Figure 4-7.
Offshore shoal elevation change, 1969-2002 and Mattituck Inlet
16 April 2003
Table 4-1
Estimated Offshore Volume Change, Mattituck Inlet, 1927-2002
Volume Change (cu yd)
Area
1927-1969
1969-2002
1927-2002
Total study area
155,000
188,000
343,000
Seaward shoaling area (polygon A)
78,000
35,000
113,000
Landward shoaling area (polygon B) negative 45,000 44,500
negative 500
Total shoaling area (polygon A/B)
33,000
78,500
111,500
East bypass bar area (polygon C)
13,500
12,000
25,500
Total offshore shoal area from 21.5 ft NAVD88
13,500
Deposition Rate (cu yd/ year)
Area
1927-1969
1969-2002
1927-2002
Total study area
3,700
5,700
4,700
Seaward shoaling area (polygon A)
2,000
1,000
1,500
negative
Landward shoaling area (polygon B)
1,000
1,000
0
Total shoaling area (polygon A/B)
1,000
2,000
1,500
East bypass bar area (polygon C)
300
400
350
Total offshore shoal area from 21.5 ft NAVD88
500
114
Chapter 4 Morphology Change, and Channel Shoaling and Migration
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