Table 2
EFFECTS ON COASTAL PROCESSES AND ADJACENT PROPERTIES
Option
Effect
No Action
Eroding shoreline will continue to supply material for transport to adjacent shores.
Relocation
Eroding shoreline will continue to supply material for transport to adjacent shores.
Bulkheads
Protect eroding shorelines that may have been supplying material to downdrift areas,
which may then experience accelerated erosion. The fronting beach may experience
increased erosion due to wave reflections.
Revetments
Protect eroding shorelines that may have been supplying material to downdrift areas,
which may then experience accelerated erosion.
Breakwaters
Diminished wave energy behind such structures induces deposition. If the amount of
sediment accumulation is significant, the downdrift shore may experience accelerated
erosion. If wave energy is significantly reduced, the area behind the breakwater may
not have sufficient circulation to maintain water quality.
Groins
Impede longshore transport and induce sedimentation. The downdrift shoreline may
experience accelerated erosion due to lack of material supply-
Beach Fills
Provide a new supply of material to the littoral transport system. Increased suspended
sediment loads could shoal adjacent navigation channels.
Vegetation
If some material is retained that previously was transported alongshore, it is possible
that the downdrift shoreline may experience minimal erosion damages.
Drainage Controls
No significant effects.
Slope Flattening
No significant effects.
Perched Beaches
See "Beach Fills".
Structures and Fills
By filling the structures to near capacity with sand, the longshore transport may pass
around the structure and continue to supply the downdrift shore.
Structures and Vegetation
The vegetation helps the structure more effectively retain sand, which could cause
increased downdrift erosion.
EFFECTS ON SHORELINE USES
Table 3 lists the significant effects of the various options on shoreline uses.
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