Mattituck Inlet a range of 15,000 to 25,000 cu/yd year was employed as the gross
transport rate.
Inlets with an r ratio of less than 20 tend to be unstable and non-navigable,
and sand bypassing is accomplished by wave-driven transport across the
bypassing bars. Goldsmith Inlet is non-navigable and does not have an ebb shoal
or bypassing bar, in conformance with the prediction.
Table 6-5
Goldsmith Inlet r Ratio and Associated Physical Quantities
Quantity
Goldsmith Inlet
Tidal range (ft)
3.2
5
9.5 10
Surface area (sq ft)
6
3.04 10
Tidal Prism (cu ft)
Transport rate (cu yd)
15,000 - 25,000
r ratio
4.5 7.5
Goldsmith Inlet channel cross-sectional area stability
The stability of Goldsmith Inlet was analyzed with the CEA model. Because
Goldsmith Inlet is a small inlet located on a sheltered coast, the predictive
equation derived by Byrne et al. (1980) for small inlets was selected and entered
as a user-specified relation in the model. The minimum cross-sectional area of
the inlets studied by Byrne et al. (1980) ranged from 5.4 to 270 sq ft, bracketing
the minimum cross-sectional area at Goldsmith Inlet of 80 sq ft. The channel
area was obtained from the bathymetry survey of 6-8 October 2002.
Table 6-6 summarizes the physical quantities that served as input to calculate