1.13 m (3.7 ft) along the existing dock (Gauge 5) all for 9.2-sec, 3.02-m (9.9-ft) 

 waves with the +1.07-m (+3.5-ft) swl and no flow conditions. For the 59 deg 

 direction, maximum wave heights were 2.13 m (7.0 ft) in the harbor entrance and 

 1.25 m (4.1 ft) in the southwest portion of the harbor for no flow conditions; 

 1.04 m (3.4 ft) in the northwest portion of the harbor for both no flow and 

 riverflow conditions; and 1.8 m (5.9 ft) along the existing dock with riverflow 

 conditions all for 7.0-sec, 2.68-m (8.8-ft) waves with the +1.07-m (+3.5-ft) swl. 

 For 1.22-m (4.0-ft) waves (which occur relatively frequently), wave heights 

 ranged from 0.49 to 0.67 m (1.6 to 2.2 ft) in the harbor entrance; 0.40 to 0.61 m 

 (1.3 to 2.0 ft) in the southwest portion of the harbor; 0.27 to 0.46 m (0.9 to 1.5 ft) 

 in the northwest portion of the harbor; and 0.55 to 0.91 m (1.8 to 3.0 ft) along the 

 existing dock for the 11 deg direction. For the 59 deg direction, 1.22-m (4-ft) 

 incident waves resulted in wave heights ranging from 1.10 to 1.31 m (3.6 to 

 4.3 ft) in the harbor entrance; 0.98 to 1.19 m (3.2 to 3.9 ft) in the southwest 

 portion of the harbor; 0.49 to 0.64 m (1.6 to 2.1 ft) in the northwest portion of the 

 harbor; and 0.82 to 1.04 m (2.7 to 3.4 ft) along the existing dock. 



The general movement of tracer material and subsequent deposits for repre- 

 sentative waves from 11 deg are shown in Photos 1-8 for existing conditions. 

 Sediment was introduced along the shoreline north of the harbor. These experi- 

 ments entailed exposing the tracer material to 6-sec, 1.22-m (4.0-ft) waves for 

 40 min (model time) and then to 7.9-sec, 2.07-m (6.8-ft) waves for 5 min and 

 were conducted for both swls as well as both riverflow and no flow conditions. In 

 general, tracer material moved southerly along the shoreline and around the north 

 breakwater where it deposited in the entrance channel. Some material then 

 migrated into the harbor. The placement of tracer material prior to experiments 

 from 59 deg is shown in Photo 9, and the general movement of tracer and 

 subsequent deposits for representative waves from 59 deg are shown in Photos 10- 

 17. For these experiments, tracer material was exposed to 5-sec, 1.22-m (4.0-ft) 

 waves for 10 min and then 6-sec, 1.86-m (6.1-ft) waves for 5 min. Experiments 

 were conducted for both riverflow and no flow conditions and for both swls. 

 Tracer material moved southerly around the north breakwater and deposited in the 

 entrance channel where some of it migrated into the harbor. 



Current patterns and magnitudes obtained for existing conditions are 

 presented in Photos 18-33 for representative wave conditions for the 11 and 

 59 deg directions and for no flow and riverflow conditions. For all conditions, 

 currents moved southerly along the shoreline past the harbor and created eddies in 

 the harbor entrance. Maximum velocities were as follows: 



Wave 

 Direction 



swl, m (ft) 



Riverflow 



Maximum Velocities, mps (fps) || 



North of 

 Harbor 



Lakeward of 

 Harbor 



South of 

 Harbor 



11 deg 



+0.52 (+1.7) 



No 



0.98 (3.2) 



0.98 (3.2) 



1.01 (3.3) 







Yes 



1 .07 (3.5) 



1 .28 (4.2) 



1.16(3.8) 





+ 1.07 (+3.5) 



No 



0.76 (2.5) 



0.91 (3.0) 



0.88 (2.9) 







Yes 



1 .34 (4.4) 



1 .68 (5.5) 



1.22(4.0) 



59 deg 



+0.52 (+1.7) 



No 



0.88 (2.9) 



1.01 (3.3) 



0.82 (2.7) 11 







Yes 



0.76 (2.5) 



1.04(3.4) 



0.98 (3.2) 





+1.07 (+3.5) 



No 



0.94(3.1) 



1.10(3.6) 



1.13(3.7) 







Yes 



0.73 (2.4) 



1.16(3.8) 



1 .04 (3.4) 



44 



Chapter 6 Physical Model 



