HORTON, PIPE HYDRAULICS, AND THE ATMOSPHERIC BOUNDARY-LAYER

Around the turn of the century, when Horton was conducting his famous weir experiments, in the same laboratory Saph and Schoder recorded som e pipe flow data that were to have a profound impact on the evolution of turbulent boundary layer theory. These, by way of Blasius's dimensi onal analysis, ultimately led Prandtl to derive the 1/7 power equation for the velocity profile; this in turn was the precursor of the logar ithmic equation. the cornerstone of all present-day similarity formula tions for the atmospheric boundary layer.