CGRG Bibliography of Canadian Geomorphology
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Author : Graham, M.; and Davidson-Arnott, R.
Date : 2005.
Title : Shoreline change and sediment transport patterns in the vicinity of Pointe-aux-Pins, Lake Erie: Implications for past and future evolution.
Publication : Proceedings of the 12th Canadian Coastal Conference. Dartmouth, Nova Scotia. November 6-9, 2005.
Issue :
Page(s) :
Abstract
Pointe-aux-Pins is a large, sandy foreland located about midway along the north shore of Lake Erie, enclosing Rondeau Bay. It has been suggested that it formed from the convergence of two littoral cells with sediment being supplied alongshore from both the east and the west. Patterns of erosion and accretion along the shoreline in the vicinity of the barrier were determined by comparison of shoreline positions on rectified vertical aerial photographs taken in 1959 and 1995 and verified by field observations in 2004. The results show erosion of the bluffs to the west with accretion in the form of a filet beach at the Erieau breakwater at the western edge of the entrance to Rondeau Bay. On the east side of the entrance to the bay, erosion occurs at the south end of the eastern barrier with transition to accretion around the bend to the eastern side. Accretion is dominant along the eastern limb of the Rondeau barrier until there is a transition to erosion at the north end where the barrier is attached to erosional bluffs. The observed pattern is consistent with a single littoral cell with continuous transport from west to east. It is inferred that deposition at the Pointe-aux-Pins barrier occurs as a result of a decrease in the rate of easterly transport, not from convergence of two cells. This pattern of transport will lead to widening of the entrance to the bay and make maintenance of the present harbour breakwater system increasingly difficult.
Bibliography of Canadian Geomorphology