and opens up new research areas. This possibility is left for a new
study.
b. NMLong-CW is expected to be applied primarily to describe
shallow-water conditions, where limited water depth will typically
exert more control on wave transformation than amplitude
dispersion. Comparison between calculations and measurements for
the CHL-I data indicated good agreement for the wave decay on an
opposing current calculated with linear wave theory, although
blocking did not occur in the CHL-I cases (they were designed using
linear wave theory so that blocking would not take place).
c. The dispersion relation given by third-order Stokes theory is not
valid in the nearshore (shallow water, where Ursell numbers exceed
25; see Isobe and Kraus (1983)) where NMLong-CW is targeted. A
dedicated effort will be required to determine a suitable dispersion
relation validated with high-quality data for shallow-water wave
conditions.
The data sets employed to verify the longshore current simulations
showed that adding the roller model significantly improved agreement
between calculations and measurements. Overall, this agreement was good
except for some field data sets with complicated profile shapes involving
longshore bars. For these situations, the roller model failed to produce a
shoreward shift in the forcing that sufficiently large to make the calculated
current peak agree with the measurements
The model NMLong-CW has substantially increased capability to
represent waves and nearshore circulation, or wave transformation in a long
and narrow inlet, where the interactions between current and waves is
expected to be significant.
.
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Chapter 7 Summary and Conclusions
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