V. SUMMARY 



This report presents a technique for estimating the wind-wave runup 

 distribution on structures by extending the traditional method of runup 

 prediction for regular waves developed in the SPM (Sec. 7.21). The 

 technique assumes that the runup has a Rayleigh distribution of the type 

 commonly observed for wave heights. Application of the technique to both 

 plain and compound slopes is shown by example design problems and appears 

 to give conservative but reasonable estimates of the runup distribution. 

 In situations where the offshore slope and depth cause the larger waves 

 to break offshore, the elevations predicted by the technique appear to 

 become increasingly more conservative as the percent exceedance becomes 

 smaller. As a practical guide for this type of situation, the runup will 

 probably not exceed elevations of about 1.4 to 1.5 R s . 



A method of correcting the influence of slope roughness and porosity 

 on wave runup, which is easier to apply than the SPM method, is also 

 presented. 



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