Figure 7. ADCP current transects 



Near-bottom velocity vectors along each transect are shown in Figures 1 and 

 1 1 . The velocities are taken from the ADCP reading closest to the bottom. On 

 average, this depth was approximately 0.3 to 0.6 m (1 to 2 ft) above the actual 

 bottom. Comparing Figures 1 and 1 1 with Figures 8 and 9, one can see how the 

 bottom velocities compare with overall depth-averaged velocities. Bottom depths 

 at each location along the transects shown in Figures 1 and 1 1 can be inferred 

 from the SHOALS bathymetry survey in Figure 5. 



As expected, the bottom-velocity magnitudes were smaller than the depth- 

 averaged magnitudes, with velocities less than 0.61 mps (2 fps) at some locations 

 for Transect 1 . Transects 2 and 3 had bottom velocities around 1 .2 mps (4 fps). 

 Transects 2, 3, and 4 all show velocity vectors in the southwest direction probably 

 indicative of a flow split around either side of the high-relief area discussed above 

 in the SHOALS bathymetry section. 



Chapter 3 Field-Data Collection 



13 



