the functional performance of the revetment. Often, on a revetment with a low 

 crest elevation, the overtopping flow will cause erosion which is a problem in 

 itself; but the erosion also can jeopardize the integrity of the entire revet- 

 ment. A properly designed revetment, with carefully constructed filter and 

 splash aprons, can probably survive moderate overtopping; but in some in- 

 stances the revetment might need to be a free standing structure with an 

 appropriate drainage channel. An effective strategy for reducing the runup 

 and overtopping on low-crested revetments would greatly improve their func- 

 tional performance. The strategies to be investigated for this type of revet- 

 ment will be the use of additional armor stone, berms, and parapets. 



36 



