Typical wave patterns obtained for Plan 10 also are shown in Photos 137-152. 



Results of vessel-wake experiments for Plan 10 are presented in Table 15. 

 Similar to existing conditions and Plan 9, the smaller 27-m (90-ft) vessel moving 

 at the greatest speed (15 knots) produced the largest waves in the harbor. 

 However, in converse to existing conditions and similar to Plan 9, maximum 

 waves occurred as the vessel was leaving the St. Clair River (as opposed to the 

 vessel entering the river). Views of the model vessels leaving the St. Clair River 

 and their resulting wakes are shown in Photos 153-156. 



Results of wave-height experiments for Plans 11-16 are presented in Table 16 

 for representative waves from 11 deg with the +1.07-m (+3.5-ft) swl and no flow 

 conditions. Maximum wave heights obtained for 7.9-sec, 2.07-m (6.8-ft) waves 

 were 0.67, 0.73, 0.61, 0.52, 0.55, and 0.67 m (2.2, 2.4, 2.0, 1.7, 1.8, and 2.2 ft) in 

 the harbor entrance (Gauge 1); 0.49, 0.40, 0.34, 0.30, 0.30, and 0.34 m (1.6, 1.3, 

 1.1, 1.0, 1.0, and 1.1 ft) in the southwest portion of the harbor (Gauge 3); 0.37, 

 0.37, 0.30, 0.37, 0.30, and 0.37 m (1.2, 1.2, 1.0, 1.2, 1.0, and 1.2 ft) in the 

 northwest portion of the harbor (Gauge 4); and 0.43, 0.37, 0.34, 0.37, 0.34, and 

 0.37 m (1.4, 1.2, 1.1, 1.2, 1.1, and 1.2 ft) along the existing dock (Gauge 5) for 

 Plans 11-16, respectively. For 6-sec, 1.22-m (4.0-ft) waves, maximum wave 

 heights were 0.21, 0.24, 0.24, 0.21, 0.24, and 0.21 m (0.7, 0.8, 0.8, 0.7, 0.8, and 

 0.7 ft) in the harbor entrance; 0.18, 0.12, 0.12, 0.12, 0.12, and 0.12 m (0.6, 0.4, 

 0.4, 0.4, 0.4, and 0.4 ft) in the southwest portion of the harbor; 0.15, 0.18, 0.15, 

 0.15, 0.15, and 0.18 m (0.5, 0.6, 0.5, 0.5, 0.5, and 0.6 ft) in the northwest portion 

 of the harbor; and 0.27, 0.21, 0.21, 0.18, 0.27, and 0.18 m (0.9, 0.7, 0.7, 0.6, 0.9, 

 and 0.6 ft) along the existing dock. 



Discussion of experimental results. Results of wave-height experiments for 

 existing conditions revealed rough and turbulent waves in the existing harbor. 

 Very confused wave patterns were observed because of reflected wave energy off 

 the vertical walls in the harbor. Wave heights in the harbor were 1.19 m (3.9 ft) 

 for typical storm-wave conditions (1.22-m (4.0-ft) incident waves) and 1.8 m 

 (5.9 ft) for extreme storm-wave conditions (2.68-m (8.8-ft) incident waves). 

 Maximum wave heights in the harbor generally occurred for waves from 59 deg 

 with the higher +1.07-m (+3.5-ft) swl and riverflow conditions. It was noted, 

 however, that waves from 1 1 deg were larger in the harbor for no flow conditions. 



The 11 deg direction is predominant since about 91 percent of wave 

 occurrences are from this direction. 



Sediment-tracer results for existing conditions indicated that wave action will 

 move sediment southerly around the north breakwater and into the harbor entrance 

 v^dth some migrating into the harbor. These patterns and subsequent deposits 

 occurred for every experimental wave series for both the 1 1 and 59 deg directions, 

 both the +0.52-m (+1.7-ft) and +1.07-m (+3.5-ft) swls, and both riverflow and no 

 flow conditions. 



Chapter 6 Physical Model 57 



