Currents and related problems at Metropolitan Beach, Lake St. Clair / John C. Ayers.

taken to mean that alongshore currents along the Beach property
under southeast winds are eroding the shore of the cove and the
north side of the shoal. These currents are then turned southward by the shoreline west of the cove and drop the eroded sediments on the shoal and on its southward extension.
The shape of the shoal indicates the long-period dominance
of 1) sedimentation from currents coming from the west and 2) of
sedimentation from currents coming from the north-. All the evidences discussed earlier in this section are compatible with the
conclusions drawn from the underwater topography.
Also from the underwater topography, and also indicating
scour under southeast winds, is the success of the Black Creek
extension channel, which has not sanded in.
On the basis of -all the evidence, it is believed that any
dredged channel extending from the beachline into the lake should
be angled from the beachline in the same direction as the extension channel off Black Creek. This-angle would take advantage
of the scour under southeast winds that is indicated by the
shapes of the 1-6 foot contours north of the shoal. Figure 29
shows the suggested channel.
To take advantage of channel scour under southeast wind is,
however to have sand moving toward shore in the channel. To
avoid this sand being forced into the Lagoon, it is suggested
that a 900 angle between the Lagoon's channels and the offshore
channel be created to prevent sanding-in-of the Lagoon. The
Lagoon channels shown on the Master Plan of March 1961 are marked
A and B in Figure 29; alternative suggested channels are marked
C and D.

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