Coastal Geomorphology

Coastal Geomorphology - Coastal Geomorphology Depositional...

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Coastal Geomorphology Depositional Landforms landforms in the sediment (mostly sand) delivered by rivers and, to a much lesser extent, generated by headland erosion 1. beach o average wave energy is sufficient to transport sand from the shallow sea bed and move it onshore o higher gradient gravel, boulder or shingle beaches occur at the base of headlands and behind sandy beaches , that is, where there is higher wave energy capable of removing sand o sand is carried onshore in the swash ; the backwash seeps into the beach and flows seaward with has sufficient energy to suspend and remove only the finer sediments (silt and clay) o thus beaches are a lag deposit of sand drifting along the shore, as the swash commonly is oblique to the shoreline whereas the backwash is always directly seaward (down the beach) o beaches adjust quickly to changes in wave and tidal energy resulting in a change in beach mass balance = sediment inputs (fluvial + from offshore + eolian + mass wasting sea cliffs) - sediment outputs (eolian + to offshore)
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This note was uploaded on 12/15/2011 for the course GLY GLY100 taught by Professor Jaymuza during the Fall '10 term at Broward College.

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Coastal Geomorphology - Coastal Geomorphology Depositional...

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