Which of the following is NOT directly calculated using shear velocity?

Fluid density is not directly calculated using shear velocity. While shear velocity is crucial for understanding flow characteristics near boundaries, estimating bed shear stress, erosion potential, sediment transport rate, and characteristics of turbulent flow, it does not provide information necessary to calculate the density of a fluid. Fluid density is an inherent property of the fluid itself, determined by its composition and temperature, rather than its flow characteristics or interaction with surfaces.