ERDC/CHL CHETN-II-47
March 2004
Figure 19. Aerial photograph (from Bay County, FL) location map and shoreline change analysis
(courtesy of Linda Lillycrop, Mobile District) of the five hot spots along Panama City, FL, fill
project
Perdido Key, AL. The hot spot is located on the east (updrift) side of Perdido Pass along this Gulf
of Mexico beach area just west of the Florida/Alabama border (Figure 20). The hot spot is a
naturally occurring erosion area and no fill has yet been placed here. Perdido Pass migrated 1.3 km
(0.8 miles) to the west over the past 100 years (prior to being stabilized with navigation jetties in
1968-69) and the hot spot is just to the east of the old inlet location. Possible wave focusing occurs
from irregular nearshore bathymetry. Remedial action may include placement of fill material in the
hot spot area.
Southern California Projects. Three hot spots have formed along the southern California coast
south of Los Angeles/Long Beach Harbor. The southernmost hot spot is at the northwest end of the
Surfside/Sunset Beach nourishment project. This area is in the vicinity of the south (downdrift)
arrowhead jetty of the entrance into Anaheim Harbor and the Naval Weapons Station (Figure 21).
Wave reflection off the arrowhead jetty produces a highly oblique reflective wave train that scours
nourishment sand placed on the beach adjacent to the jetty. The second hot spot is on the eastern end
of Seal Beach on the northern (updrift) side of the north arrowhead jetty. The third hot spot is located
on Peninsula Beach, located northwest of the northwest jetty at the three jetty entrances into the
Long Beach Marina and the San Gabriel River mouth. Localized drift reversals flow to the northwest
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