# Shear stress (acting on the bed of a channel)

## Description

For a channel that is at an angle **a** from horizontal, the shear component of the stress acting on the bed , which is the component acting tangentially to the bed, equals the total pressure times the sine of the angle **a**

## Variables

τ_{b} | Shear stress on the bed (Pa) |

ρ | Density of the fluid (kg/m^{3}) |

g | Standard gravity |

h | Depth of the flow (m) |

α | Angle of the channel from the horizontal (degrees) |