Excess dimensionless shear stress is a nondimensional measure of bed shear stress about the threshold for motion .
Bed load transport rates are usually expressed as being related to excess dimensionless shear stress raised to some power .
Excess dimensionless shear stress is a nondimensional shear stress of bed shear stress about the threshold for motion .
Bed load transport rates are usually expressed as being related to excess dimensionless shear stress raised to some power .