the area where a longshore bypassing bar has developed. Elevation changes for
the total offshore shoal were calculated from a reference datum of -21.5 ft
NAVD88, taken to be the ambient depth found at the base of the shoal. Table 4-
1 summarizes the results of this analysis.
Figure 4-6.
Volume change polygons, east of Mattituck Inlet, with elevation
change 1927-2002
113
Chapter 4 Morphology Change, and Channel Shoaling and Migration
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