was performed on short segments of between five and ten uniform waves to develop 

 clear relationships between wave parameters and armor motion. 



The primary study was conducted in a 46-m long by 0.46-m wide by 1 -m 

 deep flume, with an offshore slope of 1V:30H (Figure 2.1). A conventional rubble 

 mound cross section was constructed with various seaward slopes and armor types 

 (Figure 2.2). Table 2.1 lists the different test plans. In this thesis, only the sphere and 

 stone armor plans will be discussed (Test Plans 3 and 4) in order to maintain continuity 

 with the stone layer damage discussion in subsequent chapters. For Plans 3 and 4, 

 velocity measurements, sampled at 100 hz, were made throughout the water column 

 from the toe to two armor dimensions above the still water level. The ranges of physical 

 quantities and common dimensionless parameters for Plans 3 and 4 are listed in Table 

 2.2. 



Wave Gauge 

 Array 1 



6.9 m I 



X 



Toe of Slope 



Wave Gauge 

 Array 2 



o 



Wave Gauges^— -D 



y^ 



Structure 



""N 



ex. velocity 

 measurement location 



Wave Board 





32m 







Gauge 

 Array 1 " 1 



21 m 





Gauge 11 1 

 Array2 '1 ' 



— Tv^H 







Flat 





42.4 m 





Figure 2.1. Flume plan (top) and profile (bottom) views for incipient motion 

 experiment 



13 



