U (+ 10 of wind vector directed in either direction 

 ^ along trend of shoreline) 



Ug (+ 10 of wind vector directed parallel to longshore- 

 current flow^ and in the same direction) 



JJ^ values ranged from 0.00 to 16.OO M.P.H. 



Uof values ranged from 0.00 to 3^.00 M.P.H. 



Uqj^ values ranged from 0.00 to 26,75 M.P.H. 



Up values ranged from 0.00 to 17-50 M.P.H. 



Ug values ranged from 0.00 to I8.OO M.P.H. 



V 



Mean Velocity of Longshore Current 



The current velocity and direction was measured four times daily by 

 timing the movement of 2 or 3 fluorescene dye patches moving over (usually) 

 a 100-foot distance. Values used in the analyses are absolute values^ a 

 zero-velocity value representing either a no-current condition or a rip- 

 current condition. 'Values used ranged from 0.00 to 3-20 feet per second. 



a 



Angle of Wave Approach 



The angle of wave-front approach of the dominant wave train as 

 measured with a pelorus in a zone 1000 to 13OO feet from shore in water 

 depths of 2O-26 feet. Measurements were made k times daily. Values used 

 in this study were absolute values only and ranged between 2 and 75 degrees. 



Rate of Rise of Still-water Level 



The instantaneous rate of rise of the tide^ in hundredths of feet 

 per hour, as determined from observed times and magnitudes of high and 

 low water. Values used ranged from 0.00 to O.67 feet per hour, and were 

 computed for the mid-points of the 6 lag periods. Because times of low 

 tide in nature did not always coincide with anticipated times ("R, " fig. 

 2), the x\y. and t]^ computations sometimes resulted in values for rising 

 tide during a lag period when it should only have been falling, or vice 

 versa. 



62 



