Canal retangular: escoamento normal
Depth
Flow
Width (b)
Roughness coefficient
Slope

Input data

Flow

Width (b)

Slope

Roughness coefficient (n)

Output data

Flow normal depth

Velocity

Description

Given the basic characteristics of a rectangular channel in uniform flow, this calculation determines the normal flow depth, flow rate, roughness coefficient nn, or slope.

Calculation modes:

  • Depth (y): Given the flow rate (QQ), width (bb), slope (II), and roughness coefficient (nn), calculates the normal flow depth and velocity.
  • Flow (Q): Given the depth (yy), width (bb), slope (II), and roughness coefficient (nn), calculates the flow rate and the U2/2gU²/2g relation.
  • Width (b): Given the depth (yy), flow rate (QQ), slope (II), and roughness coefficient (nn), calculates the width and the U2/2gU²/2g relation.
  • Roughness coefficient (n): Given the depth (yy), flow rate (QQ), slope (II), and width (bb), calculates the roughness coefficient and the U2/2gU²/2g relation.
  • Slope (I): Given the depth (yy), flow rate (QQ), width (bb), and roughness coefficient (nn), calculates the slope and the U2/2gU²/2g relation.

Rectangular channel

Input and output parameters table (Depth mode):

ParameterStandard UnitsDescription
Flow (QQ)m³/sFlow rate
Width (bb)mChannel width
Slope (II)-Channel slope
Roughness coefficient (nn)-Channel roughness coefficient
Normal flow depth (yy)mCalculated normal flow depth
Velocity (UU)m/sFlow velocity

References

  • SILVESTRE, Paschoal. Hidráulica geral. Rio de Janeiro, LTC, 1979.