Mean Width
Between Verticals
The total discharge is obtained by adding the discharge from each segment.
25-Feb-15 Issue 1.00
HS reserve the right to modify this document at any time
Hydrological Services – HydroTablet
of Vertical
q = v1 x d1 x (b0+b1)/2
1
q = v2 x d2 x (b1+b2)/2
2
q = v3 x d3 x (b2+b3)/2
3
= sum of widths to
adjacent verticals
= (b2 + b3)
+ .........
q = q + q + q
(total) 1 2 3
Page 22 of 22
ISO 748)
Mean Width
Vertical between Verticals
etc....
/ 2
/ 2
©Hydrological Services P/L