Flow measurement or hydraulic formulas are used to measure the discharge/volume of water through canals,irrigation channels,watercourses,drain lines etc. Following is the brief descripion used to calculate the flow measurement or discharge of the trapezoidal sectioned channel.
b = bottom width d = flow depth
B = width at water surface = b + ( 2 x z x d ) FB = Free board
D = Total depth of channel = d + FB BW = Bank width
Z = Side slope, ( Such as 1: 1 - 1.5 : 1 & 2 : 1) FSL = Full supply level
TW = total width of the ditch = b + ( 2 x Z x D)
So formula for trapezoidal channel flow quantity is
A = b x d + Z x d²
For more Detail and in figure detail click here
b = bottom width d = flow depth
B = width at water surface = b + ( 2 x z x d ) FB = Free board
D = Total depth of channel = d + FB BW = Bank width
Z = Side slope, ( Such as 1: 1 - 1.5 : 1 & 2 : 1) FSL = Full supply level
TW = total width of the ditch = b + ( 2 x Z x D)
So formula for trapezoidal channel flow quantity is
A = b x d + Z x d²
For more Detail and in figure detail click here
