PART V: CONCLUSIONS AND RECOMMENDATIONS 



22. Visual observations of the maximum runup of irregular waves on rip- 

 rap give reliable values of the maximum elevation of wave uprush. For the two 

 studies considered the time interval of observation was 256 sec. It is diffi- 

 cult for an observer to maintain adequate concentration on the runup process 

 for intervals longer than 256 sec. This interval provides between 100 and 

 250 runup events at the wave periods tested. Future tests will consider using 

 photogrametric methods to measure irregular wave runup on riprap to increase 

 the time interval of observation and to obtain the entire runup distribution 

 rather than just the maximum value. 



23. The runup equations presented appear to be the best available to es- 

 timate the approximate upper limit of irregular wave uprush on riprap revet- 

 ments. Further tests are planned which should produce improved methods to 

 determine the runup characteristics of irregular waves on rough and porous 

 slopes. 



26 



