CURRENT VELOCITY 
3 
FT. 
FT. 
PER 
PER 
PER 
PER 
PER 
PER 
SEC. 
SEC. 
SEC. 
SEC. 
SEC. 
SEC. 
LAKES AND RESERVOIRS 
INLAND RIVERS 
5 10 1S 20 25 
PERCENT 
DISTRIBUTION OF SURVEYS FOR VARIOUS CONDITIONS-ALL DISTRICTS 
FIG. | 
