RCPWAVE / GENESIS baseline 



STA 11 

 (5NM GRID) 



(101m) ° 1600 ° FT 



Figure 2. Wave transformation hindcast stations to RCPWAVE grid 



After transforming the hindcast wave estimates, potential longshore sand 

 transport rates were calculated for the various shoreline orientations within 

 the project reach. These potential transport rates are presented in the form 

 of a total littoral drift rose (Walton and Dean 1973) in Figure 3. Three 

 curves are given in Figure 3. The curve with the circular symbols represents 

 the average downcoast littoral drift for the 20-year northern hemisphere 

 hindcast of sea and swell wave conditions and the curves with the "x" and 

 triangular symbols represent the average upcoast littoral drift for the 

 available two years of southern hemisphere swell wave estimates. It is 

 interesting to note that there is a reversal in the direction of the average 

 net longshore littoral drift and that this reversal occurs at different 

 shoreline orientations depending on the time series of southern swell wave 

 conditions used in the calculation. 



73 



