(ft/s) 
Uy, FLUME VELOCITY 
OLS) 
0.8 
OL 
0.6 
Sq = 0.0885 U,+ 0.0557 
0:5 
0.4 
OS 
©1877 = .O109 0. | O.) | 0.12 OAS 0.14 
Sy — VERTICAL COMPONENT OF TURBULENT VELOCITY 
FLUCTUATIONS AT THE CREST OF THE BED ROUGHNESS 
ELEMENTS (ft/s) 
Figure 27. Base vertical turbulent velocity scale versus flume 
velocity for a constant amplitude = 0.925 foot. 
63 
