Figure 8. 



Depth-averaged current vectors along each transect for 

 30 September 1997 



Field-data collection was during a period of higher than average high water 

 for Lake Huron. Water levels are typically higher during the spring/summer, and 

 from July when the SHOALS survey was flown through September/October when 

 the field-data collection was conducted, lake levels were approximately 0.6 m 

 (2 ft) above the long-term average. This means that average currents at 

 Port Huron are probably less (and subsequent sediment-transport capacity lower) 

 than that measured. In addition, the depths inside the boat basin are larger than 

 would be expected for an average year without dredging. 



Sediment Samples 



Sediment samples were collected on 1 October 1997 north of the boat basin 

 (beach and nearshore), inside and outside of the boat basin, and in the areas east 

 and south of the basin. Figure 12 shows the 58 sample locations with D50 grain 

 size. All subaqueous samples were collected with a clamshell sampler deployed 



14 



Chapter 3 Field-Data Collection 



