Abstract
Coastal erosion management demands knowledge of the sediment budget of the problem area. The Gold Coast budget is unusual in that it is longshore transport dominated but receives little or no sand from freshly weathered rock; sand is palimpsest and is derived from erosion of Pleistocene beach ridge systems well updrift. Moreover, both Pleistocene and Holocene sinks are either subaerial or shallow subaqueous; no submarine canyons exist in the region. Some evidence exists for two inner shelf sinks. Supply from updrift stores has until recently buffered the Gold Coast from the impact of late Holocene erosion, but there is little likelihood of natural increases in supply in the future.
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