CE Case 300 



Elapsed Time (hr) 



Figure 40. Decay of peak offshore sand transport rate 

 and a best-fit empirical predictive expression 



Peak onshore transport 



331. The same analysis as for the peak offshore transport rate was 

 carried out for the peak onshore rate, which encompassed 13 cases with strong 

 onshore transport conditions. Figure 41 shows time decay of the peak onshore 

 transport rate for the CE experiments. Similar to the behavior of the peak 

 offshore rate, the initial peak onshore transport rate decayed rapidly, when 

 the profile was far from its equilibrium shape, and then more slowly at the 

 end of the run. Equation 20 was used to obtain an empirical expression to 

 describe the decay with time by least-squares fitting. Figure 42 shows the 

 agreement for a typical case (Case 101) between the peak onshore transport 

 rate calculated from the profile surveys and Equation 20 (solid line). In 

 this case also the regression equation explained over 90 percent of the total 

 variation. 



134 



