APPENDIX C 



LEO SUMMARY REPORT 



Annual siiiranaries of the monthly averages o£ breaker height, period, 

 and type; net and gross longshore current velocities; foreshore slope; 

 and percent occurrence and spacing of rips and cusps at the three 

 localities are given in Tables C-1 to C-15. 



All breaker direction observations were standardized to the protrac- 

 tor method. Perpendicular to the shoreline is defined as the 0° approach 

 angle; i.e., breakers are approaching normal to the shoreline. Breakers 

 approaching from the right of 0°, as the observer faces the shoreline, 

 are noted as negative; those approaching from the left as positive. 

 Breaker direction is given as percentage occurrence in range of degrees. 



Longshore current speeds are given in terms of gross and net mean 

 rates. The gross mean, Cg, which represents the total of the speeds 

 measured, defined as: 



^Cg + C/y) 



% " n ' 



where C^ and Cyy represent currents flowing to the south and the north, 

 respectively. Both C^' and C^ are added as absolute values. The net 

 mean longshore current. Cm, a cumulative number with assigned mathe- 

 matical direction, is defined as: 



^pj - %) 



^yn 



Thus, net speeds are listed as either negative or positive means, where 

 negative mean values indicate a net current speed to the north, positive 

 mean values to the south. Rip current and beach cusp spacings are in feet. 



