Table 1. Three-dimensional tests of plan 1 for two sets 

 of conditions at d = 25 feet (Carver, 1979). 



Gage 



No. 



Configuration 



60° 

 (ft) 



linear 

 C t 



75" 



H t 

 (ft) 



linear 

 C t 



Concave 



"t C t 

 (ft) 



Convex 

 H t C c 

 (ft) 









T = 



2.5 s, H t 



• 1.5 



ft 







1 



1.1 



0.73 



0.5 



0.33 



1.1 



0.73 



0.5 



0.33 



2 



0.5 



0.33 



0.4 



0.27 



0.6 



0.40 



0.9 



0.60 



3 



0.4 



0.27 



0.2 



0.13 



0.3 



0.20 



0.4 



0.27 



4 



0.9 



0.60 



0.8 



0.53 



0.8 



0.53 



0.3 



0.20 



5 



0.4 



0.27 



0.4 



0.27 



0.3 



0.20 



0.9 



0.60 



6 



0.5 



0.33 



0.5 



0.33 



0.3 



0.20 



0.4 



0.27 



7 



0.3 



0.20 



0.6 



0.40 



0.5 



0.33 



0.6 



0.40 



8 



0.3 



0.20 



0.2 



0.13 



0.3 



0.20 



0.4 



0.27 



9 



0.8 



0.53 



1.4 



0.93 



0.9 



0.60 



1.0 



0.67 



10 



0.6 



0.40 



0.4 



0.27 



0.5 



0.33 



0.8 



0.53 



11 



0.7 



0.47 



0.5 



0.33 



0.7 



0.47 



0.4 



0.27 



12 



0.6 



0.40 



0.3 



0.20 



0.3 



0.20 



0.5 



0.33 









T = 



3.5 s, ^ 



= 2.5 



ft 







1 



1.7 



0.68 



1.8 



0.72 



1.9 



0.76 



2.0 



0.80 



2 



1.7 



0.68 



1.9 



0.76 



2.3 



0.92 



2.2 



0.88 



3 



1.8 



0.72 



1.2 



0.48 



2.3 



0.92 



1.7 



0.68 



4 



2.0 



0.80 



1.9 



0.76 



2.1 



0.84 



2.5 



1.00 



5 



2.1 



0.84 



1.4 



0.56 



1.7 



0.68 



1.7 



0.68 



6 



1.9 



0.76 



1.7 



0.68 



2.0 



0.80 



2.2 



0.88 



7 



2.0 



0.80 



1.5 



0.60 



2.2 



0.88 



2.0 



0.80 



8 



2.1 



0.84 



1.3 



0.52 



1.9 



0.76 



1.8 



0.72 



9 



2.4 



0.96 



2.7 



1.08 



2.3 



0.92 



2.1 



0.84 



10 



1.8 



0.72 



1.5 



0.60 



2.0 



0.80 



2.2 



0.88 



11 



1.9 



0.76 



1.7 



0.68 



1.8 



0.72 



1.9 



0.76 



12 



1.8 



0.72 



1.5 



0.60 



2.1 



0.84 



1.8 



0.72 



even though the sections occasionally bumped each other, they were never 

 observed to violently collide. Relative to the 25-foot depth, the 10-foot 

 depth generally resulted in slightly lower transmitted wave heights, and the 

 75° linear configuration appeared to provide slightly better protection. A 

 summary of the various data" is presented in Figure 26. 



Separate and distinct three-dimensional model tests have been performed 

 at the U.S. Army Engineer Waterways Experiment Station (WES) to evaluate a 

 proposed single-pontoon floating breakwater system on Lake Pontchartrain, 

 Louisiana. The Seabrook Lock complex will be constructed on the south shore 

 of the lake at its junction with the Inner Harbor Navigation Canal. The 

 installation of a breakwater lakeward of the lock is proposed to provide wave 

 protection to the lock entrance. U.S. Array Engineer District, New Orleans, 

 requested that a hydraulic model investigation be conducted to (a) determine 

 wave conditions at the lock entrance with no breakwater protection, (b) deter- 

 mine the degree of protection afforded by the various proposed breakwater 



58 



