Studies on water movements and sediments in Southern Lake Michigan : part 1[-3] ... / by John C. Ayers.

recovered on 28 October at 1401 at 42~55-3, 86~014.5, about
two miles 3170 true from the channel at Port Sheldon. From release to recovery this drogue moved 16.8 miles in 28 hours 27
minutes for an overall indicated speed of 0.59 mph. Between
the intermediate and final positions this drogue moved 15.2
miles at an indicated rate of 0.7 mph.
The regime of winds applicable to this run was:
26 Oct. SSW 8-12 knots
27 Oct. S 8-13 k
28 Oct. NW 18-23 k
BT and drogue run, 29 October 1963, at USPHS Buoy 2O
ig 1 This section presents a comparison of currents
obtained by dynamic computation to currents indicated by surface drogues. The drogue run has been reported previously in
Part I of this Final Report.
To enable comparison to the computed currents, the normal
components of the movements of adjacent drogues have been
averaged and the average plotted between the drogue positions.
The comparison is hampered by the fact that higherwindage floats had to be used on half the drogues. The averaging process included a higher-windage drogue in each pair.
The comparison would have been further facilitated if the
bathythermograph soundings had been in between the drogues.
Each computed current component would then have been directly
comparable to the normal component of the movement of a single
drogue.
While the mechanics of the comparisons leave a good deal
to be desired, there was at least directional agreement in
five of the nine comparisons. In three of the four remaining

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