SYMBOLS AND DEFINITIONS 
exponential decay rate of the velocity scale 
sediment concentration 
calibration nozzle coefficient 
sediment concentration at the base elevation 
representative roughness diameter 
water depth 
sediment exchange coefficient 
output voltage of hot-film bridge 
output voltage of hot-film bridge with sensor in still water 
acceleration due to gravity 
crest-to-trough wave height 
output voltage of photoelectric cell 
output voltage of photoelectric cell for ambient light 
output voltage of photoelectric cell with light beam passing 
through clear water 
constant of proportionality between directional components of 
turbulent velocity fluctuations 
wave number 
amplitude of flume oscillation 
length of surface wave 
length scale for oscillating and unidirectional flow 
exponential decay rate of sediment concentration of oscillating 
flow 
Manning's roughness coefficient 
hydraulic radius 
horizontal oscillating velocity 
