function without attempts to restrict displacement or to create barriers to sediment
transport to or across the foredune. This is a type of dynamic restoration that
supports the translocation of sediment and the displacement of the foredune to a
new natural accumulation setting (Fig. 3.7). The foredune feature is being restored
as sediment is transported inland to compose some component of the alongshore
variable foredune morphology. It persists in its spatial association with the ambient
processes and sediment availability.
3.5.3 Manipulation: Rehabilitation Augmentation (Human
Intervention)
Foredune rehabilitation applies to an existing foredune that is being maintained in
its non-equilibrium location by small adjustments to its sediment budget that
augment the feature that would normally be mobilized and displaced. At Davis
Park (Fig. 3.8), the foredune has not migrated much in recent years because of
repeated augmentation of the profile seaward of the foredune crestline. Sediment
placed at the seaward margin of the foredune by bulldozer, by beach scraping, by
transporting from off of the island, plus a constancy of fence lines have attempted
to create a foredune feature seaward of its natural location (Fig. 3.9). Over time,
the emplaced sediments have not been retained, primarily because the beach is
relatively narrow and storm waves have reached the base of the accumulations and
scoured the face of the foredune.
Fig. 3.7 Migration of the
foredune, Point O’Woods.
Despite attempts to trap
sediment and stabilize the
foredune, the processes of
sediment transport are
continuing to support the
foredune feature as it is
transgressing inland. The
house has subsequently been
moved
42
N. P. Psuty and T. M. Silveira
transport to or across the foredune. This is a type of dynamic restoration that
supports the translocation of sediment and the displacement of the foredune to a
new natural accumulation setting (Fig. 3.7). The foredune feature is being restored
as sediment is transported inland to compose some component of the alongshore
variable foredune morphology. It persists in its spatial association with the ambient
processes and sediment availability.
3.5.3 Manipulation: Rehabilitation Augmentation (Human
Intervention)
Foredune rehabilitation applies to an existing foredune that is being maintained in
its non-equilibrium location by small adjustments to its sediment budget that
augment the feature that would normally be mobilized and displaced. At Davis
Park (Fig. 3.8), the foredune has not migrated much in recent years because of
repeated augmentation of the profile seaward of the foredune crestline. Sediment
placed at the seaward margin of the foredune by bulldozer, by beach scraping, by
transporting from off of the island, plus a constancy of fence lines have attempted
to create a foredune feature seaward of its natural location (Fig. 3.9). Over time,
the emplaced sediments have not been retained, primarily because the beach is
relatively narrow and storm waves have reached the base of the accumulations and
scoured the face of the foredune.
Fig. 3.7 Migration of the
foredune, Point O’Woods.
Despite attempts to trap
sediment and stabilize the
foredune, the processes of
sediment transport are
continuing to support the
foredune feature as it is
transgressing inland. The
house has subsequently been
moved
42
N. P. Psuty and T. M. Silveira