Enayam Port

Tamil Research Institute
RAPID TECHNO-ECONOMIC FEASIBILITY REPORT FOR
DEVELOPMENT OF COLACHEL PORT AT TAMILNADU
FINAL REPORT
7.1.6.2. Wave transformation from deep waters to shallow waters
As a first step, a selection process is used to extract a subset of wave situations which represent the available
ocean conditions from the reanalysis database.
These sea states are propagated using to shallow water areas in different points of interest in which one-time
series of wave parameters will be reconstructed.
The propagation model used for it (SWAN) consists in a numerical approximation of waves from deep water to
shallow water near the coast in order to evaluate the variability of the wave climate.
The bathymetry of the area of study and the orientation of the coast with respect to the incident waves
are both decisive for the most relevant phenomenon that affects the wave in each particular case.
Figure 103: General grid (red line) and detail grid (green line)
A number of points of interest are located near the coast (P1, P2... P21).
Figure 104: Analyzed points in shallow water along the coast
The reconstruction of the time series of wave parameters at near shore is carried out using an interpolation
technique based on radial basis functions (RBFs). The time series are transferred from deep water to the points of
interest at shallow water by means of the RBFs functions calculated for each propagated parameter.
The RBF technique has proven to be a powerful technique to reconstruct time series of sea state parameters for
each sea state at deep water.
7.1.6.3. Shallow water wave climate
When the reconstruction of the time series of wave parameters at the near shore points are carried out, the
characterization of wave climate in shallow points can be done.
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