Click the photograph for a enlarged view
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Physical Environment
Landscape
Plantation
Point is a wave cut rock platform made up of Wandrawandian siltstone (ANCA
1995). To the west is the township of Vincentia, to the south-east is Nelsons
Beach, then a number of rocky points before the small village of Hyams Beach.
Bathymetry &
Substrate
Currents, Winds and Waves
Studies
by Laxton & Laxton (1987b) indicate:
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the
effluent-seawater mixture formed a surface field and if the tide was high
enough, this surface field was carried onto the rock platform by breaking
waves. Diluted effluent would then drain from the rock platform back into
the sea at points close to the sandy beaches on either side of Plantation
Point.
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if the tide
was low and conditions calm, the effluent field would move around the down
wind edge of the rock platform and, during onshore breezes, towards either
of the beaches to the north or south of the point.
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during
offshore winds, the field would move eastwards. During onshore winds from
the north or north-east the diluted effluent field moved parallel to the
beach to the south of Plantation Point.
-
winds from
the south to south-east moved the field parallel to the shore along the
beach to the north of the point.
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